ZR-1 Maintenance Tips

General Maintenance

by Jim VanDorn

 

The most common call we receive by far is from a confused ZR1 owner. After years of reading everything from which thermostat to use, to what type of spark plug is best, the average owner is totally and completely confused...and for good reason. There are many varied opinions of what is best for our cars but that may depend greatly on how you use your ZR1.

 

After seven years plus, many ZR1's are finally accruing some mileage. We have had the opportunity to closely inspect many engines with a variety of types of use from normal street driving to severe "weekend" use (track time). Compiling this information we can now offer the ZR1 owner some observations. One rule we've adopted after hearing so many owners say the same thing is the "DIMWIT" or "Darn, if I didn't Mess With IT" rule. In other words, if you didn't have a problem, then what are your intentions in the first place? To date, the only company known to have a fleet of engineering ZR1's to test with was GM and it's affiliates.

 

Therefore, we must ask ourselves if their suggested procedures and parts recommendations should have a considerable amount of merit. Obviously they do, but on the other hand, there are no doubt areas for improvement. Although we will begin our segment discussing the routine and normal maintenance of the ZR1, there are many areas where an upgrade will be suggested.

 

Please understand that these are personal opinions and experiences and are not intended to conflict with service procedures outlined in the appropriate service manual.


  Articles

LT5 Secondary Port Operation & Vacuum Diagnosis


Before getting into diagnosing the LT5 engine's secondary port vacuum system, I thought it would be a good idea to take this opportunity to clear up a few popular misconceptions about the LT5 engine and establish a basis for understanding what the engine is and how it operates.

The heart of the 1990-1995 ZR-1 Corvette is the LT5 engine; one of the most technologically advanced engines of its time. A lot of misconception seems to exist about the history and operation of the LT5 engine.

Rather than go into great detail here about the engine, a few facts should be addressed up front:

  1. The LT5 engine is an all aluminum, double overhead cam design with 32 valves, and 16 fuel injectors (8 primary, 8 secondary).
  2. Power output was as follows:
    1.         1990 - 1992: HP: 375 hp @ 6,000 rpm, Torque: 370 ft-lbs @ 4,800 rpm
    2.         1993 - 1995: HP: 405 hp @ 5,800 rpm, Torque: 385 ft lbs @ 4,800 rpm
  3. The LT5 motor was designed and engineered by both GM Powertrain in Detroit, MI *and* Lotus Engineering in Hethel, England. It was not solely designed by Lotus Engineering. It should be noted that at the time, Lotus was owned by General Motors.
  4. The motor was built by Mercury Marine in Stillwater, Oklahoma. Mercury Marine was chosen by GM to build the LT5 due to their expertise in building aluminum outboard motors and their ability to manufacture engines on a small scale.

Valet Key ("Power Key")

Since there is a lot of misunderstanding about what the purpose of the Valet Key is and how it works, I thought I would include the following from page 6E3-C2-2 of the 1990 Corvette Service Manual:

"The driver can select two engine power modes, "FULL" or "NORMAL" power, with a a console mounted key switch. This switch is wired into the ECM, and allows the driver to determine the engine output by controlling secondary port throttle valves, secondary injectors and secondary fuel pump operation. When the key switch is in the "FULL" power position, the "Full Engine Power" light, located in the driver information center, is illuminated.


In the "NORMAL" power position, the ECM does not allow the secondary port throttle valves to be opened, or allow the secondary injectors to be turned "ON." In the "FULL" power position, the ECM enables secondary operation only if no trouble codes are stored and other criteria are met..."

It should be noted that with the key in the "NORMAL" power position, the engine is limited to approximately 210 horsepower.

The following information below comes from Tim Holland, a Lotus Engineer who started at Lotus in March of 1985 and began work on the LT5 project in July of 1985. Among his other responsibilities for the project, he served as the mechanical/calibration engineer as well as the emissions engineer responsible for meeting EPA requirements.

Secondary Port Throttle Operation

In order for the secondary port throttle valves to open, the following parameters must be met:

 

 Coolant Temperature  20 Deg C (68 Deg F) or above
 Oil Temperature  20 Deg C (68 Deg F) or above
 System Voltage  10 V. or above
 Trouble Codes (SES Light)  None
 Power Key  On
 Throttle versus RPM  See diagrams below

  When these parameters are met, the ECM will signal the ports to open and wait for .5 seconds before turning on the secondary injectors. As the secondary injectors share the same drivers as that of the primaries, the pulse width signals are halved when the secondaries operate.

As shown in the diagrams (below), there are three different styles of driving which will operate the port throttles:

  1. Ref. line A-B. Constant throttle position with a rising rpm. At the point the arrow crosses into the 'Port Throttle Opening Region' (top left shaded area) the port throttles open and the secondary injectors start firing.
  2. Ref. line C-D. Constant rpm with increasing throttle position - logic as above.
  3. Combination of the above: i.e. increasing throttle and rpm - logic as above.

Secondary Port Throttle

 

Vacuum Leak Diagnosis

One of the easiest ways to determine if you have a secondary port vacuum leak is to simply turn the ignition key to the on position but do not start the car. You should hear the Secondary Port Throttle Vacuum Pump turn on. If you don't hear the pump turn on, it's possible that it could be burned out.

The pump is located in front of the coolant reserve tank right underneath the headlight bucket on the passenger side of the engine compartment (see Figure 1 below). The pump should run for 5-10 seconds to prime the system and then turn off.

 

 

Figure 1 - Secondary Port Vacuum Pump - Part #10098474 (Also check Part #10098493)

Unfortunately the quality of this photo is not as good as I'd like but good enough for this example. This is the secondary port vacuum pump located under the passenger side headlight bucket

So what does this pump do? There is a vacuum reservoir located under the plenum. If the vacuum level in the reservoir drops below 41 kPa (12" Hg) while the secondary port throttle valves are open, the pump is turned "on" by a vacuum switch to supplement engine vacuum.

If the pump cycles on and off every few seconds or it runs continuously, chances are, you have a vacuum leak somewhere in the system.

To begin, take a ride to your local Sears Automotive Center and purchase a hand held vacuum pump as shown below in Figure 2. This pump is extremely invaluable and will help you to locate the source of the vacuum leak. The pump comes with all necessary hose adapters.

 

Figure 2 - Handheld Vacuum Pump

Figure 3 below shows the vacuum connection between the line going to the pump (right - see pump below) and the left hand vacuum system going underneath the plenum (left).

 

 

Figure 3 - Vacuum Connection

Disconnect the hose at this connection. At this point, with the engine key in the "On" position, the pump should turn on and run constantly. (Another way of verifying that the pump is operating correctly) Connect your hand held vacuum pump to the line going under the plenum and bring the system up to 10-12 Hg. If the system does not have a leak, the gauge needle will stay at that level. If there is a leak, it will slowly move back to zero. If there is no leak under the plenum, repeat the procedure at the other end of the hose going to the pump to determine if there is a leak on that side of the system.

If you have a leak under the plenum, it's time to remove the plenum from the top of the engine. To do this, follow the procedure outlined in your service manual for plenum removal. You should always have a service manual for your model year prior to conducting any diagnostic tests or repairs. If you don't have a service manual for your car, you can purchase one from companies such as MidAmerica, Ecklers or Helm.

To put everything in perspective, below is an LT5 engine with the plenum on (Figure 4 below). With the plenum off, it's a much different picture than what you see here!

 

Figure 4 - LT5 Engine Prior to Plenum Removal


Figure 5 - Secondary Port Vacuum Hose Assembly

In this photo, you can see the entire secondary port vacuum hose assembly (Part #10146221). At the lower right you can see the connector that is pointed to in the picture above. The upper left hand corner connects to another connector under the ECM.

 

 

Figure 6A - Plenum Removed
Key:
  1. Primary Port
  2. Secondary Port
  3. Secondary Port Control Solenoid
  4. Secondary Port Vacuum Actuator (Part #1996743) (just to the right, you can see the metal arm and attachment going to the injector housing
  5. Fuel Rail Assembly with injectors inserted into the Injector Housing

 

 

Figure 6B - Close-up of Primary and Secondary Ports

Figure 6B is a closeup view of a primary and secondary port. The primary port is on the right and the secondary port is on the left. You can see the butterfly valve inside the secondary port.

Below is a picture of the LT5 engine throttle body.



Figure 7- LT5 Throttle Body

In the center of the throttle body, at the bottom, you see the primary throttle valve which is 22 mm (0.87 in.) in diameter. Above are the two larger secondary valves which are 59 mm (2.32 in.). The secondary throttle valves begin opening when the primary valve is 80% open and are completely open at full throttle.


From page 2-9, Corvette LT5 Fuel and Emissions, Course No. 16009.14-1:
"The primary throttle valve is operational when the vehicle speeds are less than approximately 113 km/h (70 mph) (level terrain cruise). The secondary throttle valves are opened at approximately 80 degrees of primary throttle opening."

 

 

Figure 8 - Top View, Plenum Removed

Key:
  1. Secondary Port Vacuum Reservoir (Part #10067563)
  2. Crankcase Ventilation Cover
  3. Secondary Port Vacuum Actuators (Part #1996743)
  4. Ignition Coil Packs (starter is underneath them)
  5. Vacuum connector which plugs into the Secondary Port Vacuum Solenoid
  6. Crankcase Breather Hoses (Part #s 10110908, 10110907)

In this picture you can see the top of the Crankcase Ventilation Cover. For those of you with 1990 ZR-1s, this is a common area of oil seepage. The cover bolts were not torqued properly from the factory and can loosen up over time. If you notice the top of your engine V is damp with oil, chances are, this is the source. It's a good idea to replace the Crankcase Breather Gasket underneath (Part #10168682) and retorque the bolts.

 

Figure 9 - Top view, from driver's side

 

Key:

  1. Vacuum Solenoid with conical air filter (Part #1997222), Conical Air Filter Part #: 10159525
  2. Injector Housing
  3. Fuel Rail

Figure 9 is a different angle taken from the driver's side of the engine looking down at the vacuum solenoid.

 

Figure 10 - Secondary Port Solonoid


From LT5 Fuel and Emissions, a GM STG Training Course Book, pages 2-12 and 2-13:

Secondary Port Control Solenoid


This solenoid is used by the ECM to control the application of vacuum to the secondary port throttle valve actuators. The solenoid is normally closed and is opened ("ON") when the ECM provides the ground path. The solenoid is located under the intake plenum at the front of the cylinder block valley, near the left hand side of the vacuum reservoir. The sensor is connected to the engine wiring harness by a two terminal blue connector. (Refer to Figure 2-15)."


Figure 11 - Secondary Port Throttle Valves, Actuator and Linkage

Secondary Port Throttle Valves, Actuator and Linkage

"The secondary port throttle valves are used to provide additional control of airflow to the cylinders. The valves are vacuum operated, and controlled by an ECM actuated solenoid, based on input signals from the Throttle Position Sensor (TPS), engine RPM, engine oil temperature sensor and Manifold Absolute Pressure (MAP) sensor. Vacuum is supplied through the vacuum reservoir and vacuum pump. (Refer to Figure 2-14).


In operation, the secondary port throttle valves are closed during low engine speeds and loads, allowing no air path to each cylinder. Additional air is allowed to enter the cylinders at higher RPM when the following criteria are met:


When the TPS indicates to the ECM that the driver has pushed down on the accelerator pedal far enough, and the oil temperature sensor indicates engine oil temperature is within an acceptable range, the ECM will turn "ON" the secondary port throttle actuators through the secondary port throttle control solenoid allowing engine vacuum to be applied to the actuators to open the valves. At the same time, the secondary injectors are turned "ON" to provide additional fuel flow to maintain the correct air/fuel ratio for maximum power (12:1).


The secondary port throttle valves are located in the right and left hand cylinder head (four plates per head). The actuators are mounted to brackets attached near the center of each cylinder head. A common linkage incorporates each set of four throttle valves together to the actuators which will open all throttle valves in unison (Refer to Figure 2-14)."

At this point, if you trace the various connections of the vacuum lines, you'll see that they go to the secondary port throttle valve actuators, vacuum solenoid and vacuum reservoir. These are the three main areas for vacuum leaks to occur due to mechanical failure of these parts.


  1. Test the Secondary Port Throttle Vacuum actuators by disconnecting the vacuum line, connecting your vacuum pump and applying enough vacuum until you see the secondary port throttle valve plates open. Once open, they should stay open until you release the vacuum from the pump. If they slowly start to close, chances are the secondary port throttle valve actuator needs to be replaced. Conduct this procedure for both actuators.
  2. Test the Vacuum Reservoir by connecting your vacuum pump to one inlet and blocking the other. Apply 10-12 Hg of vacuum. If the gauge starts to decrease, replace the vacuum reservoir.
  3. Test the vacuum solenoid which is in front of the left hand side of the vacuum reservoir. Make sure all connections but one to the solenoid are blocked and connect your vacuum pump to the free connection. Apply a vacuum as described in step two. If the gauge decreases and vacuum is lost, the solenoid needs to be replaced.

Case in Point


Recently, I noticed that my secondary port vacuum pump was cycling on and off when the ignition key was turned on. I started off by confirming that a vacuum leak existed under the plenum. After removing the plenum I checked the vacuum at many of the connections and found that the vacuum solenoid was not holding a vacuum. Upon replacement, the vacuum pump primed the system, turned off and did not continue cycling on and off as before.

Tips


Keep in mind that if you run vacuum checks on the three main areas I outlined above and they all pass the vacuum check, it is possible that you have a leak somewhere else in the vacuum lines. The vacuum line system consists of several hoses and check valves that are routed throughout the "V" under the plenum.

Make sure that before you put the plenum back on the engine, all vacuum lines and electrical connectors are reconnected! This is very important because all it takes is one failed connection and you will be pulling the plenum back off to determine why the secondaries don't work at all.

As you can see, the most difficult part of diagnosing and repairing most secondary port vacuum leaks is the removal of the plenum. Once you get the plenum off, you have easy access to most of the key components that control secondary port vacuum operation. Good luck!

 

 

Author: Rob Loszewski - Corvette Action Center

Comments
hyhms
# hyhms
Thursday, April 6, 2017 9:30 PM

Jordan Sneakers For Sale


Nike Air Huarache For Sale


retro jordans for cheap


Timberland Outlet


canada goose jackets on sale


Toms Factory Outlet


Nike Air 90


Air Nike


Nike Zapatos


Nike Shox Cheap


Coach Bags On Sale


nfl store


Adidas Superstar Sale Online


pandora beads


Adidas Superstar


new yeezy shoes


TOMS SHOES OUTLET


Nike Shoes Discount Marketplace


Air Max 90


Oakley Sunglasses Cheap


Chaussure Nike Air Max Pas Cher


canada goose jacket outlet


Original Ugg Boots


Nike Online Store


Hugo Boss Sale


Vans Black Sneakers


Doudoune Moncler Femme Pas Cher


Air max dam


Michael Kors Outlet


vans shoe store


Toms Outlet Online


Nike Pas Cher Femme


UGG BOOTS FOR WOMEN


newest lebron shoes


Canada Goose Outlet


nike sportschuhe


womens nike air max


Doudoune Moncler Pas Cher


Boost Yeezy Sale On Line


ADIDAS NMD SALE ON LINE


abercrombie and fitch store


Air Max Kopen


air force one pas cher


zapatilla adidas


Air Max Femme


Adidas Shoes Discount Marketplace


nike sneakers


Moncler Outlet Store


pandora outlet store


Jordan Shoes Air


Pandora Store Sale


cheap uggs for women


chaussure Nike homme


Canada goose dam


Canada Goose Womens Coats


converse store


Moncler Outlet Online


religion store


Air Max Sneakers


Nike Shox discount Sale


Nike Air Women


Ugg Pas Cher Femme


cheap nike air max


ugg store


longchamp bags on sale


Nike Store


23 IS BACK Store


chaussure basket homme


scarpe hogan outlet


nike jordan shoes


Cheap Air Max Trainers


Nike Factory Store


nike air jordan pas cher


fitflops sale uk


Pandora Store


Discount TOMS


Hogan Outlet


uggs outlet


Scarpe Air Max


Jordan Schoenen


zapatillas nike baratas


Nike Air Max Goedkoop


Air Jordan Retro Sale


Nike Air Jordan 11


Michael Kors Handbags Discount


Ugg boots Sale


Official Toms Shoes Outlet


prada outlet


Yeezy Shoes Discount Marketplace


Discount Air Max


zapatillas running


christian louboutin outlet


Ugg Outlet Online Store


Pandora Store


Yeezy Boost Sale Online


Canada Goose Outlet


Yeezy Black


nike air max running shoes


hogan scontate


suivre un envoi


ugg clearance


Nike Air Damen


Stone Island Outlet


reebok running shoes


Adidas Originals Superstar


Bottes Ugg Femme Pas Cher


Adidas Neo Discount Sale


Cheap Toms Outlet Store


Uggs For Cheap


nike mercurial soccer cleats


Kobe Shoes Nike


Uggs Pas Cher Soldes


Pandora Official Website


Adidas Originals Stan Smith


Ray-Ban Official Discounted Site


billige nike sko


nike tn pas cher


ugg factory outlet


Nike Air Pas Cher


scarpe nike


chaussures nike pas cher


Yeezy Men


toms sale


Nike Shoes Sale Store


moncler jacket sale


Doudoune Moncler Site Officiel


adidas outlet


Nike Air Max Cheap


new jordan releases


Cheap Toms Shoes Outlet


coach factory outlet online


Air Max Pas Cher


cheap uggs


nike shoes


Air max levně


Ugg Pas Cher En France


Boutique Ugg


nike joggesko


huarache sneakers


toms shoes outlet


Negozi Pandora


Ray ban sale online


Michael Kors


zapatos de futbol nike


Ray Ban Sunglasses Online


Cheap Michael Kors


Descuentos Nike


louboutin heels


Nike Soccer Cleats Boots


Boty Nike Air


nike schuhe günstig


nike air


TOMS For Sale


Nike Air Sneakers


TOMS OUTLET


nike sb stefan janoski


Moncler Jackets Discount Marketplace


Soccer Boots Outlet nike


official NHL jerseys


günstige nike schuhe


Cheap Michael Kors Tote Bag


goedkope nike air max


adidas store


Moncler Sale


Jordan Store


pandora jewelry store


Nike Roshe Run Sale


new pandora charms


botas de futbol



hyhMs 2017.4.7
lzm00
# lzm00
Saturday, April 8, 2017 8:17 AM

burberry outlet


baseball jerseys


pandora rings


Basketball shoes


ralph lauren australia


mlb.com


bercrombie Nederland


coach outlet


michael kors outlet


pandora bracelet


authentic prada handbags outlet


pandora charms


michael kors outlet


moncler sale


jordan retro shoes


michael kors factory outlet


flash sunglasses


ray ban polarized


mlb store


louis vuitton australia


piumini moncler replica


nike shox shoes


air jordan shoes


coach factory


lebron james shoes


Burberry outlet online


moncler us


michael kors bags


Nike Air Jordan


abercrombie paris


ray-ban sunglasses


prada bags


coach usa


pandora rings


michael kors outlet


Jordan Retro


longchamp outlet


official prada site


prada bags


kate spade black friday


pandora rings


coach outlet online


pandora rings


polo outlet online


ate spade handbags


louis vuitton outlet


ray ban sunglasses


shoes online sale


prada outlet


pandora charms sale


ray ban outlet


kate spade handbags


yeezy boost 350


Hyperdunk 2016


prada us


abercrombie outlet


china factory sale


pandora necklace


pandora rings jewelry


prada outlet


Nike Hyperdunk Shoes


beats by dre


abercrombie us


Ray Ban Outlet


pandora necklace charms


michael kors italy


prada handbags


coach outlet


Pandora bracelet


louboutin shoes


mlb shop


coach


michael kors outlet


pandora australia


kate spade


Michael Kors Outlet


oakley sunglasses


coach outlet


Nike Air Jordan


Nike KD 8


michael kors outlet


pandora ring


pandora rings sale


prada official site


michael kors


nike outlet


oakley sunglasses


coach outlet online


abercrombie & fitch


mk outlet


nike store


basketball jerseys


prada outlet online


prada purses


Abercrombie Fitch


beats studio


prada outlet online


cheap coach purse


michael kors uk


moncler outlet


adidas yeezy boost 350


coach sunglasses for women


official michael kors


kate spade bags outlet


michael kors purses


nike jordan shoes


top sunglasses


michael kors outlet bags


coach online


canada goose sale online


michael kors outlet


michael kors tote


michael kors


nfl shop


michael kors outlet


prada online


paul smith uk


kate spade outlet online


prada glasses


coach bag


abercrombie outlet us


basketball jerseys


coach outlet online


ray ban online


pandora jewelry


tiffany and co


Michael Kors Canada


michael kors outlet


pandora jewelry


prada factory outlet online


michael kors


oakley frogskins


michael kors outlet


canada goose outlet


landinggear


KD 8 shoes


football jerseys


Chanel Outlet


Coach Sunglasses Outlet


moncler jacket


abercrombie outlet


ray ban sunglasses


michael kors outlet online


prada outlet


coach outlet


Ralph Lauren


michael kors bags outlet


coach outlet


prada handbags


prada bags


pandora bracelet


ray ban sunglasses


landing gears


michael kors outlet online


cheap basketball shoes


kate spade outlet


abercrombie and fitch


louis vuitton uk


coach factory outlet


michael kors outlet


nike shoes


canada goose sale


abercrombie and fitch


cheap moncler jacket


Hugo Boss Outlet


pandora bracelets


oakley australia


oakley outlet


michael kors outlet online


Hermes Outlet


oakley frogskins sunglasses


coach diaper bag


prada factory outlet


pandora charms


Mizuno Running Shoes


Mizuno Shoes


timberland boots


ray ban eyeglasses


salomon hiking shoes


mcm outlet


adidas shoes


coach sunglasses


CHanel Factory Outlet


michael kors outlet


pandora charms sale


veronique billat


paul smith sale


landing gear


nike shox


adidas australia


nike air max


Nike Jordans


michael kors totes


michael kors outlet


moncler outlet


coach purse


Jordan retro


burberry outlet


burberry australia


Mizuno Shop Japan


ray-ban sunglasses


michael kors purses on sale


Chanel bags Outlet


ray ban glasses


Michael Kors Outlet


michael kors handbags


michael kors outlet


canada goose jacket


Longchamp Outlet


prada outlet online


michael kors bags


Coach outlet online


pandora australia


ugg uk


snow boots


michael kors purses


Jordan Retro Shoes


burberry online


prada sale


chanel australia


coach carter


burberry outlet


burberry canada


louis vuitton outlet


michael kors handbags outlet


michael kors handbags


abercrombie us


coach outlet


pandora charms


Yeezy 350


official prada site


canada goose jacket


ray ban prescription sunglasses


moncler jacket


Pandora Charm


Billat


yeezy boost 350


major league baseball


chanel


nike australia


ray-ban sunglasses


ugg australia


Coach Outlet


moncler clothing


abercrombie outlet


coach outlet


prada outlet online


Adidas Yeezy Boost 350


prada outlet online


ray ban clubmaster


air jordan shoes


michael kors canada


pandora rings


Nike Hyperdunk 2015


michael kors outlet


jimmy choo australia


mlb shop


ray ban prescription glasses


burberry outlet canada


burberry outlet canada


Mizuno Shop


moncler mens jackets


pandora uk


michael kors purses outlet


nike basketball shoes


Hugo Boss Online


jordan shoes


michael kors outlet


Coach Outlet Online


prada factory outlet online


Oakley Outlet


michael kors tote


abercrombie and fitch


nfl jerseys


abercrombie fitch


authentic prada outlet online


prada outlet online


michael kors online


burberry scarf


Kevin Durant Shoes


yeezy boost 350 shoes


beats headphones


pandora rings


pandora uk


kate spade bags


brand sunglasses


Kate Spade Australia


burberry canada


nike free run


coach australia


kate spade outlet


michael kors us


baseball jerseys


sunglasses hut


burberry us


michael kors outlet


nike jordan shoes


kate spade canada


Oakley Holbrook sunglasses


asics shoes Australia


Ralph Lauren Polo


burberry outlet


ugg australia


pandora charms


coach shoes


prada outlet


burberry outlet


nike lebron shoes


nike lebron james


michael kors jet set tote


michael kors outlet


sunglasses sm


Free Run


prada outlet online


pandora rings


mcm outlet online


kate spade outlet


Prada bags


coach outlet


prada outlet


michael kors bags


pandora rings


Nike Air Max


nike air huarache


air jordan retro


salomon shoes


adidas australia


michael kors


prada outlet


Mizuno Wave


michael kors outlet


Canada Goose Outlet


ugg slippers


burberry


michael kors outlet


sunglasses outlet


coach australia


nike id


michael kors uk


ugg boots


nike australia


huaraches shoes


cheap ray ban sunglasses


louis vuitton factory outlet


coach factory outlet


Nike Free


kate spade


michael kors outlet


tiffany uk


michael kors outlet


michael kors outlet


nike huarache


pandora charms uk


burberry outlet


Oakley Holbrook


prada bags on sale


pandora jewelry


ralph lauren


coach outlet


huaraches


mk bags


hermes bag


ray ban outlet


coach factory outlet


michael kors outlet


nike jordan


nike com


kate spade outlet


pandora charms black friday


nike huarache shoes


mk handbags


michael kors outlet


ray ban new wayfarer


burberry scarf


prada sunglasses


coach outlet


coach outlet


prada bags outlet


shoes sale


abercrombie outlet


coach outlet store


kate spade outlet


shoes online


pandora charms sale online


coach outlet


moncler jacket mens


coach handbags


nike outlet


pandora charms


nike shoes


paul smith


chanel bag


pandora australia


yeezy boost 350


polo online


coach bags


football jerseys


china wholesale


moncler jacket


abercrombie outlet


kate spade outlet


clk benz


coach factory outlet


louis vuitton outlet


ray ban sunglasses


ups tracking


ray ban wayfarer


burberry australia


coach purses


burberry online


michael kors outlet


hockey jerseys


polo outlet


nike jordan shoes


asics Australia


kate spade black friday


burberry purse


Prada Factory Outlet


prada bag


prada factory outlet online


coach factory outlet online


michael kors australia


burberry outlet online


nike shoes australia


pandora bracelet


tiffany co


tiffany co


wholesale


michael kors handbags


prada handbags


baseball jerseys


coach outlet


véronique Billat


Yeezy Boost 350


pandora charms sale clearance


coach outlet


moncler coats


MIZUNO Shop US


mcm factory outlet


burberry scarfs


pandora.com


michael kors black friday


moncler outlet


timberland uk


coach handbags


pandora australia


coach outlet


pandora princess ring


prada outlet online


pandora charms


pandora necklaces


coach australia


oakley sunglasses


Hugo Boss Store


authentic prada outlet online


burberry outlet online


ray ban aviator


moncler down jackets


rayban aviator


Coach Outlet Store


sunglasses hut


longchamp outlet


kate spade


huarache nike


Cheap Ray Ban


michael kors wallet


Prada Outlet


burberry scarf


louis vuitton outlet


Nike Jordan Shoes


prada outlet prices


moncler uk


coach bags


coach outlet online


asics shoes


kate spade outlet online


kate spade bags


mens sunglasses


lzm4.8
chanyuan
# chanyuan
Monday, April 17, 2017 4:52 AM
qqqqqing20170417

michael kors outlet


los angeles lakers jerseys


louis vuitton outlet store


oakley sunglasses sale


coach outlet online


nike huarache


salomon outlet


lebron shoes


ferragamo outlet


ray ban sunglasses uk


polo ralph lauren outlet


michael kors outlet


fitflops outlet


mbt shoes


prada handbags


oakley sunglasses sale


ray ban sunglasses


hollister clothing


pandora outlet


michael kors outlet


michael kors outlet clearance


pandora charms


burberry outlet


nike outlet store


mlb jerseys


michael kors handbags


yeezy boost


polo outlet


louis vuitton


nike outlet store


cheap replica watches


swarovski jewelry


hollister clothing


beats by dre


nike uk store


cheap jerseys wholesale


ralph lauren outlet


foamposite shoes


hermes bags


nike free 5


prada sneakers


oakley sunglasses


louis vuitton outlet


coach outlet store


chrome hearts outlet


longchamp handbags


instyler ionic styler


louis vuitton outlet


giuseppe zanotti shoes


rolex watches


oakley sunglasses


ralph lauren


coach outlet clearance


louis vuitton outlet


camisetas futbol baratas


mulberry handbags


oakley sunglasses


christian louboutin uk


ray ban sunglasses


air force 1 shoes


polo ralph lauren


michael kors outlet online


coach factory outlet


ferragamo shoes


ralph lauren


ray bans


tods outlet online


mulberry sale


cheap ray ban sunglasses


rolex watches


michael kors outlet clearance


polo outlet


ray ban sunglasses


tory burch outlet online


polo ralph lauren outlet


michael kors handbags


fitflops


coach outlet online


michael kors outlet


cheap ray bans


michael kors outlet


true religion jeans outlet


michael kors handbags


christian louboutin shoes


adidas nmd


cheap jordans


cheap ray ban sunglasses


ralph lauren uk


true religion outlet


tory burch shoes


ralph lauren polo


fitflops


cleveland cavaliers jersey


michael kors outlet clearance


tory burch outlet stores


basketball shoes,basketball sneakers,lebron james shoes,sports shoes,kobe bryant shoes,kobe sneakers,nike basketball shoes,running shoes,mens sport shoes,nike shoes


michael kors outlet


mulberry handbags


cheap jordans


soccer jerseys wholesale


burberry canada


coach outlet store online


ecco outlet


louis vuitton borse


mulberry handbags sale


adidas uk store


new balance shoes


christian louboutin


louis vuitton outlet


beats headphones


ralph lauren outlet


los angeles lakers


louis vuitton handbags


coach outlet online


pandora jewelry


louis vuitton handbags


polo outlet


coach outlet


polo ralph lauren outlet


ray ban sunglasses


burberry outlet


polo outlet


swarovski crystal


michael kors uk


cheap nba jerseys


rolex watches for sale


oakley sunglasses


ralph lauren uk


kobe shoes


coach outlet online


cheap oakley sunglasses


coach outlet online


coach outlet online


hollister uk


mac cosmetics


asics,asics israel,asics shoes,asics running shoes,asics israel,asics gel,asics running,asics gel nimbus,asics gel kayano


coach outlet


hermes outlet


jordan shoes


nike roshe one


cheap oakley sunglasses


lacoste shirts


longchamp handbags


nike shoes for women


louis vuitton handbags


cheap ray ban sunglasses


gucci outlet


true religion jeans


longchamp handbags


lebron james shoes


adidas wings


coach outlet


polo shirts


polo ralph lauren


nike air max 2015


oakley sunglasses wholesale


kobe bryants shoes


ed hardy tshirts


michael kors outlet online


cheap oakley sunglasses


adidas outlet


louis vuitton


coach outlet


nike huarache


kate spade uk


mac cosmetics sale


juicy couture outlet


rolex outlet


nike store uk


coach factory outlet


louis vuitton outlet stores


burberry outlet


coach outlet


adidas outlet store


tory burch outlet


michael kors outlet stores


jordan shoes


true religion outlet


ray ban sunglasses


air max 90


nike air max 90


sac louis vuitton pas cher


michael kors handbags


ray ban sunglasses wholesale


reebok shoes


michael kors factory outlet


cheap nfl jerseys


gucci bags


louis vuitton outlet online


coach outlet online coach factory outlet


michael kors outlet


louis vuitton handbags


ray ban sunglasses outlet


omega watches


michael kors outlet clearance


jordan 4


ralph lauren


louis vuitton uk


tory burch outlet online


nike trainers


qqqqqing20170417
DurhamCarpet
# DurhamCarpet
Friday, May 12, 2017 6:32 AM
Buy decreased, sell huge, it's a good credo we have all heard earlier than, and it actually sounds like a sure option to utilizing your investment, right? Good, it's difficult than the fact that quote will make it sound and it is important to work diligently to make sure that you watch a great, huge return. preferrealestate.com


A plumber may be a professional who is repairing together with installing any pipes that will be used to include sewage together with water. Most plumbers work during the plumbing or air conditioner industry, however , nearly 16 percent for plumbers happen to be self-employed. proinjobs.com


If you have ever thought related to growing your own private hops, stop thinking and now. It is simpler than people think and not to mention the knowledge that your beer that there is hand written contains hops that there is grown a powerful back gardening and you now have a compelling issue to give it a go. purchaseshopping.com


College trainees are graduating, and Funeral obituary Day is certainly fast coming, which would mean summer is here. Getting available for warmer summer months doesn't has to be a uncomfortable experience; teach all by yourself healthy habits which you can continue throughout the year to assist you get towards shape and vacation in shape. readyforservices.com


Meeting the demands of your getting old parent is certainly overwhelming together with confusing. Lots of individuals are shed into those situations without having notice or simply experience. I thought my father was well-prepared until I recently found out she wasn't. The difficulties that appear through parent-child job reversal is more complicated than someone can prepare for. readyparenting.com


QR code may be a versatile tool that could be immensely for real residence marketing. Set that they are an essential an area of the real residence marketing during close near future, it is wise to buy it now. Study to knowledge QR code may also help make an individual's listings provide better. realestateeffort.com


What was on one occasion your vision home has now become an individual's nightmare. With no boys and girls to a couple of kids, you're running due to room with your last nerve has long been frayed by just Jr's hamster that have been out for his cage to your past 7-day period. realestategeo.com


People happen to be avoiding any different kinds of investment as a consequence of slump together with poor health and safety situation during Pakistan. As a consequence of recession, real estate slump together with terrorism during Pakistan, rich together with professional ındividuals are quickly immigrating that will advanced community welfare areas. realestatemassive.com


Even just about the most luxurious together with expensive homes as of late are getting in on any act, as your home builders will find that eco-friendly products could be as useful even though beautiful mainly because their old counterparts. realestatescheme.com


One of the best ways to make the most of foreclosed real estate are to look for them on their pre staging. Unlike anyone late overnight get affluent quick infomercials would wish you to reflect, a property foreclosures home include the least favorable on your behalf. realestatetactic.com


These bizarre beasts, inhabiting some of our Cosmic Zoo, could be born similar way mainly because normal famous actors. However, Brown Dwarfs never acquire the critical mass that could be necessary that will ignite your nuclear-fusing furnaces. reallycoolsports.com


Everyone haven't wholly experienced daily life to a fullest before you've happen to be a guardian. It's an experience that people as all of us struggle with every single day despite experiencing done it all for numerous years. Novelists publish training books, teachers support parenting sessions, experienced nannies seem to be on television shows. realparentinghelp.com


It may be a well-known reality keywords are definitely the backbone within the Internet. Without having it, you won't be able to do much via the internet, but With each other, you will master search engines and thus generate customers for businesses out of your home, which would mean sales. selectorbusiness.com


Keeping an individual's pool clean is definitely essential a natural part of being a good responsible billiards owner. When people search for pool, contain a pool established, or search for home by using a pool for to begin with, they never realize what amount of work together with effort goes into 'keeping it all up. woul servicesbasic.com


With many different types of body system shops on the market, it's crucial for you to know what kinds to choose when getting the best love your automotive. Determine choosing the ideal an motor vehicle body shop as soon as vehicle is searching for auto body system repair. shoppingaspect.com


Everyone likes customized products and services when they can be ordering hats to encourage a get together. Offering an individual's clients sublimating services on their custom limits is a wonderful way to boost proceeds. Here are strategies of ensuring a good flawless result all the time. shoppingmargin.com


The common explanation of when there is in a good precision piece of equipment shop is simple. It is actually an assembly-line progression, in which unfortunately numerical statements are fed suitable machine, which unfortunately translates the ones commands towards robotic decisions, resulting during the creation of each object or simply objects with a solid inhibit of tender metal. shoppingprecise.com


Many individuals are very successful in company and are very rich because of their businesses. Many of those individuals discovered fame in the commercial community together with their results stories happen to be no secret into the public. specializebusiness.com


Can actually many purposes why one would need passport snap shots. A passport specifications photograph is a symbol photograph associated with a human skin showing prominently above and beyond portion of the high torso acquire the shoulder joint. As any name shows, the earliest place you would need one of them is a good passport. techgenerate.com


It is certainly apparent that in an effort to survive together with thrive during the real residence industry at this time, real estate agents and real estate brokers must adopt every element of technology together with remain onto the will need to continually advance their solutions. technologyforreal.com


There are a lot of opportunities that will advance an individual's radiology career for people with one or over areas for specialization. Slightly more specializations you will have, the even more competitive you are in the duty market. techspecially.com


This month's file takes us into the western You. S. state for Oregon but some fantastic snow-boarding. First a bit of background over the state for Oregon again. Begin by using a little prehistory by third , link to sit and learn about Oregon and also Columbia level of skill. travelascend.com


Koi fish have already been called any national pike of Japan and tend to be popular during China and around the world. This report describes the history of Koi fish breeding and gives useful material regarding how different kinds of fish happen to be categorised as per their colourings and marks. travelescalator.com


Traveling by using a baby from a car is not really easy, but moving longer compared with two hours at this time sounds additional dreadful. Here's three truly great tips together with ideas on what to get ready, car with your baby for an extremely long visit. travelinglong.com


Travelling are usually a lot of fun, educational together with relaxing. Good, it is certainly suppose to generally be relaxing, should it be a holiday getaway. Sometimes holidays may not be relaxing. In order to make your holiday getaway travel relaxing one must always plan ahead and now have things planned. travelrelaxation.com


You were definitely born utilizing potential. Which you were born utilizing goodness together with trust. Which you were born utilizing ideals together with dreams. Which you were born utilizing greatness. Which you were born utilizing wings. Your not meant meant for crawling, which means that don't! You will have wings, try to use him or her and fly on an airline... trulyfinancial.com


Having your website for the business together with using on line SEO internet marketing is a wonderful way to communicate in your loyal users, while at the same time attracting different ones in the process, depending over the types of services and products you have to offer. ultimateseomarketing.com


When enjoy the Conclusive plans to your location to your wedding, select the spot that mirrors your character in addition to a location the fact that that pair of you have certain feeling for or perhaps some experience of. weddingfinally.com


Hiring services of the best wedding photographers is really important. It ensures that you purchase the finest quality photos in your wedding. Weddings have grown special events during the lives of a lot people. This is certainly attributed to the reality that weddings come to pass once during the lives of a lot people. weddinghappens.com


Monograms have long been used as the personalized icon of way, taste, together with style. Jean Rene Lacoste put to use one regarding his shirts that started to become the single most iconic way brands worldwide. Tennis super star Roger Federer purposes one regarding his clothing as the statement for personal layout. weddingwithclass.com


Post Comment
Only registered users may post comments.
  Disclaimer

The information contained in this website is for general information purposes only. Whilst we endeavor to keep the information up-to-date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the website or the information, products, services, or related graphics contained on the website for any purpose. Any reliance you place on such information is therefore strictly at your own risk.

In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of or in connection with the use of this website.

Through this website there are links to other websites which are not under the control of the ZR-1 Net Registry. We have no control over the nature, content and availability of those sites. The inclusion of any links does not necessarily imply a recommendation or endorse the views expressed within them.

Read the full Disclaimer...

©2017 ZR-1 NET Registry   |  Privacy Statement