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

Electrical


Information on the auxiliary power supply hidden under the center console.

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Alternator Rebuild
Rebuild your alternator instead of replacing it.

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Posted in: Electrical, Engine
Alternator Replacement
How to replace the alternator (if the it's rear bracket is not installed) without removing the plenum.

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Posted in: Electrical
Information regarding issues with the radio antenna.

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Repairing the radio antenna

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Posted in: Body, Electrical
How to bypass the clutch safety switch to avoid the "no start" issue.

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Posted in: Electrical
How to defeat the 1-4 skip shift (CAGS)

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Door Ajar Problem
How to fix the Door Ajar problem.

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Posted in: Body, Electrical
How to correctly and inexpensively correct the 'Inf Rest' light on 1990 Corvettes.

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Fuel Gauge Sender Unit Repair
Removing and repairing the Fuel Gauge Sender Unit

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Fuel Pump Replacement Steps
 These are excerpts from mail posted in 1999 that will help understanding the pictures. I have posted these now (2/10/01) as a result of inquirie...

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Posted in: Electrical
INFL REST fix

I fixed the Drivers side Air Bag sensor (SIR) to ground problem by removing this sensor, cleaning the ground surfaces and applying dielectric grease. The pictures tell the story of how I did this.

 

Also included are several problems encountered and resolved.

1. Bad battery connectors. (replaced)

2. Bad grounds on accessory lead coming from battery and ground strap coming from the LT5.

3. Made a workaround to the difficulty of removing the panel with the gill slits such that next time it will be easy to remove.

4. Added theft protection plate between the gill slits and the battery.

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Posted in: Electrical
LED Underhood Engine Lamp Replacement
Symptoms: Under normal use you'll see MELTED plastic in the bulb holder on the two underhood lamps. See image on the right.  Also, ...

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Posted in: Electrical
How to remove the number 8 spark plug.

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Procedure: Turn ignition switch on (without starting engine) and turn wheels fully to t...

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Posted in: Electrical
Causes and possible cures for the "No Start" issue.

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How to fix a bad backup light switch.

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Posted in: Electrical
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