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

Troubleshooting

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

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Information and troubleshooting the air conditioning system.

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Information regarding issues with the radio antenna.

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Information on resolving backfire problems.

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Information on dealing with and avoiding carbon build-up.

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Describes issues with the CD player.

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Information on the chain tensioner rattles heard with the LT5.

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Describes the functioning of the Change Oil light and how to reset.

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Describes what the "Check Gauges' light means.

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Posted in: Troubleshooting
Information on replacing the clutch/flywheel.

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Information tables on the meanings of the HVAC diagnostic codes.

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Information on the cause of Engine stumbles.

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How to correctly and inexpensively correct the 'Inf Rest' light on 1990 Corvettes.

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Information regarding concerns with the stock flywheel.

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Describes the operation, variability and issues with the Fuel Gauge.

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Information on issues with the GM Clutch Hydraulic System Actuator.

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Describes the functioning and cure for the Inflatable Restraint Light (INFL Rest) Light.

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Information on resolving "No Start" issues when the engine cranks.

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Information on resolving the "No Start"  issue when the engine won't crank.

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Information on the various potential sources of oil leaks.

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Describes functioning of the oil pressure gauge and possible issues with low oil pressure.

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How to remove the LT5 Plenum.

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Thanks to Erle, Hib, Ed, James, and even Bruce, I've figured out how to read Diagnostic Trouble Codes on the 1994-95 MY ZR-1.   The 1994 servi...

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Describes issues with the ZR-1 seats.

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Describes the meaning of the Service Engine Soon (SES) light.

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Information on the Low Tire Pressure Warning System (LTPWS) and causes of warning light illumination.

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What the Service Ride Control light means.

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Information on the Targa top and discussions of known issues.

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The GM Body Systems application is used to diagnose vehicle body electronic systems. The GM Body Systems application allows you to monitor data and co...

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Information on engine upgrades made between different years.

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Information on the stock wheels and tires and known issues.

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Describes the ZR-1 windshield and issues that may arise.

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Causes and possible cures for the "No Start" issue.

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