C4 Reliability





When the time comes, I'll be back to consult with the experts here. What a great community and resource for what I still consider "America's only true sports car".
Other than that the car is reliable gets good mileage, and not good with snow flakes.
buy an 87 nissan,honda,toyota,hundai, or any other car or truck of any brand. with 84,000 drive it for 3 yrs.put another 8,000 on it. go to any snow state,exhaust is junk in 3 to 5 yrs if yours was still original it was 25 yrs old, just maintenace. pads and rotors were probably shot or close to it when you bought it,you were lucky to get another 8000.you replaced the shocks because there 25 yrs old and you wanted to,if they were not shot they should be after 25 yrs.. 85,000 plus on an idler pully,thats damn good. the seat motor quite because it probably hasn't been used in 15 to 20 yrs.and was just stuck. remove it tear it apart,clean it up,lube it and it would of probably been fine.that or remove the bic liter that was wedged in the track. all other repairs were electrical,thats expected,every repair shop in the world is full of 1 to 5 yr old cars with electrical problems. i think you have had a pretty cheap maintenace free car. if you don't want maitenance or repairs go buy a new whatever you want, make 400 to 500 dollar a month payments on it for the next 5 yrs.. and when your done,you own it out right,you can enjoy and start the process all over again. oh; did i mention on that new car the exhaust is now rotted out,the shocks are bad,your on your 4th brake job,the water pumps leaking,the 2 idler pullys are noisy,the alternator is going to go out next month and then damit,those pesky power seats quite working and this is right after your 5 foot tall wife just drove it and put the seat all the way up,and you now have to drive with your knees in your chin. sorry friend,but your 87 is nothiung but maint. and not very much. since you have it all fixed up.do you want to sell it? how much?

Last edited by mtnmanut; Mar 4, 2013 at 02:30 PM.





I spent another 6 months debugging the FI system and associated relays, switches and tuning the ECM.
With the exception of a transmission problem last year after overhaul, the car has been as reliable as our other vehicles.
We've taken it as far as S.Dakota for vacations without worries.
Ya gotta have an FSM and a paperclip to travel with a C4.
That's how they make them at the used car factory.
The Best of Corvette for Corvette Enthusiasts





The first 8 years I put a lot of miles on her and spent close to what I paid in repairs, which included one elective paint job and another paint job from a deer.
Did the usual opti, water pump, plugs, wires, u joint, wheel bearings, poly bushings and lots of other misc.
I'm at 135K now, still drives and handles like it's new. I need to pay attention to the engine as it needs something. I'll probably do injectors real soon, hoping its not another opti. ZF trans could use a rebuild but until something goes real wrong with it I'll wait for that.
Best car I've ever owned.



I bought my 94 AT about 14 months ago with 34k on it and put about 8k more since. I did the standard maintenance when I bought it with the oil and transmission fluid+trans pan gasket. Sway arm bushing in the rear were shot and put some polys in there, cheap. Previous owner tossed the FX3 shocks and put junk in that was shot so I took the chance to upgrade to QA1, but if I stuck with Bilsteins, it would have been reasonably cheap. Um...flushed my coolant recently. Speed sensor on the back on the AT had a leaky o-ring. It took $5 and 10 minutes to fix. Biggest issue was the blown rear main seal. Shocked that it went out at such low miles, but I hope the rest of the car is a good as it looks. Oh, and I am finally replacing the acrylic top this week.
Have fun. I love this car and hope that it keep on rollin
Sounds like you have a good one. To be honest cars at over 20 years old is based on how the previous owner looks after, stores and drives them. I say all 3 because sometimes car that are stored extensively have their own issues (oil leaks etc).
The biggest Achilles heal on L98s is blown head gaskets. Galvanic corrosion between the alloy heads and iron block is the issue. The engine will not go bang or mix oil and water generally speaking. But a slow weep on piston 7. There are often no symptoms, engine drives hard, no smoke, no smell (because it evaporates). On mine the only tell tail was the bottom transparent tank was gradually filling up with coolant as the vacuum when the car cools would escape from the weeping gasket.
The other pain is the heater core, touch wood this has not happened to me.
The other thing on C4's (this is a personal feeling) is the poorly insulated wires. I see some exposed or thinly insulated wires specially the wires near the fire wall. I have progressively loomed the wires and bunched them to keep them away as best I can from heat sources. Not fun trying to look for a miss connection down the track.
Cheers,
Gary.





- Water pump
- Both headlight motors
- Transmission at ~140k (automatic)
- Injectors
- Fuel pump
- Atari dash died
- Everything Bose
- Multiple U-joints
- Rear Hubs
- Rear hatch hinge broke (not a fun fix)
- Weatherstripping
- Radiator
- Windshield wiper switch
I'm sure there is more, but I really can't think of it at the moment. The only 1 that was a colossal failure was the transmission. Was driving down the highway with the cruise control set at ~75mph and out of nowhere - KA-BOOM. The inside looked like a grenade went off. Even the case was unusable. To this day I have no idea what caused it to happen/





Original owner
Done...
Opti-spark
Plugs and wires
Water pump
Brakes
Battery 3x
Tires
Annual oil changes
Coolant replaced 2x
Wipers
Needs to be done...
Both head lights
Driver seat electric cradle
Belt
Hoses?
Bose has issues but works
Overall a great car to own!
Last edited by Retxpres; Mar 6, 2013 at 07:43 AM.
Just my $.02 worth.









