1995 C4 Corvette. Overheating engine shut off


Asked by Jun 27, 2014 at 02:40 AM about the 1995 Chevrolet Corvette Coupe

Question type: Maintenance & Repair

So I bought my 16 year old son a cool car, classic 1995 Corvette and its been in the shop more than he has been able to drive it.  Mechanic struggling to get the car from overheating.  replaced the radiator, water pump, sensors and therm.  Took it for  test run with him with computer hooked up to test the gauges.  Freeway, ran sweet with a temp of 186.  Took side streets back to shop and overheated at 265 and engine shut off and fluid leaking out of res.  Had to have it towed since the computer shut off the engine.  What is causing this crazy situation?  Anyone???

7 Answers


typical C4 problem my 94 Coupe doesnt go that high about 225-230 . It's troublesome. I bought a progam to that would allow me to change fan on temps, not much help. Big issue, the radiator gets air bound because of the low location, drilled two 1/16 holes opposit each other in the thermostat it stopped the high temp overheat around town. Mine sat for three years, last for me is a chemical and machine rad flush. Frustrating, love the car. When the AC is on the low temp fan should run on start up, don't know wether its low air flow in traffic or not enough circulation. My last step would be to dill and tap the mainifold and make a water crossover between the rear cylinder banks. Worked on my on my Offshore Race engines, No rear water crossover on the 350 and the rear cylinders get air bound especially when you decelerate.. Good Luck Bud

4 out of 4 people think this is helpful.

Good stuff. It is a bad ass car, just need to get it dialed in for the kid and Me on an occasional weekend drive. Talked to my mechanic today, he put in a larger radiator and hooked both fans on the same relay so duel fans, hope it stops this nightmare.

2 out of 2 people think this is helpful.

I assume the thermostat was checked? You might consider a 10 degree lower opening temp to start the fluid moving sooner to keep the engine cooler. Running both fans will help in town. If it overheats on the highway, there may be something inside the engine causing the problems. Have someone hit it with a temp gun tester and see where the hot spots are. When were the hoses hanged? Sometimes they clamp down and restrict the water flow when they get hot. Cheaper that a new engine.

3 out of 3 people think this is helpful.

265 is crazy high temp. What degree does the fan start at? My 92 starts at 225. If in a standstill situation, activating a/c reduces it 10 degrees, by turning the secondary fan on. My highway cruise temp is 193 always. There are temp senders available that activate the main fan at 2 lower than stock temps available at www.corvettecentral.com. Since it did not overheat at speed, that eliminates the reduced flow theory, unless as CC just mentioned, a hose could collapse, or create a partial block from the inside. Let us know when you find a solution, Cheers.

1 out of 1 people think this is helpful.

sorry to hear of all the issues yall are having.it is obvious the previous owner stopped the keeping the machine working.you are stuck with getiing it going,dont give up,once you get it working it wil be a beast and by stay reliable.please check the alternatormake sure it is fresh or new as it is the heart of the electrical system,and you must not use parts from aouto zone and so like stores,Only use ac delco or higher quality parts.these are special machines and take special care,i know it sounds crazy but i just recently spent almost 4 thousand on my 1991 corvette,most of the cost was labor,however it runs as good as day one.good luck

3 out of 3 people think this is helpful.

As i answered a while back about my 94 with the same problemJust recently did the final fix. Installed a 3 tube aluminum radiator from Ecklers it is a Champion Brand welded unit some modifications were necessary. Retained the 180 stat, no more overheat at all. 95 degree day stopped in trafic stays at 195 degrees. The car is now a suoer daily driver,,With the horsepower increase to 300 the single tube radiator can"t cut it.. Radiator was 215.00 every other trick dosen"t work

8 out of 8 people think this is helpful.

IsTiming gear stripped behind timing cover.

Your Answer

Add photo

Related Questions

  • c4 Corvette Isolation Relay headlight. Need some help!!! Please 3 answers

    Need to know where the c4 corvette Headlight Isolation Relay is located? I'm changing out my driver's side due to my headlight clicking after I shut down the lights. Need to know exactly where the I...

    1988 Chevrolet Corvette


    Maintenance & Repair


    When running w/ the air off, neither fans run, causing the motor to overheat. with the air on, both fans run, and the temp is normal. fuses is good, i have taken the car to 2 places, neither can fin...

    1995 Chevrolet Corvette Coupe


    Maintenance & Repair

  • 1990 C4 Corvette starter heat issue 10 answers

    I have read multiple articles regarding to heat issue with the starter. My C4 will not start after running it for a while. If I wait 20 minutes or so, it will start. I am contemplating replacing the...

    1990 Chevrolet Corvette Convertible


    Maintenance & Repair

  • '89' Corvette with 350 engine. 3 answers

    I had starting issues with this car. It would start and run for 3 seconds and then die off. Had to do this 3 or 4 time before it would remain running. I had an error code for the Mass Air Flow Sensor....

    1998 Chevrolet Corvette Convertible


    Maintenance & Repair

  • 1986 corvette overheating problem. 25 answers

    My corvette is overheating after replacing the gaskets on the intake manifold and cleaning everything else out. I replaced the thermostat, fuel injectors, IAC. I put it all back together and it starts...

    1986 Chevrolet Corvette Coupe


    Maintenance & Repair


Looking for a Used Corvette in your area?

CarGurus has 20,537 nationwide Corvette listings starting at $3,499.


Search Chevrolet Corvette Questions

Chevrolet Corvette Experts

#1 John Carson
John Carson
Reputation 2,170
#2 carGrrl
Reputation 1,360
#3 Vincent Parker
Vincent Parker
Reputation 1,240
View All

Related Models For Sale

Used Chevrolet Camaro
136 Great Deals out of 35,100 listings starting at $1,995
Used Ford Mustang
333 Great Deals out of 45,576 listings starting at $2,000
Used Porsche 911
98 Great Deals out of 4,448 listings starting at $11,900
Used Dodge Viper
438 listings starting at $24,995
Used Ford F-150
2,403 Great Deals out of 210,248 listings starting at $895
Used BMW M3
62 Great Deals out of 1,886 listings starting at $6,999
Used Mercedes-Benz SL-Class
61 Great Deals out of 3,085 listings starting at $3,500
Used BMW 3 Series
1,064 Great Deals out of 34,784 listings starting at $900

Used Cars For Sale

2017 Chevrolet Corvette For Sale
4 Great Deals out of 10,412 listings starting at $44,711
2016 Chevrolet Corvette For Sale
10 Great Deals out of 1,827 listings starting at $42,999
2015 Chevrolet Corvette For Sale
12 Great Deals out of 706 listings starting at $39,900
2014 Chevrolet Corvette For Sale
7 Great Deals out of 779 listings starting at $38,995
2013 Chevrolet Corvette For Sale
7 Great Deals out of 341 listings starting at $26,982