Question about 1991 Chevrolet Corsica

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'91 Chevy Corsica bad thermostat?

Corsica was driven 120 miles to us for purchase. no problems with it, owner had topped off coolant (it was from the cold high country and driven down on a chilly weekend morning) just prior to driving down. Upon picking it up and driving away, on surface streets the thermostat temp started going up rapidly upon stopping in traffic. Didn't actually overheat until 2 days later during driving (right close to our driveway so car wasn't driven "hot" for very long at all). Added water the next morning, tried to start, wouldn't quite turn over. Any ideas we can try to check at home prior to going to a shop? Thanks!

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  • Cynister1 Jan 20, 2009

    it's actually a close family friend who had been driving it regularly in their (much colder) town without the overheating problem. Not likely someone who is intentionally screwing us over ;-) We only gave them $200 up front and they only wanted another $150 later; it was a kid's car and they just needed the cash out of it to buy parts for a new vehicle. Like I said, my godnephew had been driving it for several weeks, no overheating.



    Is it worth replacing the thermostat? Or would thermostat not present these problems?

  • Cynister1 Jan 20, 2009

    will try bleeding the air out tonight!! I think they just filled the radiator full of coolant before driving it down the mountain to us....

  • Cynister1 Jan 20, 2009

    rather... i will try bleeding the air out IF the car will start. have not been able to do so since the minor overheating... it "tries" but doesn't quite turn over...

  • Cynister1 Jan 22, 2009

    took thermostat off car this morning, placed in hot water and there was no reaction so appears to be bad. getting a replacement. Car would not start this morning still; tries to turn over but never does. Would a bad head gasket prevent it from starting up at all? It cranks, just never actually turns over....

  • Cynister1 Jan 27, 2009

    And the verdict is in: Cracked engine block and at some point there was/is a radiator leak as they found radiator fluid in the cylinders.



    so now, it's parts :)

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If i hadn`t have read all on the subject i would have thought the thermostat was bad and the battery was week it diffently sounds like they seen you coming even a good used motor is going to cost alot unless you know some one that junks that may not have a salvage license that would give you a good motor for the price of its weight under the table of course.that person wont loose out because you can give him your old motor.

Posted on Sep 05, 2009

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Could be a bad thermostat or Temperature Control sensor which controls the fans when the car eeaches a certain degrees. With the car stopped. run to operating temperature until it gets hot. The fans should come on by themselves. If thy dont't it is the temperature control sensor. Do not run the car or overheat the car.. Check coolant/antifreeze level. If low, refill and bleed the radiator and coolant system. By filling up the radiator with 1/2 and 1/2 water /coolant. Run engine . let cool until it can be handled. Very carefully turn radiator cap using thick gloves or bundled up rag. let the air out. Some cars have a bleed bolt(very small) at the outlet from the thermostat to bleed the air out. Either way will do.Repeat until radiator is full.

Posted on Jan 20, 2009

  • Daniel Arellano
    Daniel Arellano Jan 27, 2009

    Check your timing belt. If the crankshaft turns real fast, faster than normal, the timing belt may have broken. make sure you are recieving fuel and have spark at th spark plugs. Your car would start even with a bad gasket.If the cylinders fire up.

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It sounds like you got sold a lemon..the guy knew it had problems and passed them on to you...i would contact him and ask for a refund of the money spent on the car.you can send it to a shop but i dont know that they will be able to tellyou much other than maybe a bad alternator and a stucj thermostat or leaking water pump.

Posted on Jan 20, 2009

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Check for external coolant leaks pull the dipstick look for dis-colored oil.. sounds like either a bad headgasket or a problem with the cooling fan or system..

Posted on Jan 20, 2009

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