I'm told I NEED a thermostat in my 1991 Toyota Celica ST, I've had other cars (older) and only needed the thermostat in the winter for heat. I'm having alot of trouble with the car overheating and

Asked by Aug 07, 2012 at 03:45 PM about the 1991 Toyota Celica ST Coupe

Question type: Maintenance & Repair

2 Answers

68,725

Computer controlled cars, like yours, must reach operating temperature (usually 195° F) to run correctly. So a thermostat is needed year round. Even in the old days cars needed thermostats to prevent sludge build-up in the crankcase. HTH. -Jim

2 of 2 people found this helpful.
35

Check your heater core if you have changed the water pump and thermostat Sometimes the radiator hoses collapse when they Are older

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