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my 92 toyota celica is overheating...and the heater has stopped working. I've replaced the radiator...after I found a leak. replace the thermostate switch in the radiator, and have check most of the related electrical components...and still can't find the problem. Do you have any suggestions as to what could be wrong? I was wondering about the ignition timing...if it is off... what problems would be associated with that? Thankyou for any help that you can give.
Answer -
Do the cooling fans come on when reaching operating temperature?
Was the thermostat also replaced?
It could be a blown headgasket, you can have it tested at any repair shop or Toyota dealer for this.
How long does it take to overheat and how far on the gauge does it go?
I'm on vacation now and can't get back to you until late monday.
In answer to your questions. No the cooling fans do not come on when reaching operating temperature. The thermostate has not been replaced. I took it out and tested it to see if it worked. I thought that it was ok. Even so I just bought a new one to replace it as soon as I can, just to be sure. The car takes about 10 minutes untill it is overheating...maybe a little more. When that happens that gauge goes all the way into the red zone. If it was a blown headgasket would the car still run? And wouldn't there be signs of oil and coolant mixing?
AnswerTry disconnecting the cooling fan temp sensor, it's located on the bottom of the radiator when you disconnect the sensors the fan will run all the time with the key on, see if the overheating stops, if it does replace the temp sensor.
The engine will in most cases still run even with a blown headgasket, remove the oil cap, or even better, remove the valve cover, if the headgasket has been leaking the oil will not look like oil if water mixed with it, it will look milky almost like chocolate milk.
