I have a 2000 toyota camry Le, 2.2L, 4 cylinder. Recently I have been having some overheating problems with my car. I have been doing a rather extensive amount of research at to what my problem could be, and these are my attempts to fix the problem.
First: Noticed that when idle the engine temperature needle begins to climb after a decent amount of time on the road (2 - 3 hours around ~2000rpm). And eventually red lines if not tended to.
Second: This does not occur while driving, due to free flowing air passing through the radiator. This leads me to believe that there is no blockage within my radiator.
Third: I have been able to remedy the situation by turning on my heater at full blast to pass air through my heater core and cool the engine. And also when I turn my A/C on to force the radiator fans to turn on and cool the radiator.
Fourth: Radiator fans do not turn on automatically when the thermometer needle begins to climb past halfway.
Fifth: I am able to force the fans on by disconnecting the thermo/fan switch, which connects to the coolant temperature sensor on the bottom of my radiator. But when it reconnects the fans turn off.
Sixth: I have changed all included:
relays to both the fans,
master four pronged fan relay,
ECT sensor/fan switch on bottom of the radiator,
ECT sensor on outgoing coolant near engine and next to thermometer,
Flushed and replaced coolant at least three times now.
I have no idea why my fans won't turn on automatically and why my engine continues to overheat. My last possible hypothesis could be that I have a short in the wires somewhere. But wouldn't that keep the fans from turning on entirely?
Friday, June 27th, 2014 AT 2:21 PM