I closed the circuit by using a paper clip at the thermoswitch plug, and the fan worked. So, I think the relay is fine, right?
When I open the radiator cap when the car is cool, I could see white residue in coolants. Is that a sign of blown headgasket, oil getting into the coolant system? There are some white smoke out of tailpipe, but not noticeable.
What would it normally cost to fix the headgasket?
Originally Posted by
mberndt
It sounds like the cooling fan is not turning on, and that is causing the motor to overheat...
Did you check the operation of the relay?
Worst case scenario is just wire up the fan to the ignition, so it always stays on when the car is on...
It doesn't sound to me like a headgasket... But I could be wrong... If so, there would be bubbles in the coolant, and some oil residue in the coolant (like an oily film on the surface of the coolant)... Also, some smoke would probably be noticeable out the back...
Here's a quick check, just wire up the fan to the ignition or battery, disconnect the relay, and drive around... If you overheat, then it's not the fan, if you do, then it's most likely head gasket failure...
Good luck!