At first, it would overheat after 20 mins of driving. I thought it wassomething wrong w/the thermostat as if it wasn't opening up at a certain temp. I replaced it, but noticed that the old thermostat was perfectly fine. After replacing it, it still would overheat. The technician that works at the repairshop that my car is being held at said that the waterpump gave out which caused it to overheat. I replaced the waterpump, and the radiator. But, at that point it was already too late. When it was overheating before the waterpump was replaced, the head seals couldn't handle the excessive heat and caused it to blow. It was hard to find it at first, then the technician pointed out the compression leak by the exhaust
manifold. So, when you drive the car it seems really boggy, as though it's not getting the right compression.

******* gasket. how much has been damaged by the overheating?

 

It depends on how bad it overheated. If you drove the car while it was overheating then it could be bad. If not you might just need a new head gasket.

 

yeah my corolla is acting the same way... I finally just said forget it, and let it die... it's 23 years old, completely stock... don't get me wrong, it still runs strong and all but its gonna die any day now...