well my sister has a 92 toyota corrola and for some reason bubble are coming out off the overflow tank. After a while of driving it will "overheat". I think that is is a headgasket that has a leak in it. We thought that the fans wern't turning on to cool it cuz it would only overheat after driving for a while. what do you guys think?

 

my car did the same thing ;it was a headgasket;could also be a cracked block or head

 

my fan dosent turn on at all, but never has overheated from drivin. it shouldnt. so im sure thats not the problem

 

thanks guys. I am doing the headgasket next week

 

Compression check?

 

Do more investigating before you just toss a hg on. Could be the water pump if it does it while driving, bad thermostat or something else smaller, check around before tearing it apart.

 

bubbles in the coolant = head gasket.