Hi, I have a 1987 toyota corolla gl sedan and it has overheating issues. The temp gauge will go up quickly and then spike to red and beyond (as far right as possible i believe) this can sometimes drop down to the middle within seconds and stay there for the rest of the day. Other times it will stay red zoned, so i turn the engine off and let it cool. Possibly a blocked radiator? / sensor/ thermostat? help :)
Sounds like you have a leaking cylinder head gasket, have a shop run further diagnostics.
SOURCE: antifreeze ts boiling back into reservoir.
it sounds like a possible head gasket problem,you can get the fluctuation from combustion gases getting pumped into your cooling system and creating gas pockets,i would suggest taking it to a shop and have them do a block test to look for combustion in the cooling system to confirm the problem,that way you will know for sure,if it comes up negative they can also perform a flow test to make sure there is no restriction in the cooling system such as a plugged radiator or a bad thermostat,hope this sheds a little light on it
Testimonial: "I bet you've hit on the problem ! Car has been "using " antifreeze for a couple years now, with no leaking anywhere. Lost through the head gasket ?"
SOURCE: i noticed two days ago that the a/c cooling system
Sounds as if the electric fan on the radiator isn't coming on. Most radiator shops also work with A/C systems and may be more qualified to do the work. However, any good "normal" repair shop should also be able to diagnose the problem. Try not to drive it very far and keep close watch on the engine temperature. An overheat can do extensive (expensive) engine damage. If you have a fill cap on the radiator, fill it there (when cooled down) filling the recovery bottle may not be sufficient to get coolant into the engine.
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