Honda Civic Repair Question
Temperature gauge acting up again!........
The pressure of the system exceeds the cap rated pressure and the antifreeze goes in to the overflow. That is not the problem, the problem is why the engine seems to overheat. Does the fan run? When was the thermostat replaced last?
3,798 answers provided
I've seen bad water pump with coroded propeler. This happends if you use pure water instead of coolant.
Worse case head gasket is blowned.
When engine is cold open radiator cap. Place pan for collant under the front of the car, run the engine with open radiator cap. If you see air bubles when engine is cold, then head gasket is blown.
But sometimes you have to run engine until it gets hot and parts expands to create this problem.
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