Re: Overheating-1941 120

Posted by BigKev On 2025/3/14 6:40:43

Other culprits in no particular order:

Partially plugged exhaust
Incorrect timing
Partially plugged water distribution tube
Water pump impeller clearance too large causing cavitation
Lower hose partially collapsing internally
Blown head gasket leaking combustion heat/exhaust into the coolant

I've had a car with a blown head gasket do the above. It ran like nothing was wrong, but would overheat eventually. It basically pressures and heats the coolant, which then causes the coolant to boil over, loosing coolant. Which then makes it over overheat even futher.

Is it actually boiling over? Never trust the gauge inside the car. Use one of those IR (laser) Thermometer to check the temp at both the front and rear of the engine, and top of radiator.

If the back is significantly warmer, that usually indicates a plugged water distribution tube.