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Old 07-23-2011, 05:42 AM
FireRanger FireRanger is offline
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Default Re: engine overheating?

Doubt the thermostat is the culprit if the AC is exasperating the symptoms. I suppose its possible it is stuck not opening all the way but this would be extremely rare.

Having the AC running basically is pre-heating the air that goes through the radiator reducing the amount of heat it can dissipate. If that is actually causing a problem then it could be:
- Low coolant level. On a cold engine, the radiator should be full when you look inside and the tank should be 1/2 full.
- Failing water pump not moving enough volume to dissipate the heat.
- Clogged old beat up radiator not dissipating enough heat
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