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How do I tell if it's the intake manifold gaskets? Also, if it cools down when driving, wouldn't that indicate the radiator is not slugged up?

I just tested the AC, and the fans did NOT come on. They DO come on when the temp gauge hits the red. Does that indicate a relay or sensor should be changed? How do we diagnose the manifold gaskets? Do I monitor the coolent level? I have not seen any smoke and the engine remains cool when...

Thanks for your feedback. I THINK the fans come on when the AC is turned on. I'll have to double check. I only checked before with the AC off (and the fans only came on when very hot on the gauge) Will confirm to the board tomorrow. Thanks again for the ideas.

The fans only come on when the temp gauge hits the red. I'll have to double check which engine it has. I was not aware there were optional engines. It's actually my parent's car. It was low on antifreeze. All the new mechanic did was top it up and he thought it helped. He thinks it will need a...

Hello everyone - this is my first post on the forum, thank you in advance for your collective knowledge and insight. I have a 2000 Olds Minivan that is overheating. The shop has replaced the thermostat which seemed to be the cure initially. Now 4 weeks later, it's overheating again. When I am...