Question about 2003 Chrysler PT Cruiser

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Radiator cap allows overheated fluid to backpressure reservoir

2001 PT has 54k miles and is overheating.
No smell at exhaust, oil is clean, antifreeze looks clean.
Air temperature around 95' hiway driving with ac on gauge will flicker up then down, then into the red quickly.
I stop imediately and observe that no fluid is escaping except thru the reservoir cap. Heater works and upper hose is too hot to touch.

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Sounds like a sticking thermostat (temp up/down).
In an emergency, you can remove it, but replace it soon.

I otherwise suspect the radiator fan, but it shouldn't overheat if you are on a highway going faster than 50mph (enough air blows through the engine compartment).

Everything else you describe does not indicate any other solution.

I suppose it could be the radiator fan RELAY SWITCH or loose wire to it.

Hope this helps....

Posted on Sep 10, 2009

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Posted on Jan 02, 2017

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