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Is my dad's '92 sedan overheating? He has air con but the belt is off and it isn't functional otherwise...

When idling for a few minutes the temp gauge will get maybe 3/4's of the way up. The fan does come on though. It cools back down when he goes to drive it.

He was asking if the radiator should be rodded and if the engine should be flushed. Is this normal? Bad thermostat? Or should he go ahead and have those things done?

 
Rep Power: 0

its the radiator cap that needs to be replaced. its lose and no good and is losine pressure... u can get the from autozone for like 10 bucks or a good one for like 25 on ebey