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1994 Toyota Pick-up 4-cyl. overheating

I have had a recurring problem with overheating. I thought it was just the thermostat, but have replaced it more than once and it did help. Months back, when the vehicle had sat for a few days, the engine would not idle smoothly for a few seconds when first started but then would smoothe out. I thought it might be a leaking head gasket, whereas coolant was leaking into a cylinder. I had a pressure test run at a shop and they could not find a leak and of course I see no sign of coolant in my engine oil. Just for kicks I flushed out the system and added a head gasket stop leak formula which cleared up the problem for several months, but now with the hot Summer months the elevated temperature guage has started again. I am not having the rough idle though when I first start the engine as I had before though.
The guage now stays pretty normal doing interstate speed, but when I slow down, the temp begins to rise and resises still further upon stopping. Do you think the problem could be in the fan clutch? Not turning the fan fast enough to keep the radiator cool?

Thanks!

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I had the same problem and i replaced my fan clutch and it stayed cool at all times. that's is the problem.

Posted on Jul 08, 2009

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