97 4.6 Overheating
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Joined: Jun 2004
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97 4.6 Overheating
I know there has been alot of this lately. I am sorry for asking again, but I'm stumped. My truck begins to overheat at 40 MPH. If I continue, it will go limp. If I back off it goes back down. It stays normal just under 40, but as soon as it get's over, up it goes. A coworker suggested that the water pump impeller might be slipping on the shaft, but I have no seeping. There seems to be no leaking at all. The AC doesn't seem to make much difference and turning on the heater doesn't seem to either. I thank you for any help!!
Matt
Matt
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Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
Well, the fan clutch seems to be working if it stays cool at lower speeds, so usually the culprit is a partially clogged radiator or one that has too much build-up on the tubes internally to transfer the heat out of the coolant. I just went thru this on a 97 Dodge, except he ended up cooking the engine. It was fine around town, stayed about 200, then on the highway it kept creeping up until the gauge pegged. After I replaced the engine, with a new water pump, it did the same thing until I replaced the radiator.
Perhaps a local radiator shop can boil it out and it will be ok.
Perhaps a local radiator shop can boil it out and it will be ok.
