Overheat on highway - Ford Powerstroke Diesel Forum
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Old 07-19-2010, 07:12 PM
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Overheat on highway

I have a 90 7.3 with a 10" lift and 37" tires and lately it has been overheating everytime I get on the highway for a couple miles or more at a time. When I am on back roads or just taking it easy around town, it never overheats. I noticed that the top radiator hose is collapsing when it starts overheating. I replaced the top hose and the tstat and it still is doing the exact same thing. Does anyone have any ideas? Thanks for any help
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Old 07-20-2010, 09:00 PM
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Is the radiator full? Almost sounds like fluid isnt circulating?

Thad
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