Question about 2004 Dodge Ram

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2004 overheating at highway speeds

I have a 2004 dodge with 4.7 that overheats at highway speeds put cools down at slower speeds

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I had a 4.7 doing the same thing, it was the radiator had clogged up at the bottom. So, when you hit highway speed it could not cool down fast enough. The reson i a putting a comment on a old post because if anyone seaches and pulls this up at least they can find a resolve.

Posted on Jul 05, 2012

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Check rad cap & check your rad hoses for one that may feel soft & collapsing & restricting flow under higher speeds. Sometimes you can see it **** in when you rev engine in park. Especially lower hose.

Posted on Jun 27, 2009


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Need more input. If it over heats all the time, you could have a bad thermostat,, collapsed hose, stopped up radiator or radiator low on water. If it overheats at slow speeds but cools down when you ge to highway speeds, you may have a problem with th the fans and/or sensors.

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When does it overheat? At idle, or at highway speed? Is the coolant level where it should be? Overheating at idle or highway speed may be a faulty thermostat. If it overheats only at idle then it is likely a cooling fan fault. To determine if the fan is working start the engine and switch the A/C on, the fan should come on, if it does not, then you need to have the computer "scanned" to see if it can detect the reason for the fan not coming on. If the fan is switching on, then you need to have the water pump checked to see if in fact it is pumping coolant (this could also be the cause of overheating at highway speed) If you are overheating only at highway speed you may want to have the enigine checked for a blown head-gasket, or faulty radiator.

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I have a 2002 Dodge Durango SLT 4.7 that has been overheating. It overheats at Highway speeds about 60+ and then it cools down when I start to slow down. Also it overheats faster when I run the AC or the...

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Have a 93 Ford escort. when i drive down the highway, car heats up, when i drive slower it cools down. What causes that. Ialso seem to be losing warwe somewhere

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