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Old 12-22-2008, 03:59 PM
777stickman 777stickman is offline
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Re: 98 7.4L Crew Cab Dually losing coolant into overflow tank?

From your post I would suspect the radiator cap is either faulty or not on tight.

Or the radiator itself in that area.

If you're concerned about head gaskets the 1st thing is to pull all the spark plugs and to see if there is any coolant contamination on any of them.

If none of this helps then you should have the whole system pressure tested.
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Last edited by 777stickman; 12-22-2008 at 04:45 PM.
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