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The white smoke could be valve stem seals. The overheating could be a partially blocked radiator. Don't bother trying chemicals to clean it out. Take the radiator to a shop and have them professionally clean it. could be a blowen head gasket!

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2007-08-26 04:51:14
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Q: After you replaced water pump thermostat and both fuel filters on a 1986 Ford F-250 diesel and is overheating and has white smoke while idling or let of gas what could be wrong?
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