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Re: Coolant Pressurization Duramax: Diagnostic help
Posted to Technical Discussion Forum on 3/20/2012

Max,

Tell him to start it up cold and see how long it takes for the upper hose to get hard. If it happens fast, as in 2 minutes to a rock hard hose, he has head gasket issues. With the cast iron block and the aluminum heads, the expansion scrubs away at the ... Login to read more.