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Re: GM 3100 oil? In coolant. Dexcool sludge
Posted to Technical Theory Forum on 8/7/2018 7 Replies

Sounds like failed head gaskets. Remember oil is at high pressure on average (45-50 psi) engine speed. Coolant never get above 12-15 psi at any time at that depends on engine temp. The head gaskets get weak near an oil pressure journal and you will get oil in ... Login to read more.

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