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Re: GM 3100 oil? In coolant. Dexcool sludge
Posted to Technical Theory Forum on 8/7/2018 5 Replies

How are the rocker arms oiled? If not by the push rods, I would assess that the rust in the coolant is being perceived as oil. I have seen several BOP (Buick, Olds, Pontiac) motors that have this issue Login to read more.

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