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Re: GM 3100 oil? In coolant. Dexcool sludge
Posted to Technical Theory Forum on 8/7/2018 1 Reply

I would be more inclined to think that the oil is from a slowly leaking trans cooler past or present, than from actual engine oil. That particular engine doesn't have many possible places for oil and coolant to mix, and where they do exist coolant pressure is ... Login to read more.

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