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Re: Oil in cooling system - GM 3.1 V-6 'J or M'
Posted to Technical Discussion Forum on 9/5/2007

Hi Scott,

I'm doing a '91 Bonneville 3.8L intake reseal right now for oil in the coolant.

I just pulled the old intake gaskets off of the heads, and you can see where the oil has been "wicking" along the white (rubber?) sealing bead of the gasket all the w... Login to read more.