Not sure why my last replies haven't been approved but upon removing the lower intake manifold I do think it could have been the oil/ coolant mix. Or rust from running water or both. I wasn't getting milkshake at my oil fill cap or in radiator but there was some around the coolant ports on my heads. The gasket was the original plastic one that fails. Even some of my intake manifold was chewed away where it meets against the head..like something had eaten away at the metal. Someone really neglected this car
