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Another wild speculation on my part is that what you are seeing in your oil is not mud but the mud colored oil as a result of water from within the engine somwhere getting down into your oil...a warped head from driving it hot into the big puddle?

I think your right. My coolant is low and upon changing the oil it was pertty dilluted with what appears to be coolant. Changing the gasket and head (if necessary) wont be a prob but ive never seen a manual for a 2.0. has anyone? i would only need torqe specs. is there a standard torque for those bolts? any help would be great.

89 K5 Blazer,TBI 350, 700R4, 6" lift, 40" groundhawgs,3/4 ton 14 bolt rear, 3/4 ton 10 bolt front, 4.88:1 Gears