Looking at a truck 2005 with a fresh rebuild 11k on it. Customer states truck started knocking hard after climbing a big hill with a heavy load. Metallic knock to scary to describe! Pulled the head thought is was a dropped seat. #4 Cylinder is oily in exhaust port and piston has Valve indents! Everything else is clean and perfect. My question is I know the pan has to come off but I want to confirm a wasted rod bearing first. so was going to dial indicator the pistons to see if there is a major difference. Is there anything else I'm missing or should check? The truck is bone stock nothing on it.
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