I bought my car with what was assumed to be a bad rod knock. The more I drove it it seemed to be more of a stuck valve. I just got the oil pan down and I'm starting to think it's not a rod. All the rods are tight with no wiggle.. There is a small amour of side to side lash but the bearings all seem good. Are these motors known for main bearings going bad?? I don't have the inverted torques at home to pull them off. I'll proceed to pull rod caps and look at the bearings just to be sure but I'm leaning more tords mains now. Kinda sucks. I was hoping to do some polishing and swap rod bearings and get some more miles before I need to do a swap.