by Baron » Wed Feb 23, 2011 1:01 am
Hard to tell positively according to your description, but if I'm reading it right you're talking about the "yoke" at the base of the piston where it attaches around the crankshaft via a "U" shaped fitting that fits from the bottom and bolts to the yoke of the piston. If that's the case, then you have bad rod bearings. I have replaced them on an engine simply by dropping the bottom piece, which leaves the rod loose in the cylinder. You can then put new rod bearings in and fasten everything back together again. Seemed to work for me, but I'm no experienced mechanic so I don't know if that is the best way to do it for the long run. I just needed a quick fix at the time.