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Piston clearance

B

Brad Franken

Guest
Had my 2 1/4 United running for about 30 min. I think maybe it needs a bit more piston clearance. With a 4" bore what do you think the max piston Dia. should be? I had a new sleeve installed & it measures exactly 4" The piston is 3.994 Thanks Brad
 
K

Kevin A. Behnke

Guest
The clearance should be good for cast iron pistons. I have had in the past, tighting of the piston pin retaining bolt will distort the piston enough to create a tight spot on the piston. If this happens use prussian blue to find the tight spot and file off the high spot.
 
M

mark

Guest
you should have .003 to.005 clearance.check at the skirt 90 deg from the wrist pin
 
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