Ok, I just finished up fitting and getting the proper clearance on the main bearings. Crank has been freshly turned to .02
on both mains and rods with .02 new bearings. Crank turns smooth by hand. Started in on the rods and pistons. I plastigauge
the rod bearing and have .002 clearance. When I go and turn it by hand, it turns smooth. What got my attention is when I
turn the crank so the piston is either at the most upward position or downward position, the bearing has small amount of
slop as the stroke moves in the opposite direction. There is a small clunk. I can recreate it by finding the point and
moving the crank ever so slightly back and forth. Checked several times with Plastigauge and is still remains .002. I can
move the bearing cap with my hand perpendicular to crank and make that same noise. Its a very small amount of slop. I
decided to take a shim out and it was at .015 but to tight to turn crank. My thought was to "fine tune" the bearing by
filing a small amount at a time to get closer to .017-.019 clearance and maybe reduce the amount of slop I am
seeing/hearing.
Is this a problem? I am worried if I left as is, it would make knocking sound when I get it all put together and running.
I rather look at the details now vs me tearing it all apart again. Any guidance or suggestions will be much appreciated.
You may need a nap after reading this long winded explanation! Thanks again
on both mains and rods with .02 new bearings. Crank turns smooth by hand. Started in on the rods and pistons. I plastigauge
the rod bearing and have .002 clearance. When I go and turn it by hand, it turns smooth. What got my attention is when I
turn the crank so the piston is either at the most upward position or downward position, the bearing has small amount of
slop as the stroke moves in the opposite direction. There is a small clunk. I can recreate it by finding the point and
moving the crank ever so slightly back and forth. Checked several times with Plastigauge and is still remains .002. I can
move the bearing cap with my hand perpendicular to crank and make that same noise. Its a very small amount of slop. I
decided to take a shim out and it was at .015 but to tight to turn crank. My thought was to "fine tune" the bearing by
filing a small amount at a time to get closer to .017-.019 clearance and maybe reduce the amount of slop I am
seeing/hearing.
Is this a problem? I am worried if I left as is, it would make knocking sound when I get it all put together and running.
I rather look at the details now vs me tearing it all apart again. Any guidance or suggestions will be much appreciated.
You may need a nap after reading this long winded explanation! Thanks again