Posted by pete 23 on December 01, 2020 at 20:55:54 from (45.52.57.204):
In Reply to: Farmall 400 questions posted by super99 on December 01, 2020 at 18:41:15:
Rear seal is behind flywheel in a two piece retainer so split is necessary to replace.
Rings can take quite a bit of taper, maybe 5 0r 6 thousands but the top ring groove is really important. With new ring max side clearance is .006 with no visible ledge in groove. They can be regrooved and spacer installed above ring.
Piston skirts should be measured to see if any have collapsed . If you see any ridge on bottom of ring travel you are probably done.
I would do a compression test putting some oil in cylinder and if it changes psi considerably you can be sure rings are leaking or better yet a leak down test .
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