by KE4AVB » Tue Aug 28, 2018 10:25 am
Looks can be deceiving that why they make micrometers. Sorry they are NOT the same bore. I have both new gaskets in stock here.
310000 [31 cu in] series is 3.6325 and the 330000 [33 cu in] series is 3.7725 at the cylinder opening on the gasket; of course, my mic has sharp edges so the graphite gives a little. Putting a 31 gasket on 33 can have the piston hitting the gasket plus have very gasket failure between the cylinder and the push rod galley and a 33 on 31 can lead to very early gasket failure between the cylinder and the push galley.
Edit: Added info just to make the point clearer.
310000 Standard cylinder bore is 3.563 in. (90.50 mm)
330000 Standard cylinder bore is 3.701 in. (94.01 mm)
The truest measure of society is the how it treats its elderly, its pets, and its prisoners.