4.2 vs. 4.0 Piston Size (measurements)
Posted: November 22nd, 2010, 7:19 pm
just doing a size up in my block to see if rings come down too far and interfere with an imperfection in the lower cylinder wall that I'm going to try and have a machine shop grind away.
I still have the old 4.2 pistons pressed to the 4.2 rods so I bolted them up to the crank but noticed there is a lot of slap.
the pistons look almost identical from top the bottom even the pin height looks to be the same but the diameter must be different.
am I correct in "testing" ring land area with a 4.2 piston just as a temporary solution until I get the 4.0 pistons pressed to the 4.2 rods?
I still have the old 4.2 pistons pressed to the 4.2 rods so I bolted them up to the crank but noticed there is a lot of slap.
the pistons look almost identical from top the bottom even the pin height looks to be the same but the diameter must be different.
am I correct in "testing" ring land area with a 4.2 piston just as a temporary solution until I get the 4.0 pistons pressed to the 4.2 rods?