Valve wear.
#1
Valve wear.
I had my rockers off the other day and noticed a few of my valve ends aren't wearing evenly with the others. My understanding is the tappet is slightly offset of the center of the valve which causes the valve to rotate when it applies the down stroke force. So I have three valves that have rotated less than half way in ~100miles. How bad should I worry about this? Is there anything short of Machinist voodoo that would solve it?
EDIT: Sorry. On a R series engine if that wasn't obvious.
EDIT: Sorry. On a R series engine if that wasn't obvious.
#3
SF is the pre 88 oil rating
f1 at .10% f2 at .12%. API grades are 0.10% max.