The method suggested by Thomas is a good one. Problem is a lot of guys don't have that extra valve cover to toast by cutting. Nor do they have a way to cut it. Anyway, if you try it don't rev the motor with the cut cover on, I did and had to clean oil off the inner and outer fenders plus my glasses for my mistake. Also Thomas make another good point, You might think about ditching the lash adjustment method by Haynes. I lost a new cam (CompCam) with less than 3,000 miles to the ZDDP problem and flat tappets. Other than somehow measuring the movement of the rocker/valve or pulling the cam out, I don't know how to check for a flat cam. Very interested to finding out if there is a way for a shade tree mechanic like myself.
