Originally Posted By RapidRobert
Originally Posted By Transman
Fastmark - how did you determine how much preload you have ? What method did you use ?
What I do is: with it mocked up, put a swath of dykem on the pushrod, then slide a thin flat razor blade over sideways from the valve cover flange on the head & make a slight mark in the ink then undo the rocker to let everything raise up till the cup "just" reaches the snap ring then make another razor mark then measure the distance between the (2) "marks" on the pushrod.


I’ve done it this way before. I got the same measurements both ways. I fixed the problem yesterday without buying adjustable rockers at he customers request. I settled on .035 to .045 using Shim’s under the stands. It was a royal pain. Way too time consuming just to save the customer money and be a one time fix. I had to use more shims at one end of the drivers side head. Better than .110 to .145 preload though.