Checking Valve Lift

[Rory McNeil]

Originally Posted by Alan Roehrich

You really want to get anything like that in writing. You also need to know that NHRA uses their own lifter if they're checking a participant's lift. It may or may not be the same height as the one you have.

I'm not sure Travis can post on this, since if he posted on an official question, it may be construed as an official answer.

Not always, in 2004, when I had to tear down my 85 Mustangs 302, our Div.6 Tech team did not have a SB Ford hyd. roller lifter in their kit. I had to dissasemble one of my lifters, and plug it so they could check the cam. (Later I made up my own checking lifter.) As for lash/preload, since they check with a solid lifter, I would imagine that any drag on the pushrod while turning it would indicate "zero lash".