quote:Originally posted by Bosswrench:
FWIW, I hot-adjust my engines while they're running. Slide a feeler gauge between the rocker wheel & valve stem while manipulating an allen wrench for the internal setscrew. Follow immediately with a box-end wrench to lock down the setscrew about 1/8-turn, as humans cannot tighten the setscrew tight enough to hold more than a few seconds. Tightening the locknut will change the lash, so you can see this isn't easy to do "perfectly". It may not matter much, either.
It doesn't sound like you have ever adjusted the lash on en engine equipped with Jesel rockers like Mike's engine has. The lash is adjusted at the pushrod cup NOT at the center like a standard roller rocker. There is a billet steel stand which bolts to the head. There are two smaller studs which are part of the stand that go through two holes in the rocker shaft .
Ron