Posted ByJim on February 22, 2002 at 16:53:03:
In Reply to: Re: SB CHEVY VALVE ADJUSTMENT. posted bykris on February 22, 2002 at 01:32:33:
: : I HAVE A HYDRAULIC CAM AND LIFTERS.
: this is a subject i have much experience with as i have been a chevrolet master and
: ASE master technician for 14 years. the chevrolet service manual states " one turn
: past zero lash, for hydraulic tappets ". this also apples to a 'roller' tappet. to obtain
: zero lash, first the tappet must be on the base circle of the camshaft lobe. while
: turning the push rod with your finger and thumb, tighten the rocker arm nut until the
: push rod cannot be (gently) turned . then continue to tighten the nut one complete
: turn, and the valve is adjusted properly according to the book. now, it has been my
: experience after several years of turning wrenches professionally, that one complete
: turn is usually too tight and will cause an engine misfire. i have always gone 3/4 turn
: and have NEVER had a problem. i hope this helps.