Here's a page that outlines the procedure, along w/other related info and links.What is best way to determine ( 0 ) lash and adjust valves in Hydraulic lifter S/B Chevy?
and why the ole timers say to drop the lifters into a coffee can of oil overnight..Here's a page that outlines the procedure, along w/other related info and links.
Finding zero lash is easier to do if you jiggle the push rod up and down instead of twisting it between the thumb and fingers. The problem w/twisting is the lifter plunger can be compressed past zero lash and you won't feel it in some cases- especially if the lifters haven't been pumped up yet.
Unless you really tighted down the rocker, I doubt this is your problem. Hydraulic lifters can take quite a bit of preload, solid lifters won't. Sounds more like a timing issue. Of course, double or triple checking valve lash is always advisable in any event. Good luck :thumbup:We used the twisting method to determine zero lash and it didn't seem to work. The engine had back fire through the throttle body which we think means the intake valves were adjusted too far and spit the fuel back. Going to try the up & down method today and hope for good results. Thanks.