I have just pulled my valve covers off of my car. My rockers have been clacking and making noise. Can someone tell me if I am right or wrong in my thinking. If I tighten the nut on my stud mount rocker arms to the point that the pushrod will not spinn and then I give it my half turn while the cam is not on a lobe then when I pull my valve cover off and feel my rocker arms there should not be play in them. I would think that If they have been set to zero lash then tightend then there would be pressure on the push rod from the spring in the lifter and that would keep the rocker arms from having alot of play. Can someone tell me if I am right?
I need some quick feedback because I want to take my car to the track tonight
- Thread starter tistan2
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TT91
Active Member
no u dont tighten then until they cannot turn, by that point, you have already bottomed out your lifters. Loosen the nut,now spin them in your fingers as your tightening them down, once you feel pressure being applied to the pushrod, STOP! At that point, you dont want to go any tighter. Thats where they need to be. Make sure the nut is snug and move on.
TT91
Active Member
if your using roller rockers, loosen the allen bolt a good way,that is used LAST to secure the other nut. The main adjuster nut, 9/16 i think, is the one you should be tightening while spinning the pushrod. Once you feel the pressure being appiled to the pushrod, meaning it just started getting harder to spin, STOP. give them 9/16 nut 1/4 more turn. then lock the allen head nut down.
sirshureshot that is exactly how I adjusted them. I just don't understand one thing. I tighten to zero lash and give a quarter turn then I completely rotate the engine one full turn and stop back on the same point that I just tightened, but I did not tighten the allen set screw. When I checked the main adjuster nut it was loose. I had to give the nut a full turn with my fingers before it got tight again.
04sleeper
Founding Member
Zero Lash is when a valve is closed all the way. You can spin the motor over by hand until both valves are completly closed for one cylinder. (That way you can adjust 2 rockers at a time). Loosen the allen bolt all the way like sirsureshot39 said. Then tighten the 9/16 nut down with your "Fingers" all the way (with a rag so your fingers don't slip because of oil) until you can't turn it with your fingers any more. Then Take your 9/16" wrench and give them an extra 1/4 to 1/2 turn. (Make sure you do all the rockers them same way). This will give some preload on the lifter. Then tighten down the Allen Lock Screw to lock the nut. You wil notice that when you turn the motor over by hand again that the rockers will still have a little play in them. This is normal because when the lifter pumps up with oil it will tighten them up.
04sleeper
Founding Member
It sounds like you did not have the valves at Zero Lash. You have to keep tightening them by hand as you spin the motor over until the valves are completly closed.tistan2 said:
TT91
Active Member
this thead should be a sticky for "How to adjust valves"..
Tistan2, i replied to you PM, do it that way and like 89sleeper said. Youll nail it the first time with no problems!
Tistan2, i replied to you PM, do it that way and like 89sleeper said. Youll nail it the first time with no problems!
TT91
Active Member
how freakin hard can this be? I downloaded compcams instructions for the install and i followed them to a t. I put my car back together and fired it up. I really should say tried to fire it up. It finally fired and sounded like a f**king harley davidson. I dont know what the f**k is wrong now. I think I am quitting for they day and drinking myself to sleep.
