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Old 05-29-2006, 07:29 AM
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rocker adjustment ?

yep, another rocker adjustment question :-/

i adjusted my comp pro-mags yesterday. opposite valve full open. set to zero lash, 1/3 turn. all seemed to go well. but when i was done, i noticed many of the pushrods seemed a little loose. no slop, but i could turn them. i am thinking that the lifter just bleed down some. and after starting the engine, oil pressure will make things right. hydrolic lifters.

so, is it common for the slightly loose pushrods after adjustment ?

thanx a ton

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Old 05-29-2006, 07:31 AM
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oh-yeah. i did search, but this issue didn't come up.
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Old 05-29-2006, 12:09 PM
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Hey Vortec,
Take the plugs out. Adjust the valves on top dead center/compression stroke. Start at #1 and just turn with a wrench following the firing order.
It's basic,simple and it works.
Intake open do exhaust..exaust closes do intake...TOO EASY TO MESS UP...
I've done rollers with big duration both ways and it doesn't matter.
DO IT THE SIMPLE BASIC WAY... Just my thoughts... have fun
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Old 06-03-2006, 07:43 AM
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ok. i did a search. and came up with the proper way to adjust them.

intake on the way to closing = adjust exhaust.
exhaust just starting to open = adjust intake.

all went well. and they looked to be in the same adjustment as before.

but my question remains.
some of the pushrods are kinda tight. and others are easy to turn.
also. when i was adjusting. some of the lifters would collaps easily, i could adjust with just my fingers. but others i could not do this, needed a wrench to turn the locking nuts.

please advice. thanx
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Old 06-03-2006, 09:51 PM
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adjustment

You have the procedure right, check this out. Chevy hydraulic lifters have a spring inside them. So if you're not sure you adjusted them correctly, back them off and start over. The real key here is spin the pushrod with 2 fingers as you are gradually tightening the rocker nut. As soon as you feel resistance while turning the pushrod, tighten the nut 1/4 turn more and stop. Go to the next valve and repeat the whole procedure.

Helpful Hint: When I am assembling an engine, I always set the valves before installing the intake, that way you can see the actual preload on the lifter. I always try to keep lifter preload around .020 unless special hydraulics recommend something different.

Good luck
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Old 06-04-2006, 08:55 PM
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i started it today. no rocker issues at all. though it only ran for 2 mins, i shut it off. i just wanted to see if it actually ran.

thanx
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