How much lifter preload comp rockers?
Thread Starter
10 Second Club
Joined: Nov 2007
Posts: 458
Likes: 2
From: Birmingham UK
How much lifter preload comp rockers? I have stock lifters with comp adjustable roller rockers, i have 3/4 of a turn of preload from zero lash, its really quiet when cold but when its hot i get a bit of sewing machine noise, if this is normal then ok, but can i pre load a bit more so it will be quieter? Thanks.
If the studs are 3/8-24 threads then that is only about 0.050" of preload, a little light for stock lifters. 1-1/4 turns will get you to 0.080" if the threads are in fact 3/8-24. I am assuming the adjustment is at the fulcrum, and not at the pushrod. If at the pushrod then my numbers are not correct.
If the studs are 3/8-24 threads then that is only about 0.050" of preload, a little light for stock lifters. 1-1/4 turns will get you to 0.080" if the threads are in fact 3/8-24. I am assuming the adjustment is at the fulcrum, and not at the pushrod. If at the pushrod then my numbers are not correct.
I would adjust for 0 lash then adjust the rockers (loosen) for about .017.
Roughly 1/4 to 1/3 of a turn if your getting .050" per turn.
I used a feeler guage.
I am using the Comp Cams #1500 in my LS6.
What I mean by 0 lash is that you tighten the adjustment till you feel the valve open (a marked increase in force to tighten any further).
The lifter is at a pumped down state.
Some adjust to .005 but usually with solid lifters.
Roughly 1/4 to 1/3 of a turn if your getting .050" per turn.
I used a feeler guage.
I am using the Comp Cams #1500 in my LS6.
What I mean by 0 lash is that you tighten the adjustment till you feel the valve open (a marked increase in force to tighten any further).
The lifter is at a pumped down state.
Some adjust to .005 but usually with solid lifters.
Last edited by heavymetals; Feb 24, 2008 at 07:45 PM.
