How much valve lash?

Reply Subscribe

Thread Tools

Search this Thread

Mar 10, 2005 | 11:22 PM

Hotrod God

Thread Starter

Staging Lane

Joined: Oct 2004

Posts: 97

Likes: 0

From: Grand Blanc, Michigan

How much valve lash?

I just got a set of Comp Roller Rockers (PN 1375-16) and I'm getting ready to bolt them on. I think I heard that .020 is the proper gap to set for valve lash. Can anyone tell me if this is correct? If not what is the proper gap? Thx.

Mar 11, 2005 | 12:34 AM

PREDATOR-Z

TECH Senior Member

Joined: Mar 2004

Posts: 14,620

Likes: 17

From: BFE

0 (zero) valve lash and then torq for spec lifter preload.

Mar 11, 2005 | 08:35 AM

Hotrod God

Thread Starter

Staging Lane

Joined: Oct 2004

Posts: 97

Likes: 0

From: Grand Blanc, Michigan

I have a set of Comp Pro Magnum lifters to go along with the rockers. Should I call Comp to find the Lifter preload?

Mar 11, 2005 | 09:06 AM

PREDATOR-Z

TECH Senior Member

Joined: Mar 2004

Posts: 14,620

Likes: 17

From: BFE

.008">.010" preload with a dial indicator (cold) with Pro Mags. I would go .010.

Make sure you clean the lifters with mineral spirit (to remove cosmolene coating) and soak them in oil for a few hours

Mar 11, 2005 | 10:30 AM

Unaffliated Racing

Registered User

iTrader: (15)

Joined: Nov 2002

Posts: 873

Likes: 1

Quote:

Originally Posted by PREDATOR-Z

Dead nut! .008"-.010" cold... .002"-.004" hot. People get confused thinking lash and preload are the same..they aren't..two different things. You only have lash on soild type camshafts and the lash they require depends on the lobe profile.