the_merv

iTrader: (88)

What are the signs of this..if they are too short or too long?

kinglt-1

iTrader: (26)

If the pushrod is incorrect legnth, the rocker will not be center on the valve tip. take the rocker off, mark the tip of the valve with a sharpie, then install the rocker, rotate the engine a few times, unbolt the rocker and inspect the wipe pattern.

the_merv

iTrader: (88)

Thanks..i'm just trying to check everything before I get the Engine completely back together.

I guess there is probably a specified pre-load aswell..and if it's too long then it would probably be noticeable.

kinglt-1

iTrader: (26)

I think stock rockers are tq to 22ftlbs... not sure on aftermarket?

kinglt-1

iTrader: (26)

http://www.gmhightechperformance.com.../photo_06.html

this writeup might help ya for aftermarket rockers.

nichoms

iTrader: (1)

I think preload, at least on the newer LS7 Lifters, is like 0.060" to 0.100" so there is a little wiggle room in there. I set my preload at 0.080"

With proper length and preload it should be reasonably quiet.

Pushrod length is easy to measure and pushrods are easy to replace so you might as well measure and make sure you've got the correct length.

And yes, the rocker arms require 22ft lbs