Lifter Preload Question
Thread Starter
Racer
Joined: Jun 2007
Posts: 266
Likes: 1
From: Mobile Al
Lifter Preload Question
I'm going back on with my newly decked heads and I want to check pushrod length. How do I get the perload out of the lifter before checking for pushrod length?
Thanks....
Jeff Serebrin
Theodore Al
Thanks....
Jeff Serebrin
Theodore Al
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
You will want to add about ~.060 to the pushrod length after zero lash to compensate for preload, this is for LS7 lifters, some have gone as far as .100 more but I think thats high. Piston needs to be TDC on the compression stroke when checking.
Last edited by Corvette Don; Jan 6, 2011 at 01:37 AM.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Not sure if you have a cam but the stock length is 7.385" (gauge length) so removing 0.030" would result in 7.355" or without going custom 7.350" (gauge length). That should ball park your measured zero lash value plus preload. (Note that the stock setups I have measured typically were 0.100" of preload) If you have an aftermarket cam, these values will change.
