Don't Hate Me another valve lash Question
Don't Hate Me another valve lash Question Ok, Changed heads, Cam, lifters, Got the Comp pushrod checker. Found Zero lash on several valve locations, reset checker to that length pushrod tightened rocker arm down all came down to 1 1/4 turns +or - I came up with 7.350 pushrod with .100 preload Just checking before I order pushrods
Thanks for looking
Thanks for looking
Last edited by shoeboxvette; Aug 24, 2015 at 12:42 PM. Reason: incorrect wording
Ya I'm a little confused here lash is what's used to determine the play between the rocker and the valve. Preload is how much the pushrod is pushing on the lifter, two very different things.
You want to find zero lash then check the length of the checker like you have done and then add whatever preload you want. It's a non adjustable hydraulic roller, there is no lash. With that said if you are using stock ls7 lifters I would shoot for .07 preload. You can run more and you can run less but that's a good medium. With that said 7.35 seems short unless you have head work or something else done
You want to find zero lash then check the length of the checker like you have done and then add whatever preload you want. It's a non adjustable hydraulic roller, there is no lash. With that said if you are using stock ls7 lifters I would shoot for .07 preload. You can run more and you can run less but that's a good medium. With that said 7.35 seems short unless you have head work or something else done
Stock rockers with trunion upgrade, GM hot cam, 243 heads, ls7 lifters, .051 head gasket. 6.800+ 9 X .050 .450 + .100 Preload 7.350 with this from zero lash to tight it took 1 1/4 turns on the trunion bolt.
The stock 7.400 pushrods were almost 2 complete turns zero lash to tight
The stock 7.400 pushrods were almost 2 complete turns zero lash to tight
Yeah. If your sure your on base circle on the rocker your checking. Eoic. I snugged up the rocker bolt till the pr could spin but no up and down play. Then I tightened up the rocker till 22ft. Lbs. And had 1.25 turns. That is what you want. 1.25 to 1.50 turns to reach 22ft. Lbs. After valve lash.
Someone correct me if I'm wrong, but thats how I did mine shoebox.
Someone correct me if I'm wrong, but thats how I did mine shoebox.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
