Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

Lifter preload?

Thread Tools
 
Search this Thread
 
Old Sep 15, 2003 | 09:54 PM
  #1  
99 TA's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Nov 2001
Posts: 295
Likes: 0
From: Ohio
Default Lifter preload?

So what is the correct lifter preload with YT rockers? Some say zero lash then 1/4 to 1/2 turn and then 22 ftlb. Others say zero lash then 1 and 1/2 to 2 turns then 22 ftlb. Which is it?
Reply
Old Sep 16, 2003 | 12:39 PM
  #2  
99 TA's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Nov 2001
Posts: 295
Likes: 0
From: Ohio
Default Re: Lifter preload?

No one knows?
Reply
Old Sep 16, 2003 | 12:45 PM
  #3  
Visceral's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,865
Likes: 2
From: Portland, OR
Default Re: Lifter preload?

well, it depends very much on which lifters you are using.

If you are using stock lifters, they like more preload. I personally would not go less than about 3/4 of a turn on stock lifters, otherwise I would expect some noise. 1 1/2-2 turns would be fine, I think, but a little more than you need.

For Comp R lifters, I would go with approximately 1/4-1/2 of a turn.

chris
Reply
Old Sep 16, 2003 | 01:03 PM
  #4  
99 TA's Avatar
Thread Starter
TECH Apprentice
iTrader: (1)
 
Joined: Nov 2001
Posts: 295
Likes: 0
From: Ohio
Default Re: Lifter preload?

Well I have the stock lifters. I think the just over 1/4 turn of preload that I have now is not enough and that's why my valvetrain is so noisy.
Reply
Old Sep 16, 2003 | 01:21 PM
  #5  
nuzee's Avatar
11 Second Club
iTrader: (2)
 
Joined: Mar 2002
Posts: 618
Likes: 1
From: Hawaii
Default Re: Lifter preload?

If the YTs are adjustable, then the 22 ft-lbs torque adjustment seems not applicable.
Reply
Old Sep 16, 2003 | 01:57 PM
  #6  
HumpinSS's Avatar
FormerVendor
iTrader: (1)
 
Joined: Feb 2002
Posts: 3,059
Likes: 0
From: Waldorf, MD
Default Re: Lifter preload?

Yeah how the hell do you preload lifters with non-adjustable rocker arms
Reply
Old Sep 16, 2003 | 04:03 PM
  #7  
DanZ28's Avatar
10 Second Club
iTrader: (5)
 
Joined: Nov 2001
Posts: 3,412
Likes: 0
From: Cali/Bay Area
Default Re: Lifter preload?

Yella Tera's are non adjustable. You need shims or you need to buy the right size push rods! I think stock lifters like to have around .030-.050 preload and Comp R's like .010...

Dan
Reply
Old Sep 16, 2003 | 04:08 PM
  #8  
LS1x2's Avatar
Formerly 4mulaJoe
20 Year Member
iTrader: (11)
 
Joined: Nov 2001
Posts: 2,763
Likes: 0
From: hou
Default Re: Lifter preload?

Yeah how the hell do you preload lifters with non-adjustable rocker arms
This is exactly what I have been thinking. Can someone explain this?
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Sep 16, 2003 | 04:27 PM
  #9  
Visceral's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: Nov 2001
Posts: 1,865
Likes: 2
From: Portland, OR
Default Re: Lifter preload?

you have to either put shims under the rocker arm or change the length of the pushrod in order to get the preload right, maintain the 22lbft necessary to keep the rocker there, and keep a reasonable semblance of valvetrain geometry.

chris
Reply




All times are GMT -5. The time now is 02:53 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE