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

PushRod advice

Thread Tools
 
Search this Thread
 
Old Jan 31, 2009 | 12:11 AM
  #1  
zx9rgreen's Avatar
Thread Starter
On The Tree
iTrader: (18)
 
Joined: Jan 2006
Posts: 175
Likes: 0
From: Wetumpka, AL
Default PushRod advice

Just finished up my buildup and the engine has some valvetrain noise. It has new lifters and .105" preload. That preload is with 7.4 length, should I swap the PRs for the 7.35? Would that quiet down the noise or make it worse?

My question is which is better and why..... 0.055" or 0.105" preload?

LS7 lifters
Reply
Old Jan 31, 2009 | 06:54 AM
  #2  
vettenuts's Avatar
TECH Senior Member
iTrader: (4)
 
Joined: Jul 2004
Posts: 8,092
Likes: 13
From: Little Rhody
Default

I think the preload is fine and not the source of you noise. 7.375" is also available as an option. Trend has them on the shelf and they also make them for Comp, which are more money and harder to find.
Reply
Old Jan 31, 2009 | 07:53 AM
  #3  
zx9rgreen's Avatar
Thread Starter
On The Tree
iTrader: (18)
 
Joined: Jan 2006
Posts: 175
Likes: 0
From: Wetumpka, AL
Default

Originally Posted by vettenuts
I think the preload is fine and not the source of you noise. 7.375" is also available as an option. Trend has them on the shelf and they also make them for Comp, which are more money and harder to find.
AH....Texas Speed doesn't list that length on their website. Thanks
Reply
Old Jan 31, 2009 | 08:35 AM
  #4  
vettenuts's Avatar
TECH Senior Member
iTrader: (4)
 
Joined: Jul 2004
Posts: 8,092
Likes: 13
From: Little Rhody
Default

It is available. Or, you can call Trend pushrods as they have them and make them for a lot of vendors, including Comp. I needed 7.475" and couldn't find them anywhere, Trend had them to me in two days.
Reply
Old Jan 31, 2009 | 09:22 AM
  #5  
GMCtrk's Avatar
TECH Senior Member
iTrader: (23)
 
Joined: Jul 2004
Posts: 9,853
Likes: 0
From: Houston, TX
Default

I got a question for you all. I've got an LQ9, with some 317 heads milled to 68cc (from 71) ready to go on, stock cam. I currently bought some 7.4" hardened pushrods. Will these work ok?

Last edited by GMCtrk; Jan 31, 2009 at 09:31 AM.
Reply
Old Jan 31, 2009 | 11:32 AM
  #6  
zx9rgreen's Avatar
Thread Starter
On The Tree
iTrader: (18)
 
Joined: Jan 2006
Posts: 175
Likes: 0
From: Wetumpka, AL
Default

Originally Posted by GMCtrk
I got a question for you all. I've got an LQ9, with some 317 heads milled to 68cc (from 71) ready to go on, stock cam. I currently bought some 7.4" hardened pushrods. Will these work ok?
I would think so.....
Reply
Old Jan 31, 2009 | 12:41 PM
  #7  
GMCtrk's Avatar
TECH Senior Member
iTrader: (23)
 
Joined: Jul 2004
Posts: 9,853
Likes: 0
From: Houston, TX
Default

Originally Posted by zx9rgreen
I would think so.....
I don't know exactly how much was milled off the heads but Im guessing about .020" so the pushrods would effectively be 7.42". I've been told the stock pushrods are 7.395".
Reply




All times are GMT -5. The time now is 07:37 AM.

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