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

GM MLS gasket?

Thread Tools
 
Search this Thread
 
Old Jul 5, 2014 | 02:33 PM
  #1  
TXZ28LS1's Avatar
Thread Starter
TECH Senior Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 6,163
Likes: 3
From: Classified
Default GM MLS gasket?

In the middle of installing my livernois motorsports ls6 heads. The mls gasket part number they gave me is #12589227. It has 6.0L stamped on it. Will this work?

Can i install the gasket as is or do i need to spray them with anything.

Last edited by TXZ28LS1; Jul 5, 2014 at 02:40 PM.
Reply
Old Jul 5, 2014 | 03:13 PM
  #2  
TXZ28LS1's Avatar
Thread Starter
TECH Senior Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 6,163
Likes: 3
From: Classified
Default

Anybody know if ill be fine with these gaskets? Im wondering if they are meant for bigger bore or if they will be fine for my 00 ls1..
Reply
Old Jul 5, 2014 | 04:07 PM
  #3  
KCS's Avatar
KCS
Moderator
20 Year Member
Liked
Loved
Community Favorite
iTrader: (20)
 
Joined: Mar 2005
Posts: 8,859
Likes: 323
From: Conroe, TX
Default

It's common practice to open up the chamber to 4", so they probably did intend for the 6.0L gasket to be used.
Reply
Old Jul 5, 2014 | 05:48 PM
  #4  
RezinTexas's Avatar
TECH Fanatic
10 Year Member
 
Joined: Jun 2011
Posts: 1,343
Likes: 8
From: Katy, TX
Default

just make sure the bore of the chamber is smaller than the bore of the gasket. A light copper spray is sometimes used, won't hurt anything.
Reply
Old Jul 5, 2014 | 10:34 PM
  #5  
.boB's Avatar
TECH Resident
iTrader: (1)
 
Joined: Jan 2014
Posts: 897
Likes: 33
From: Colorado Springs, CO
Default

Modern MLS gaskets are already coated. They are meant to installed dry.

The gasket bore should be as close to the cylinder bore as possible, without extending into the cylinder. The space between the cylinder wall/piston and the gasket is kind of a dead space. The flame front doesn't light that off very well. The bigger that dead space is, the more air/fuel doen't get lit.

You won't notice any difference in feel, but might lose a pony or two. The exhaust gas will read rich, even though it really isn't. And you might have trouble passing an emissions test.
Reply
Old Jul 6, 2014 | 09:16 PM
  #6  
BADD SS's Avatar
10 Second Club
iTrader: (4)
 
Joined: Sep 2005
Posts: 1,103
Likes: 1
From: Baldwin, NY
Default

Originally Posted by .boB
Modern MLS gaskets are already coated. They are meant to installed dry.

The gasket bore should be as close to the cylinder bore as possible, without extending into the cylinder. The space between the cylinder wall/piston and the gasket is kind of a dead space. The flame front doesn't light that off very well. The bigger that dead space is, the more air/fuel doen't get lit.

You won't notice any difference in feel, but might lose a pony or two. The exhaust gas will read rich, even though it really isn't. And you might have trouble passing an emissions test.
True, and gm mls seal pretty good.. That being said, there is a spray that definately helps cometics....
Reply
Old Jul 7, 2014 | 12:15 AM
  #7  
TXZ28LS1's Avatar
Thread Starter
TECH Senior Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 6,163
Likes: 3
From: Classified
Default

Thaks for all your help guys.. my head n cam install went well.
Reply




All times are GMT -5. The time now is 07:29 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