symptoms of lifting head?

Reply Subscribe

Thread Tools

Search this Thread

Jun 6, 2004 | 12:19 AM

#21

Pro Stock John

LS1Tech Co-Founder

iTrader: (34)

Joined: Nov 2001

Posts: 45,363

Likes: 1,796

From: Chicago, IL

I run the MLS 6.0 head gaskets, got the idea from Harlan, my longblock is similar to his setup from a year ago.

Jun 6, 2004 | 04:39 AM

#22

1dirtyZ

Thread Starter

8 Second Club

iTrader: (1)

Joined: Nov 2001

Posts: 3,697

Likes: 1

From: the not so stock tribe

thanks for the info, any idea on the thickness of the MLS gaskets?

Jul 22, 2004 | 07:17 PM

#23

Billiumss

TECH Addict

iTrader: (11)

Joined: Nov 2001

Posts: 2,975

Likes: 15

From: Erie, PA

I'd like to know too...

Jul 22, 2004 | 09:03 PM

#24

MYTURBOT/A

TECH Resident

Joined: Aug 2003

Posts: 948

Likes: 0

From: orlando, florida

The rad cap is suppose to be under pressure if it isn't the cooling system won't work right. FYI the 6.0 head gasket thickness is .055 according to GM.

Jul 22, 2004 | 10:15 PM

#25

MelloYellow

TECH Fanatic

Joined: Nov 2001

Posts: 1,986

Likes: 1

From: Centrifugal City

Just had this same problem with Cometic MLS's on my new motor.
They are off and will never touch my car again.

Also had an earlier Cometic failure after 1 year on motor.
They just don't always seal up well.

Am using GM MLS from now on.

Last edited by MelloYellow; Jul 23, 2004 at 02:29 AM.

Jul 22, 2004 | 10:29 PM

#26

MYTURBOT/A

TECH Resident

Joined: Aug 2003

Posts: 948

Likes: 0

From: orlando, florida

When I was getting ready to do my head swap i talked to cometic and they said themselves that they were having sealing problems with there HP gaskets and were working to resolve it. So i went with the stock MLS.

Jul 23, 2004 | 02:30 AM

#27

MelloYellow

TECH Fanatic

Joined: Nov 2001

Posts: 1,986

Likes: 1

From: Centrifugal City

Oops, sorry for saying HP (edited).

My problems were with the Cometic MLS also.
I threw my HP in the trash and they never went on either engine.

Even the Cometic non-HP series have been a nightmare for us lately.
I've never heard of a problem with the GM MLS tho.

Jul 23, 2004 | 07:55 AM

#28

1point3liter

TECH Regular

Joined: May 2003

Posts: 404

Likes: 0

From: Jacksonville, FL

Off topic of the lifting heads...

If you're hearing ticking up top (possibly detonation), have you tried running race gas to see if it clears up?

LS1 Tech Stories

The Best V8 Stories One Small Block at Time

6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'

Brett Foote

Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Pouria Savadkouei

Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Verdad Gallardo

7 Most Reliable High-Performance Engines GM Has Ever Built

Verdad Gallardo

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

Verdad Gallardo

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

Jul 23, 2004 | 08:08 AM

#29

stealth

TECH Resident

Joined: Nov 2002

Posts: 868

Likes: 0

Quote:

Originally Posted by 1dirtyZ

so what are the symptoms of a lifted head?

We've got a master's degree in lifting heads off an LS1. The first and most obvious symptom would be blowing coolant into, and out of, the collant reservoir, and perhaps finding coolant splatter in the engine compartment.

Jul 23, 2004 | 02:26 PM

#30

MelloYellow

TECH Fanatic

Joined: Nov 2001

Posts: 1,986

Likes: 1

From: Centrifugal City

Pressurized Coolant, ie: Coolant Loss, Blowing into Coolant Reservoir, Boiling Radiator Cap, Coolant out exhaust, Popping Freeze Plugs out of your heads (fun).

Reply Subscribe