LS9 Head Gaskets - 7 Layers?
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
LS9 Head Gaskets - 7 Layers?
Just got mine in today from Summit. I'm not seeing seven layers. There's one metal layer on top, then a bonded layer inside that could be counted as many as three layers I guess, then another metal layer on bottom. They say "FRONT" and "60L" on either side. They are in Genuine GM plastic with part number 12622033. I can post pics if I need to. Seems like they are not LS9's but the part number is correct. 
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Yea I triple checked the part number but I just don't see seven layers. They're also supposed to be 4.100" bore diameter and they measure out to 4.046. ~.050" smaller than spec? 
Starting to think someone packaged these just before their lunch break. Actually they have "made in Germany" tags on them so maybe they were made just after lunch during Oktoberfest.
Starting to think someone packaged these just before their lunch break. Actually they have "made in Germany" tags on them so maybe they were made just after lunch during Oktoberfest.
Last edited by 5 Liter Eater; Jan 16, 2012 at 07:49 PM.
Le Mans Master
Joined: Jul 2005
Posts: 7,121
Likes: 3
From: Shreveport/Bossier Louisiana
St. Jude Donor '08
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
The pics I've seen online also have the 60/62L like Chris'. Hope I don't get and static returning them. Been seeing a lot of incorrectly packaged parts lately.
Safety Car
Joined: Feb 2008
Posts: 3,712
Likes: 3
From: TEXOMA
St. Jude Donor '08-'09
LOL
http://forums.corvetteforum.com/c6-f...t-for-ls2.html
the answer is in one of your own threads... lol
-Carl
http://forums.corvetteforum.com/c6-f...t-for-ls2.html
the answer is in one of your own threads... lol
-Carl
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
OMG!
I was thinking, I know I've seen a pic of one with all the layers spread out. No idea it was in one of my own threads. I never ended up doing anything when I posted that. Just backed my tune off to a reasonable level; no detonation = no water pushing.
I was thinking, I know I've seen a pic of one with all the layers spread out. No idea it was in one of my own threads. I never ended up doing anything when I posted that. Just backed my tune off to a reasonable level; no detonation = no water pushing.
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
Summit should take them back and eat the shipping so no biggy.
Thanks Jeff, I don't need them right away and need to put a list of other GM part #'s I need (pilot, throw out, balancer bolt, real LS9 head gaskets, '06+ AC line, front and rear main seals).
Going to count the links in the timing chain right now...
Thanks Jeff, I don't need them right away and need to put a list of other GM part #'s I need (pilot, throw out, balancer bolt, real LS9 head gaskets, '06+ AC line, front and rear main seals).
Going to count the links in the timing chain right now...
Le Mans Master
Joined: Aug 2004
Posts: 5,972
Likes: 47
From: NCM Lifetime#2195 Bulverde, Texas 78163
St. Jude Donor '13
Is it possible that GM updated the part to the cheaper one? I would check that out first. Lots of GM's parts have gotten cheaper in quality in the past year.
Thread Starter
Le Mans Master
Joined: Aug 2002
Posts: 8,472
Likes: 38
From: Houston TX
St. Jude Donor '11
I don't think so. The bore diameter is different. That link above showed me where to look on the actual gasket for the part # which on mine is 12589227; LS2/L76 head gasket, which is supposed to have a 4.020" bore and I measured 4.046". They are still supposed to be .051" thick, they would work, butthey're going back, I want the LS9's.
Le Mans Master
Joined: Dec 2005
Posts: 6,994
Likes: 1,677
From: Southeast TX
Ahhhh shoot! Parts Taxi shorted me one LS9 head gasket on my last order. To their credit, they next dayed me another one. The gasket that came with the original order is wrong like yours. The one they next day aired to me is correct. Go figure.... I was hoping to put my motor together today. Guess I could run into Houston and pick one up, but they're $25 higher at the dealership.
I was hoping to put my motor together today. Guess I could run into Houston and pick one up, but they're $25 higher at the dealership.
Race Director
Joined: Nov 2001
Posts: 18,682
Likes: 4
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12
Guys let me know where you are getting your "correct" 7 layer LS9 gasket from. Last thing I want is the gasket screwing up my entire build. I am pretty sure my shop will spot it immediately but I don't want them to go thru the hassle so I will order it myself.