lq9 block l92 heads gaskets? - LS1TECH

Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9
Sponsored by:
Sponsored by:

lq9 block l92 heads gaskets?

Thread Tools Search this Thread
Old 05-03-2010, 08:25 AM   #1
Teching In
Thread Starter
Join Date: Dec 2008
Posts: 6
Default lq9 block l92 heads gaskets?

What head gasket to use with l92 heads on a lq9 block. I used new ones from gm and they started leaking. Put on felpro's and now there just started leaking. I'm torque'n them down to 70 ftlb with arp headstuds.
ls1 monte is offline   Reply With Quote
Old 05-03-2010, 11:26 AM   #2
TECH Enthusiast
iTrader: (6)
Join Date: Aug 2002
Location: Readsboro, VT
Posts: 529

You should be using LS3/L92 head gaskets. LQ9 head gaskets will protrude into the combustion chamber on LS3 heads. If you keep having leaks, I'd take a close look at your cylinder head and block deck surfaces to make sure that they're flat, and smooth enough for the MLS gaskets.
Jim85IROC is offline   Reply With Quote
Old 05-03-2010, 07:48 PM   #3
iTrader: (4)
SweetS10V8's Avatar
Join Date: Jun 2004
Location: Michigan
Posts: 2,583

I have an LQ9 with L92 heads. You need to use # 12610046

SweetS10V8 is offline   Reply With Quote
Old 05-04-2010, 10:16 AM   #4
TECH Enthusiast
iTrader: (2)
cutlass_455's Avatar
Join Date: Aug 2008
Location: Alberta, Canada
Posts: 617

You could try a 'bandaid' and get some of that copper spray can sealant and spray the decks on the block and head and see if that helps you out.
cutlass_455 is offline   Reply With Quote
Old 05-04-2010, 02:39 PM   #5
LS1Tech Sponsor
iTrader: (14)
Join Date: Feb 2009
Location: Lubbock, TX
Posts: 2,262

Most people go on with the assumption the head works on the block so the stock 6L head gasket will also work. AND in the GMPP page that SweetS10V8 posted it shows the 6L gasket for the L76, which is completely wrong. They have the LS3/L92 head on them so they need that larger gasket and the GM Parts catalog shows the 6.2 gasket for them also. If you get a cometic head gasket or a fel pro or any aftermarket, they need to be at least a 4.085 bore to be safe.
Beau@SDPC is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
lq9 with l92 heads what head gasket to use acechevy Generation III Internal Engine 3 06-08-2015 08:44 AM
Head gasket leaking after install.. TXjeepTJ Generation III Internal Engine 21 03-17-2015 01:17 PM
LQ9 with L92 Heads Questions... SquareBodyTruckGuy Generation III Internal Engine 14 09-04-2014 03:25 AM
LQ9 With L92 Heads head gasket Question Quick99TransAm Generation IV Internal Engine 1 12-19-2010 09:18 AM
L92 Head Gasket and other ??? racecar Generation IV Internal Engine 5 07-26-2007 07:03 PM

48, casting, fel, gasket, gaskets, gm, head, heads, l76, l92, l92heads, lq9, ls2, mast, pro

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off

All times are GMT -5. The time now is 06:41 PM.