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03-20-2012, 04:32 PM
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#1
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,695
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LS1 head gaskets
Quick question- did GM make more than one type for the LS1? If so, can I run different kinds? Need to replace one, and don't know which one to order as there are multiple listed on SDPC's website. The one I found on LS1tech is part number 12573949. Can anyone help confirm if this is correct? My local dealer is useless, I'd rather circumvent them and confirm here. I trust you guys more than them.
Thanks
Jake
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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03-20-2012, 10:11 PM
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#2
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Join Date: Dec 2008
Location: Garwood NJ
Posts: 221
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Early LS1s used a composite gasket, later ones were built with MLS gaskets. I am pretty sure that center bolt heads can use either style, but perimeter bolt heads require the composites.
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Artie
73 Camaro 25.3 build TT LS in progress
67 Camaro
99 T/A
Other crap not worth mentioning
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03-20-2012, 10:36 PM
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#3
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,695
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Thanks Artie, that answers it. I need the MLS gasket.
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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03-21-2012, 05:24 PM
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#4
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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I think the composite and MLS gaskets also had slightly different compressed thicknesses. I wouldnt mix and match the two types, but it sounds like you originally had MLS gaskets on your car, so replacing 1 head with MLS would be fine.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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03-21-2012, 10:52 PM
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#5
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,695
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Quote:
Originally Posted by KirkEvil
I think the composite and MLS gaskets also had slightly different compressed thicknesses. I wouldnt mix and match the two types, but it sounds like you originally had MLS gaskets on your car, so replacing 1 head with MLS would be fine.
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The head gaskets were replaced by TTP, so I'm assuming they used MLS gaskets if those are the newer style.
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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03-22-2012, 09:02 AM
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#6
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10 Second Club
Join Date: Feb 2008
Location: Eatontown
Posts: 1,647
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Quote:
Originally Posted by qwikz28
The head gaskets were replaced by TTP, so I'm assuming they used MLS gaskets if those are the newer style.
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From what I remember, the MLS head gaskets have a small (metal) tab that sticks out between the head and block you could look for to verify.
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1999 C5 FRC: 12.7@114
2008 TBSS: 12.48@108
2017 Silverado 2500 do you even lift breh?
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03-23-2012, 09:28 PM
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#7
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13 Second Club / Moderator
Join Date: Jan 2005
Location: Franklin Lakes, NJ
Posts: 8,695
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Thanks Kirk. It's definitely the MLS.
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Quote:
Originally Posted by LS1ow
Except Jersey mike, great kid, but the way he looks at me makes me feel like im in danger
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03-24-2012, 11:39 AM
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#8
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Join Date: Jul 2009
Location: barnegat nj
Posts: 1,340
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yours definetly takes mls
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Quote:
Originally Posted by SRGN
I never pulled into the staging beams at the track and saw a dyno in the other lane.
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South Jersey Racecraft
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04-03-2012, 06:44 PM
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#9
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What?
Join Date: Nov 2009
Posts: 411
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Ohhhh yeahhhhhh,dawg breath...
I HAVE A NEW SET IF U NEED THEM..... 
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YELLOW BULLET,WHER THE ''WEAK ARE EATEN''
STOP THE ''BITCH IN,  BAAAAD
BOOTS TO ASSSES, IF U CAN SMELLLLLLLLLLLLL,WHAT THUNDER IS-SPAYYYY-IN..  .. RIP, MIKE ROMEO..TUNE,BY DALE CHERRY,INJECTION-CONNECTION..""SHAZAMMMM""
THE FAMOUS ONE215-675-8515 ,AND STEVE SPOHN,and j&g-transmisstions,willow grove,pa,215-659-3022,, R.I.P.JOE PRINCE..
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