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Old 01-13-2006, 02:13 PM
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Default Gasket thickness

Does anyone know the compressed thickness of the MLS 6.0 gasket?
Old 01-13-2006, 04:44 PM
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I have seen a couple of different numbers myself so I am interested in this answer as well. Are these for your Dart heads?
Old 01-13-2006, 05:28 PM
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That's why I'm asking; I've seen 3 different thicknesses stated, and my chevy dealer "has no idea"!
VN
Yes this is for the Darts. They said to go with a 6.0 so I'm looking at some options. (I like the MLS)
Looks like we're running into some of the same questions on these heads. Let me know when you hear some #s. I am still impressed with the way these heads look. I think they're going to perform really well!
Old 01-13-2006, 06:16 PM
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Nope. ME three.

I bought a graphite Felpro gasket to see the difference between that and my Cometic .040 and the graphite one gave me a squish difference of .014", so the graphite is .054"

I think the mls is .051" but not certain.
Old 01-13-2006, 06:38 PM
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Do you know the part number of the MLS? I had e-mailed Gunnar at Patriot because I know they distribute this gasket with their heads. Here was his reply, but I am not sure if it is the MLS gasket.

4.00" bore, .055" compressed, 12569365.
Thank you,
Gunnar Bowlin
Patriot Performance
888-462-8276
www.Patriot-Performance.com

Last edited by vettenuts; 01-14-2006 at 07:12 AM.
Old 01-14-2006, 06:34 AM
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A part # I got from here on the forum was a 12589227 fo rthe 6.0. I'm not 100% sure if that's correct. My Chevy dealer here in town is kinda out of it
Old 01-14-2006, 07:13 AM
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From what I understand, there are two versions of this gaskt an MLS one and a graphite one. I haven't figured out which is which though
Old 01-14-2006, 09:57 AM
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Old 01-19-2006, 04:08 PM
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I am going to TTT in hopes someone has the part number for the 6.0 GM MLS gasket.
Old 02-10-2006, 09:09 PM
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According to a couple of sponsor web sites, the 6.0 MLS gasket P/N is 12589227. I'd like to know the compressed thickness and inside diameter myself. I'm running a pair on my truck now and I should have checked them with my calipers for diameter at least before I installed them last spring. Of course, compressed height is much more difficult to measure with any accuracy.

Steve

Steve
Old 04-18-2006, 01:41 AM
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Originally Posted by Steve Bryant
According to a couple of sponsor web sites, the 6.0 MLS gasket P/N is 12589227. I'd like to know the compressed thickness and inside diameter myself. I'm running a pair on my truck now and I should have checked them with my calipers for diameter at least before I installed them last spring. Of course, compressed height is much more difficult to measure with any accuracy.

Steve

Steve
TTT
Just checking again, does anyone have this information?

Thanks,

Steve
Old 04-18-2006, 08:34 AM
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Originally Posted by vettenuts
Do you know the part number of the MLS? I had e-mailed Gunnar at Patriot because I know they distribute this gasket with their heads. Here was his reply, but I am not sure if it is the MLS gasket.

4.00" bore, .055" compressed, 12569365.
Thank you,
Gunnar Bowlin
Patriot Performance
888-462-8276
www.Patriot-Performance.com

This is the MLS head gasket we did send with our heads. It is .055" compressed.
Old 11-12-2007, 11:53 PM
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Originally Posted by Steve Bryant
TTT
Just checking again, does anyone have this information?

Thanks,

Steve
Search works....


did you ever find the compressed thickness of 12589227's?
Old 08-24-2008, 08:25 PM
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...and what is the gasket bore for this one?
Old 08-29-2008, 09:24 AM
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Supposed to be 4.039" bore, but if you look at Summit they list it as 4.020".
Old 08-29-2008, 11:57 AM
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cometics thicknesses https://ls1tech.com/forums/generation-iii-internal-engine/977927-mls-head-gasket-thickness-vs-strength.html
Old 02-14-2010, 10:17 AM
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"Part# 12589227
LS2 / L76 Cylinder Head Gasket. Single unit, required two per engine. .051"" thick, 4.02"" max bore. Standard LS head bolt pattern."



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