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NEEDED!!! ACTUAL measurements of MLS gaskets

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Old Jul 17, 2008 | 07:46 PM
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Default NEEDED!!! ACTUAL measurements of MLS gaskets

I'm getting all my stuff from the machine shop, and have 2 sets of the MLS gaskets.

I'm checking quench Saturday, and wanting to get some ACTUAL measurements of the MLS gaskets that have been compressed.

I've seen so many numbers thrown around, but none actually verified, just passed down numbers.

If I can't get any feedback and I have to, I'll put a set on, compress them, take heads back off, measure them, and go from there.

Thanks

Moss
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Old Jul 17, 2008 | 07:46 PM
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Default 5.7 MLS gaskets

I need them off the 5.7 MLS gaskets, not the 6.0!

Thanks
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Old Jul 17, 2008 | 08:35 PM
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Per the GM drawing, the 6.0 gasket is 0.052. The 5.7 is about the same plus or minus a few thousandths.
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Old Jul 17, 2008 | 11:37 PM
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.051 for the fel-pro gaskets
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Old Jul 18, 2008 | 05:20 AM
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How soon do you need them? I am pulling and tearing into my engine this weekend. It has .040 cometics and I'll measure the actual compressed thickness for you. The engine has been together for over a year.
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Old Jul 18, 2008 | 01:10 PM
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Default measurements

I was mostly thinking of GM MLS gaskets, but what the hell.......

GIVE SPECS OF ALL ACTUAL MLS GASKETS!

Who know, we may make a popular thread.
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Old Jul 18, 2008 | 01:32 PM
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I have always heard the GM mls gaskets are a .053 compressed
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Old Jul 18, 2008 | 01:39 PM
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GM MLS gaskets for LS1, LS2, LS3, LS6 and L92 are all 1.3mm or .0523 "operating thickness" according to all of the actual blueprints.


LS3, L76, L92 - 12610046 Bore= 104mm, 4.094
LS2, LQ9, LQ4 -12589227 Bore= 102.6mm, 4.039
LS1, LS6, LS4 - 12589226 Bore= 100mm, 3.937
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Old Jul 19, 2008 | 09:32 AM
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Originally Posted by LS1C5Vette
I have always heard the GM mls gaskets are a .053 compressed
I put a caliper on mine after torquing the heads down - got .053". I'd say your in the ballpark with that number +/- .001.
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Old Jul 21, 2008 | 07:03 AM
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Default .053

Yall were dead on the money!

I took a new set of MLS gaskets (5.7 liter not 6.0), put one on my block, torqued down a head on it, pulled the head right back off, put the mic on it,

.053!
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Old Jul 21, 2008 | 09:17 AM
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Thank baby jeebus for this thread, some of the exact info I have been looking for.


Now does anyone know the exact amount that the piston is out of the hole on stock LS1?
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Old Jul 21, 2008 | 01:07 PM
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Default diamond pistons

I don't know the stock set-up, but my new set up is:

Stock length scat h-beam rods
Diamond forged pistons, -2 cc relief 3.905 diameter
Stock stroke crank
Stock block deck height

My piston height was a measured .004" out the top of the hole!

dm
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Old Jul 21, 2008 | 05:34 PM
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Originally Posted by dmoss69
I don't know the stock set-up, but my new set up is:

Stock length scat h-beam rods
Diamond forged pistons, -2 cc relief 3.905 diameter
Stock stroke crank
Stock block deck height

My piston height was a measured .004" out the top of the hole!

dm


thanks for some input.


oh and sorry for the thread hijack too.
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Old Jul 21, 2008 | 06:40 PM
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Stock piston "out of the hole" is -.007 but I have seen ppl post that they have measured more and less.
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Old Jul 21, 2008 | 08:21 PM
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Originally Posted by LS1C5Vette
Stock piston "out of the hole" is -.007 but I have seen ppl post that they have measured more and less.
Thank you sir, the headgasket thickness and piston out of bore numbers were the things I needed to figure up some compression numbers.
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