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What head gaskets with 15-17 PSI

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Old Apr 13, 2008 | 06:59 PM
  #21  
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Originally Posted by Dunn
I get my gaskets for $23.00
mmhmmm same here
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Old Jul 25, 2008 | 01:13 PM
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Originally Posted by camarols1
Your local dealer is on crack!!!

Ask for a price on two of part number #12610046, the list price is $37.84 each. This is the 5-layer GM MLS gasket for an 6.0/6.2 engine.
Keep shopping until you get a realistic price.
will these gaskets work for a .030 over bored 6.0?
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Old Jul 26, 2008 | 10:26 AM
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MLS for me, 16 psi pump gas on the street.
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Old Jul 26, 2008 | 10:50 AM
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I've always ran GM MLS gaskets. I have presurized the coolant system before and the car will still run with the MLS gaskets.

Right now I have the 6.2 5 layer gaskets.

I know KP has them on his car and they are holding up so far as well.

Glenn
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Old Jul 26, 2008 | 12:09 PM
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If these gaskets are that good, and Ive heard nothing but good, what gasket would I need to use to run an LS1 stock bore bottom with 317 heads? Or do they even make them for what I'm wanting to do?
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Old Jul 26, 2008 | 02:25 PM
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They make an 5 layer MLS for a stock 3.90 bore, if you search I think the part number can be found on the site.
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Old Jul 26, 2008 | 03:15 PM
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Head gasket is something you don't want to skimp on. I have Cometic gaskets.
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Old Jul 26, 2008 | 03:25 PM
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We use the GM MLS head gaskets on my 402, which has seen 20 psi without any problems. We've had more problems with Cometic gaskets than we have had with the GM gaskets, maybe we were just unlucky though. Bob
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Old Jul 26, 2008 | 04:13 PM
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Originally Posted by 02EBZO6
They make an 5 layer MLS for a stock 3.90 bore, if you search I think the part number can be found on the site.
Thanks!
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Old Jul 26, 2008 | 09:25 PM
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Hummer, make sure you get the bigger 6.0 or 6.2 gaskets due to the head you are running.

Glenn
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Old Jul 26, 2008 | 09:31 PM
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Originally Posted by Lawnboy
What head gaskets with 15-17 PSI ?

I have a set of the GM mls 02-04 zo6 head gaskets that are suspose to be good, I will be using ARP head studs.

I was thinking of the Cometic Phuzion LS1 boost head gaskets , they are expensive but are suspose to prevent head gasket failer in event of head lifting.

whats do you think?
Bad idea! Huge waste of $, they lasted about 5 dyno pulls. Use the GM.
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Old Jul 26, 2008 | 11:00 PM
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Originally Posted by W8N2SQZ
Hummer, make sure you get the bigger 6.0 or 6.2 gaskets due to the head you are running.

Glenn
Why would this be advantageous? Does the 3.90 bore gasket cause a shrouding effect on the combustion chambers if you run it with the 317 heads? Whoops if this is the case...pretty sure I ran a 3.90 gasket with stock 317s and a 3.903 bored cylinder. Oh well....hopefully this won't prove to cause any issues or make any noticeable difference in power. I would think you'd want the 3.90 bore gasket due to more gasket material between the cylinders on the motor side compared to a gasket that has less material between the cylinders...
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Old Jul 27, 2008 | 02:18 AM
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Why would this be advantageous? Does the 3.90 bore gasket cause a shrouding effect on the combustion chambers if you run it with the 317 heads? Whoops if this is the case...pretty sure I ran a 3.90 gasket with stock 317s and a 3.903 bored cylinder. Oh well....hopefully this won't prove to cause any issues or make any noticeable difference in power. I would think you'd want the 3.90 bore gasket due to more gasket material between the cylinders on the motor side compared to a gasket that has less material between the cylinders...
I have heard of people having issues running the 3.90 bore gaskets with the 317 heads. You would have to do a search to find out the sealing issues some of the other members have come accross.

The extra gasket material you speak of will not do anything for you since it is not sandwhiched between the block and the head, and left exposed from the larger chamber on the head.

Let us know how your set up works out.

Glenn
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Old Jul 27, 2008 | 02:23 AM
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So are the 6.2 gaskets and the 6.0 gaskets the same? which ones would work for a 4.030 bore?
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Old Jul 27, 2008 | 07:41 AM
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Originally Posted by W8N2SQZ
Hummer, make sure you get the bigger 6.0 or 6.2 gaskets due to the head you are running.

Glenn
Thank you Glenn, thats the info I was after.
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Old Jul 27, 2008 | 09:05 AM
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Originally Posted by W8N2SQZ
I have heard of people having issues running the 3.90 bore gaskets with the 317 heads. You would have to do a search to find out the sealing issues some of the other members have come accross.

The extra gasket material you speak of will not do anything for you since it is not sandwhiched between the block and the head, and left exposed from the larger chamber on the head.

Let us know how your set up works out.

Glenn
Hmm..well that really sucks. Local shop flubbed I guess. I could've sworn I gave them the 6L gasket number and they supplied this on the receipt - "12498544". This was last December - I remember them telling me to run this gasket with a 3.903 bore bottom end with the 317 heads. Oh well...hopefully it'll hold 10-12psi ok...time will tell I guess. I'd planned on retorqueing the heads after the first dyno pull on 8 lbs, would this be advised/beneficial or just leave them be?

Sorry to ***** hummer, I'm just stressin now that this thing isn't gonna last longer than break-in now
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Old Jul 27, 2008 | 09:33 AM
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Originally Posted by Syclone354
So are the 6.2 gaskets and the 6.0 gaskets the same? which ones would work for a 4.030 bore?
6.0 MLS gaskets are 3-layer with a 4.039" bore.

6.2 MLS gaskets are 5-layer with a 4.100" bore.

Someone please correct me if i'm off a little.
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Old Jul 27, 2008 | 12:12 PM
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No problem Hummer, your black TA looks mean. With all the goodies on that car, it should move! It will be interesting to see how well your 6 speed did.

02- I tried searching last night to see what other have experienced and the search was lacking. Today I came up with this, but you should be able to search for more info.

https://ls1tech.com/forums/showthrea...=mls+heads+317

Hopefully everything works out for you.

SS1-I am not sure but I think you are right on the sizes. However you can run both gaskets on the 3.90 bore. I have run both, but have not boosted the 6.2's hard yet.

Glenn
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Old Jul 27, 2008 | 12:27 PM
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Originally Posted by 02EBZO6

Sorry to ***** hummer, I'm just stressin now that this thing isn't gonna last longer than break-in now
Thats cool man, its not my thread anyway. Guess I'm the post ***** lol!

Originally Posted by W8N2SQZ
No problem Hummer, your black TA looks mean. With all the goodies on that car, it should move! It will be interesting to see how well your 6 speed did.


Glenn
Thanks again, I"ve already decided as soon as the T56 gives me any trouble I'm going to a th400 with a T-brake. Sticks are fun to drive but not always best for the job.
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Old Dec 4, 2008 | 09:06 PM
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I need to know if a stock bore 6.0 can run the 5 layer gaskets and the thickness when compressed
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