Multi-layer steel head gasket

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YELLOW 94

Founding Member

Nov 19, 1999

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17

Rio Rancho NM

Jan 23, 2007

#1

• Jan 23, 2007

• #1

I ordered a set of these MLS head gaskets and I am worried that they might not seal correctly. The direction state that the surfaces finish on the block needs to be 10-30 average roughness. How would I check this, is anyone running these head gaskets. If you are I would appreciate some info. The block was just zero decked and the heads were resurfaced so the both surfaces are true.

later
Orlie

 

ProKiller

Founding Member

Apr 26, 2002

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78

PA

Jan 23, 2007

#2

• Jan 23, 2007

• #2

put them on and bolt down the head

when i put on my cometics i didn't do anything special/different than a normal head gasket

 

divit250r

Member

Mar 31, 2005

314

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16

Columbia City, IN

Jan 23, 2007

#3

• Jan 23, 2007

• #3

The shop that machined your stuff would be able to tell you what the surface roughness is, if they had measured it after resurfacing. Most likely though they didn't unless you asked them to. I believe you need a profilometer to check surface finish and that's not something most shops, etc... would have. The tool and die shop I work for has one, but it's not something you'll find in a garage. Hope that was some help and not useless info. lol

Scott

 

pwcracer

Founding Member

Jun 13, 2000

347

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16

Hastings, MN, USA

Jan 23, 2007

#4

• Jan 23, 2007

• #4

I ordered the cometic mls gaskets and they too told me I had to have the block machined to a specific finish. This scared me so i sold them on the forums and went with the Ford racing graphite gaskets, which have held up well. (Although I didn't get a chance to use my KB blower much due to it failing)

 

OrangeMustangGt

Founding Member

Mar 7, 2002

1,976

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36

Cape Cod, MA

Jan 23, 2007

#5

• Jan 23, 2007

• #5

i used felpro mls gaskets...very similar, and i just cleaned the head real good, using 3m scotchbrite, and used some copper spray also....no problems for about a year now

 

MattZ281LE

Founding Member

Feb 6, 2000

345

1

19

Purcellville, Va

Jan 25, 2007

#6

• Jan 25, 2007

• #6

A word about head gaskets such as Cometics/SCE or other MLS solid type. If installed correctly they will not blow. So if you have a blower ENSURE you are running a tune that will NOT detonate . The piston will give up before this style of gaskets.......I know this from experience. Easier and cheaper to replace a HG than a piston.

 

Wi Stang

Member

Jun 27, 2004

248

0

16

Fountain City, WI

Jan 26, 2007

#7

• Jan 26, 2007

• #7

I've been running the Cometic gaskets for 2 years without any issues.
When I put in my H/C/I and blower, I just cleaned up the surfaces really good, and slapped them on.
I suppose if both the block and head surfaces have had a little work done to them, I would try and find out from the machine shop how smooth the surface is.

 

ProKiller

Founding Member

Apr 26, 2002

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PA

Jan 26, 2007

#8

• Jan 26, 2007

• #8

MattZ281LE said:

A word about head gaskets such as Cometics/SCE or other MLS solid type. If installed correctly they will not blow. So if you have a blower ENSURE you are running a tune that will NOT detonate . The piston will give up before this style of gaskets.......I know this from experience. Easier and cheaper to replace a HG than a piston.

Click to expand...

thats the reason i didn't o-ring my block when DSS wanted me to....