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head gaskets for the c-460 heads

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Post  badnotch March 22nd 2010, 6:48 pm

what options are there other than cometic ? i know to many people that run them that have had notheing but issues - does MLS make them yet for 4.600 BBF yet ? thanks
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Post  BOSS 429 March 23rd 2010, 12:02 am

1099 fel pro, or if your not using the outer bolts( we dont most of the time, depending on block) you can use others


-rich
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Post  BOSS 429 March 23rd 2010, 12:03 am

ford motor sport also markets one,i can not rem num at this time,good gasket, as is 1099
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Post  badnotch March 23rd 2010, 5:40 pm

thanks
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Post  Lem Evans March 23rd 2010, 7:22 pm

M - multi
L - layer
S - steel
Is a gasket design...not a brand. Others make MLS head gaskets but unless something has changed lately Cometic is the one that makes MLS for the bbf.

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Post  badnotch March 23rd 2010, 7:41 pm

lem do you stock the fel pro 1099 ?
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Post  Lem Evans March 23rd 2010, 7:42 pm

No

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Post  Oakley Motorsports March 23rd 2010, 9:05 pm

badnotch wrote:what options are there other than cometic ? i know to many people that run them that have had notheing but issues - does MLS make them yet for 4.600 BBF yet ? thanks

Best engine builders in the world use cometic. If you are going to spray your stuff with any compression there is no other option. Just built a 632 c-head engine for Cheyenne Stanley that went 4.45 5 times with .98 60 fts on all engine on his first outing with cometic gaskets an no issues.

I use cometic on my own car and would not run anything else. I like those Wallys to much.

Oh I almost forgot didnt you make a crack at me once about my spelling. Looks like you need some help also.

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Post  jesse March 23rd 2010, 11:58 pm

i am no expert here so take what i say how ya want
i have ran fel po's for yrs without any issues
why? well there are about half the price as cometic's
and never had an issues
so when i built my 530 A-head motor i went with felpro
well i was inspectin my heads the other day and i noticed the
steel ring on the gasket has been groving into my heads
so now i gotta get them milled 5-8 thou
so for me persoanly it will be cometic from now on
i am not saying it wont happen again but keep in mind you can reuse thease
i got a frend that has used the same set for 3 builds with no issues
so he is money ahead
just something to think about
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Post  cubicgator March 24th 2010, 1:38 pm

My cometics from lem held all the way to 24 psi boost on my A-headed 533, 26 finally kicked it to the water passage. This was with 10 bolt heads also.
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Post  badnotch March 24th 2010, 9:16 pm

ya ya ya i know -well im gonna run the 1099 first- ive got to many friends that run the cometic and have issues
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Post  brad March 24th 2010, 9:21 pm

what problems are they haveing with them?

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Post  Lem Evans March 24th 2010, 9:54 pm

brad wrote:what problems are they haveing with them?
He said his friends have issues. I'm not sure he is speaking of the gaskets.

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Post  138 March 24th 2010, 10:07 pm

Lem Evans wrote:
brad wrote:what problems are they haveing with them?
He said his friends have issues. I'm not sure he is speaking of the gaskets.

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Post  badnotch March 25th 2010, 5:14 am

they leak - mike had a set bolted on put water in the motor and started leaking before engine was even fired up- pulled head - installed new set issue gone

most od them have switched to the never style mls - the sticky ones not sure who makes them -i think fel fro
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Post  the Coug March 25th 2010, 5:42 am

yes Felpro makes a MLS head gasket for small block fords and 4.6 not one single one for the BBF 385 series..... Shocked if they leak Why not spray a small amount of spray sticky sealer to the surface and be done with it? I have had mine on and off 4 or 5 times and still seal like new...... something just Ain't right with this situation..... maybe they have to course a head surface or Block decking surface? is the only reason they would leak.....


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Post  richter69 March 25th 2010, 10:09 pm

I have never had an issue here with Cometics on any of our engines...............A+ know-it-all racer skills triumph once again.
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Post  the Coug March 25th 2010, 10:20 pm

me either matter fact I talked to Shawn this afternoon and checking on Cometics for my Cleveland power plant, that I am building for my Pinto.... Cool


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Post  Doug Rahn March 26th 2010, 6:49 am

If they leaked, more than likely they had the incorrect surface finish on the block or head, of even both, and/or did not re-torque after a heat cycle. Cometics have been on my 598 since day one, around 14.75-1 comp., 40 plus runs with zero problems.
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Post  DJOHAGIN March 26th 2010, 11:07 pm

badnotch wrote:what options are there other than cometic ? i know to many people that run them that have had notheing but issues

I'm quoting from Cosmetic's FAQ section of their website:

"What surface finish is required to us an MLS head gasket?

A surface finish of 50 RA (roughness average) or finer, is recommended for a proper gasket seal. Anything rougher may conflict with the gasket design."


To put that in perpective, go to the bank and get a brand new dollar bill. Feel how smooth that is. That kind of smoothness, or smoother, is needed for the Cometics to seal. Not every machine shop can/wants to do that fine of a finish. That is why you hear of some people having no problems with the Cosmetics, and others doing all sorts of different things trying to get the gaskets to seal. It is all in the machining. Wink

Hope that helps,

Dave

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Post  powerstrokeace March 27th 2010, 9:36 pm

Please correct me if I'm wrong. using the Cometic and other MLS gasket require and different type of block and head surface preping. Almost like a mirror finish compared to the more coarse finish that the felpro use.

Ace

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Post  Nevs March 27th 2010, 9:47 pm

DJOHAGIN wrote:
badnotch wrote:what options are there other than cometic ? i know to many people that run them that have had notheing but issues

I'm quoting from Cosmetic's FAQ section of their website:

"What surface finish is required to us an MLS head gasket?

A surface finish of 50 RA (roughness average) or finer, is recommended for a proper gasket seal. Anything rougher may conflict with the gasket design."


To put that in perpective, go to the bank and get a brand new dollar bill. Feel how smooth that is. That kind of smoothness, or smoother, is needed for the Cometics to seal. Not every machine shop can/wants to do that fine of a finish. That is why you hear of some people having no problems with the Cosmetics, and others doing all sorts of different things trying to get the gaskets to seal. It is all in the machining. Wink

Hope that helps,

Dave

Correct...
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