Can I use a cometic mls gasket with o ringed head

[shadohc]

I have stainless steel o-rings in the head and they are around each cylinder and I am having my motor re built and i allready bought a cometic gasket can i use that with this application or do i need a composite

 

[Imback]

Composite or copper.

 

[shadohc]

I bought the car and I am doing a rebuild and bought the gasket before i tore it down should i get a oem composite or will a fel pro from advance be good i also have arp head studs

 

[Imback]

Either or. I use the fellpro since there 31$ locally.

 

[1fastlaser]

You can use a cometic with a O ringed head or block. Its been done, and there has been a couple shop cars that have ran that setup for reasons of needing a special thickness gasket since the oem mls comes in one thickness.

 

[TurboDSM90]

Who did the oring in your head? The main importance is, whats the oring protrusion?

Generally the rule of thumb is Steel oring to a composite HG and copper to MLS. You can always change out the orings for copper and run the cometic. Copper orings on a cometic or even a mitsu MLS are my favorite methods of sealing the head to the block. They seal too well, and will not forgive an error in the tune or a mishap with boost.

Composites and a steel oring seal well, but one small hiccup and it will let go at 40+psi. The mls and an oring will not.

 

[1fastlaser]

.009 protrusion. M2 had been doing cylinder heads for Alex at Dogbox racing for years, and every motor he does is SS oring and USUALLY a oem MLS. On his evo he had problems on a non o ringed head. He had to use cometics because of the thickness he needed specially made. He has had a SS o ringed head with a cometic mls for the past 2 seasons.

There is more then a few guys that dont post there problems on here that have had sealing issues with a felpro permatorque (I just became one ) and had to go mls with a o ringed head.

I have 4 buddies that run the same setup oem mls and a SS o ring. Oh yeah the composite will most likely let go...a mls will push, warp the head and still have to be replaced 90% of the time. or it will just melt/destroy everything inside. Just got to keep the tune SAFE .

I have a oem mls that came off a buddies car that had a ss o ringed head, never leaked a drop, and bit into the gasket very nicely. O ringed a problem block head if it does not seal without the o ring with a MLS gasket will NOT fix the issue. Both surfaces still have to be perfect for the mls and a o ring. Just be ready for everything to melt if something goes wrong.

 

[TurboDSM90]

.009 protrusion. M2 had been doing cylinder heads for Alex at Dogbox racing for years, and every motor he does is SS oring and USUALLY a oem MLS. On his evo he had problems on a non o ringed head. He had to use cometics because of the thickness he needed specially made. He has had a SS o ringed head with a cometic mls for the past 2 seasons.

There is more then a few guys that dont post there problems on here that have had sealing issues with a felpro permatorque (I just became one ) and had to go mls with a o ringed head.

I have 4 buddies that run the same setup oem mls and a SS o ring. Oh yeah the composite will most likely let go...a mls will push, warp the head and still have to be replaced 90% of the time. or it will just melt/destroy everything inside. Just got to keep the tune SAFE .

I have a oem mls that came off a buddies car that had a ss o ringed head, never leaked a drop, and bit into the gasket very nicely. O ringed a problem block head if it does not seal without the o ring with a MLS gasket will NOT fix the issue. Both surfaces still have to be perfect for the mls and a o ring. Just be ready for everything to melt if something goes wrong.

Ma bad, I was aiming my post towards the original poster. Unless you know the info on his head, then you are spot on.

In my use, I have a buschur oring'd head. It was originally done with copper orings for an mls. I switched them out for steel rings and used felpro composites for the past 2 years. Now I am back to a cometic headgasket cause I was tired of pulling the head off due to very minor mishaps. Even with a safe tune, ironing out small bugs can get trivial. Experience builds wisdom

 

[BogusSVO]

The way I was taught, and still think is, The head gasket is the fuse, when it lets go, how big a boom do you want?

A what level do you think changing a HG just becomes basic maintance?

 

[shadohc]

I did my research on here and from what I got it is better to use a oem composite with stainless orings my head is a buschur oringed with oem composite

 

[TurboDSM90]

The way I was taught, and still think is, The head gasket is the fuse, when it lets go, how big a boom do you want?

A what level do you think changing a HG just becomes basic maintance?

In my case, every year when the bearings, rings, gaskets and seals get inspected and/or changed. Depending on compression, blow by, oil consumption, wear, etc.,

Another reason I liked the cometics and oem MLSs with the oring'd head was because they were reusable.

 

[1fastlaser]

I know it was, I was just adding more info in my searches, talking to people I know etc for further reference since forums are full of misinformation.

Ever do a o ring head mls gasket search on google...man different forums throw around rumors and hear so so much it makes me wanna throw up.

I am about to put a fresh head back on my new motor because a felpro mls gave on me. I know I am going to play indecisive with the oem composite, and the cometic mls I got sitting here .

And Ted thats a perfect reason...cleaning the gasket! Its so give and take.