What's needed for MLS headgasket

[Clinical]

I remember at one point there being a thread about exactly what is needed for a MLS headgasket, I forget if there is certain head/block work that needs done.

I'm running .20 over Ross Pistons.

I'm planning on buying
Cometic Multi-Layer Steel Head Gasket (DSM) - Modern Automotive Performance

I'm going to be running around 30psi and need something that will hold.

 

[97gst_spyder]

Both need to be decked so the mating surfaces are perfectly flat.

 

[livedsm4g63]

I got away with using a razor on my block to get off the old gasket material. I only had the head machined and its holding 27 like a champ. I however did also use 2 coats of copper spray. No leaks after 8k miles.

 

[Clinical]

I may go with the latter then.

I really don't feel like pulling my motor at the moment. Just want to get it back on the road.

The head will be decked, the block I'll measure and do the best I can.

 

[Boomdeeze]

I got both shaved and didn't use any copper spray, holding 25 psi strong. Will be testing the waters of 35 psi in spring, so we will see how she hold up.

 

[dsmrollerz90]

I have the factory head gasket with 125k on it and factory head studs, any idea on how much boost out of my evo 3 16g these will hold? i plan on running 20-25psi.

 

[Clinical]

I have the factory head gasket with 125k on it and factory head studs, any idea on how much boost out of my evo 3 16g these will hold? i plan on running 20-25psi.

I personally would want ARP Headstuds.. however there are people that have pushed them to 20+psi.

Otherwise, headgasket should be fine.
My car has been running 25psi on an FPGreen for 3 years and is only finally giving out on the stock oem headgasket.

 

[91mitsuman]

It is recommended notice my wording. That you have the block and head machined to mirror surfaces. You need to let your machinist know you will be running a mls gasket. I installed my cometic 3000 miles ago after blowing my mitsu mls. So I can't give testimony to my longivety. The mitsu gasket had sep studs and mirror finish and still went.

 

[2GbTalonGuy]

I will recommend machining the block as well as the head also. Depending on how much they need to take off, you may need some shims too.

 

[BogusSVO]

the head surface is critical, as is the block. if this engine has been thu several HG, the block surface will need a close look.

if it is a factory virgin finish you should be ok, but if the block has been cleand with a rol-lock disc, then the block stands a very good chance of needing milled.

http://www.dsmtuners.com/forums/new...face-4g63t-cylinder-head-mls-head-gasket.html