MLS Head Gasket

[mitsubishi98gs]

i was told i should use it because i did not resurface the block. I did get the head resurfaced though so im not worried about that they took 4000ths off of it. I cleaned up the block with a 3m pad.

 

[myturbo]

nope, just make sure the surfaces are clean and flat, and you will be good, and you only use that stuff on non MLS gaskets.

 

[fwdmaster]

i was told i should use it because i did not resurface the block. I did get the head resurfaced though so im not worried about that they took 4000ths off of it. I cleaned up the block with a 3m pad.

You were told wrong,when using a MLS head gasket, the block also has to be resurfaced for a tight seal,when using a composite head gasket,there is no need to get the block resurfaced just the head

 

[mitsubishi98gs]

I checked the block for straight ness with a straight edge and it looked pretty flat, But i was thinking about spraying the block and letting it sit before installing so i could make shure that it fills in any little inperfections.

 

[myturbo]

well .ive a few times not resurfaced the block ,and it was fine .....but if it is straight do not spray anything on it,

 

[VelocitàPaola]

Hey everyone, I just picked up a felpro MLS head gasket. Does any one know if i should spray it with copper spray or just put it in as it comes?

As you'll see, this topic is a point of contention among enthusiasts. Personally, I recommend using the new MLS gasket without any copper gasket spray. You can verify that the block is flat with a straight edge. If it's not, get it decked.

 

[mitsubishi98gs]

Alright thanks guys so no copper spray on the MLS.

 

[Calan]

I was leaning toward the mitsu 4-layer MLS, but it apparently won't work for me.

I'm running .040"-over Wiesco stroker pistons, ARP head studs. Anyone know of some good HG options for me?

 

[bullettdsm]

As you'll see, this topic is a point of contention among enthusiasts. Personally, I recommend using the new MLS gasket without any copper gasket spray. You can verify that the block is flat with a straight edge. If it's not, get it decked.

FWIW OP, I concur on ALL points.

MB

 

[myturbo]

cometic mls head gasket . i think any will be fine. but i know they do make them in different thickness and maybe diffrent bore .

just ask a vender

 

[92tsiawdguy]

I have a .40 over (87.5mm) bore 2.4 stroker. I use a power enterprize head gasket. They make one of the nicest gaskets out there. If your stroker is a 2.0 to a 2.3 with .40 over your bore will be 86.5 i believe. Cometic makes a head gasket all the way up to a 87mm gasket. Make sure the gasket doesn't over lap the cylinder walls. bigger is ok but smaller is a bad idea fyi. Good luck man!

 

[Calan]

Thanks guys.

Out of curiosity...why would your .040 over bore be different than mine?

*****

I really only wanted to go .030, but I couldn't find any stroker pistons at that size.

EDIT:

Of course NOW I find some from Ross that are .030" over...which according to Extreme PSI is 85.75mm. These are a slightly higher comp ratio (9.0 vs. 8.8), but I think I can live with that.

I don't think the machine shop has started my block yet, so I may try to get the .040 Wiesco's that I took to them back, and trade them in for the Ross .030's. And then go for a 86mm HG.

Whatcha think?

 

[HIGHPSI4]

I am running a cometic 87 mm bore gasket on my 0.040" overbored 4G64. I love it. Althought it is 0.5 mm smaller there are no problems. BTW, the 0.030" over pistons that are 85.75mm are 2.0L pistons.

 

[Calan]

BTW, the 0.030" over pistons that are 85.75mm are 2.0L pistons.

That's what I'm building...2.3l 4g63 stroker

 

[dsm-onster]

Is this a 7bolt block? or a 6bolt block?

 

[Calan]

6-bolt.

Just talked to the machine shop, and they haven't started the block yet. So should I grab the 040" Wiescos they have and send them back to Extreme in exchange for the Ross 030"?

And I still need a HG either way I go

 

[dsm-onster]

Man, witha 6bolt, you have very large diamter head studs anyway. I would run a composite for anything less than 650whp. Properly torque the 6bolt head bolts and go knowing that if you lift the head, you won't need to spend the money resurfacing the head. I understand if you want to do it once and be done with it. If that's the case then get some 6bolt l19s ( more than anyone ever needs) and an MLS. The block will explode before the head lifts.

 

[Calan]

Looks like I'm stuck with the 040" over Weiscos (Extreme PSI won't exchange them - it's well past 30 days).

The machine shop is already gonna surface the deck/head to well within specks for an MLS, and I've already got the ARP head studs.

So... MLS or composite, and where do I find one for .040" over? (I found a 86mm cometic that should work... I believe .040 over is 85.75mm)

 

[91gvr4gsr]

ok i had my block bored .30 over to fit my ross pistons ,they are 85.75 aka .30 but i cant find a headgasket that is the right size.the closest i can find is a 86mm hg do i get that or keep looking??

 

[snowborder714]

I think I mentioned what size I recommended when you asked the same question in this thread.
http://www.dsmtuners.com/forums/newbie-forum/333771-what-size-cometic-head-gasket.html

 

[91gvr4gsr]

I think I mentioned what size I recommended when you asked the same question in this thread.
http://www.dsmtuners.com/forums/newbie-forum/333771-what-size-cometic-head-gasket.html

i knew somebody told me already i just could not remeber who....sorry and thanks

 

[EDM95]

Put the car back together and the timeing is off how do I fix that?
It was late out but I will get some better clips later.
Sound clips.
ImageShack - Image Hosting :: 051809210100zx3.flv

ImageShack - Image Hosting :: 051809210800jd5.flv

 

[timot]

anyone care to comment, I would like to know too

 

[chiuchimu]

I don't know if anyone told you this but if you do a headgasket and valve job on a old engine, there is a good chance that you'll get excess blow thru the piston rings.

Its like this, the car parts have worn evenly up to now so stuff has stayed in balance though worn. A new valve job and headgasket create more compression and vacuum in the cylinders. the only loose fit is the piston rings. Simply put, you might burn a lot more oil than you started from even though you fixed two things.

Id rebuild the whole engine at that stage.

 

[PRJTstealth]

i have no clue would be nice to know though. however im running a cometic on my motor with arp head studs