Please post the persons name, date this happened and what kind of vehicle as I never hear of this. They are the best in Florida..

 

Jerry when still using a MLS and the SS o rings is the process any different then with a composite setup, like do the rings themself need to be deeper in the groove so it doesnt crush the MLS. also why does everyone seem to run a mitsu mls with o-rings but its forbiddin to run a cometic mls with o-rings, or atleast no one recomends it? whats the difference between those 2 MLS?

 

I personally don't like cometic but many others swear by them. Copper in theory doesn't seal better than SS but it works for many people.

 

I tried all combinations of gaskets and orings when the yellow car has less than a good tune on it. plus tried more combos on customers cars. the best combination is a composite felpro with the head oringed.

nothing stops head flex between studs during detonation. normal combustion produces 2000psi at 15 degrees ATDC. detonation is 4000psi at TDC.
metal gaskets do not seal better in any way. they simply survive longer after head flex. composite material blows away easy so you will be lucky if you can drive home after head lift. the metal will survive much longer and likely just have small leak after lift. very drivable but gasket still needs to be changed.

I used ss ring on mls gasket with oring in the block. .011 protrusion. I would prolly try .015 if installing in head cause its just gonna push way in.
cometic blew far easier than mls when i tried them

two more reasons i dont like mls gaskets. 1 cost. 2 block and head have to be perfectly flat and very smooth. composite is much more forgiving. perfectlyflat perfectly smooth doesnt last long.

 

It was a few years ago...4G63 engine...They arent the best in florida. Sorry to burst your bubble..They have messed up more then once on numerous peoples engines.

 

Well jerry im going with a oem composite, only reason why I didnt go with the fel pro is because I heard that the oem's have slightly larger ring surface on the gasket itself. And I asked about the cometic because I have one laying here, decided I was going to o-ring it after I ordered it, And if anyone knows someone looking for a mls gasket for cheap let them know I have one

 

Okay guy, When a shop has been around as long as they have I would expect one or two mistakes along the way. It's easy to point blame at a shop when you have no creditable proof or evidence besides it was a long time ago and numerous people. lmao I could say the same about modern performance, but at the end of the day it's all just slander with out no real world proof. Hope that doesn't burst "your" bubble, but truth is what it is.

 

the mitsu composite gasket is good. it just the cutout is smaller. like 86mm. the felpro is 87mm

 

Well shit jerry I have .40 over pistons is the mitsu gunna be to small for the rinngs to sit?

 

i think it will clear bore size. what you dont want is the gasket overhanging into the bore. the theory is the gasket edge in the chamber is not a good idea. possibly induce detonation.