who is running a cometic head gasket successfully

[mirpur]

Time to get myself a headgasket for the let had my heart set on the cometic gasket but after reading a few reviews it seems they are not so good in terms of sealing,also they need implying
Anyone had any problems and what other option of headgasket are there

[STE CORSA XE]

cometic are very good head gaskets u just need to make sure your head face is flat an your block face is flat to

[mirpur]

I've seen quite a few reviews where both surfaces have been cleaned up very well and still leaked

[STE CORSA XE]

Theres a big difference between a surface that has been cleaned up vey well an 1 that is perfectly flat you could clean it so its spottless but if the block or head face arnt flat then it wont mateer what headgasket or bolt/studs you put on it

[mirpur]

I was referring to heads and blocks which have been decked and skimmed not just a polish

[Frisco]

Running one with head studs and no problems at all

[corsadonk]

The block will need to be decked, along with head being skimmed.

I'd just use a genuine one, with ARP stud and nut and a skimmed head.

[STE CORSA XE]

If they are fine an the head is tightened down properly you wont have any problem i have run a 2mm cometic for 4 years now on a good power c20let with plenty of boost an has been spot on

[Adam]

Running one with head studs and no problems at all

ran one for two years fine....now running another with arp head studs...again fine

[mirpur]

My block was decked approx 600 miles ago head was skimmed it may need doing again if not I will leave it
I'm running or planning on running 450 -500 bhp and I doubt the standard gasket will be upto it

[mirpur]

Maybe its how they are being tightened down,are the gasket dimpled,
How you guys tourqeing them down,what sequence and how much torque have you guys all had the heads skimmed and blocks decked

[corsadonk]

Mine went between the cylinders on my XE, it ran fine I didn't know, till I removed the head when it dropped a valve.

[Adam]

My block was decked approx 600 miles ago head was skimmed it may need doing again if not I will leave it
I'm running or planning on running 450 -500 bhp and I doubt the standard gasket will be upto it

standard el ring gasket wont be up to it to 300 let alone 450-500 mate lol

[lee303]

i used to run a cometic, but use a ferriday item now, bi metal, but has a silicone coating too, works very well
Ferriday Engineering
mike certainly knows a thing or two about big boost applications too...but head and block surface finish are everything!

[mirpur]

Lol Yes I know,its just most reviews I read on the cometic they seem to all be failing

[Frisco]

Maybe its how they are being tightened down,are the gasket dimpled,
How you guys tourqeing them down,what sequence and how much torque have you guys all had the heads skimmed and blocks decked

Torqued as per sbd instructions

SBD_Motorsport_BLT-H1-STUD-KIT_Tightening_Method

[mirpur]

63llb/ft seems a little low
Also been told the gasket needs dimples added to it around the water channels

[steveboyslim]

63llb/ft seems a little low
Also been told the gasket needs dimples added to it around the water channels

Read the instructions again.

Steve

[Rs1]

If the cometic has failed it is either poor prep, inadequate torque or wrong application altogether.
There is another option..... available from steveboyslim

[Frisco]

Follow the instructions mate, Ive had no trouble. SBD know how to build an engine....who knew

[mirpur]

steve final torque is 63llb/ft after going through the torque sequence, ok steve you will have to pm me your other option lol
lee what boost you running

[debeerd]

Why not just use the factory Zlet mls gasket.
I'm running one on my 20let with standard headbolts.