Sylvan Lake V35

iTrader: (23)

Your link isnt working but I think i know what youre talking about. A member on here did the HR coolant piping mod on a DE...KelEL...theshaddix...I cant recall who

Resmarted

iTrader: (2)

Not quite.
Cometic doesn't make any head gaskets with the stopper built in. The HR is a multi layer metal headgasket with stoppers. That's actually a superior design.
I've spoken to a few engine builders (that specialize in jaguar, vw and american engines) and they agree that the stopper is superior. Why doesn't cometic switch if it's so much better? Well the manufacturing cost is much higher to add the stopper. That same engine builder is a vendor for cometic.
That's the same reason why HKS gaskets are so highly recommended for our high hp builds...

Sharif@Forged

iTrader: (92)

For whatever reasons, the cometic gaskets have had a high failure rate across many different V6 nissan engine types. I only use them if absolutely necessary such as a custom bore size. We stick to stock or OEM.

specialist

iTrader: (1)

Do they make hks hr head gaskets? I am sorry if that is a noob question.

I have lifted my head 3 times and used cometic. I am using hks and darton sleeves and pathfinder mod with l19. Vq35de block. Twin turbo. Some times my coolant temps go passed half sitting in traffic. Should I get the block modfied for hr coolant mod? Or maybe start over with no sleeves

Cass007

iTrader: (34)

Are you sure you haven't dropped a sleeve? The sleeves have a somewhat negative reputation for causing heating issues and lifting heads.

Some have had success, but many others have not.

e30cabrio

iTrader: (30)

Should I be concerned with the ones I got through you guys in February for my NA 88mm stroker 96.5mm build? It's still not assembled.

binder

iTrader: (8)

false

i'll take pics to prove it. Every cometic gasket i've purchased has a stopper ring in it. Not sure what cometics you have but in the last 2 years the ones ive purchased have them.

If cometics sucked then people that have 100mm bore wouldn't use them for their 1000hp builds.

specialist

iTrader: (1)

I will see if my sleeve dropped i am ripping it apart to take a look at it to make sure.

Can you tell by looking the seleeve if it dropped

If i decide to keep sleeves and do the hr mod do i have to loose the path find mod?? and go back to the stock one?

str8dum1

iTrader: (11)

sucking and being the only part available are 2 different things

but cometic hasnt seemed to have the failures like they did in the early days of the VQ

binder

iTrader: (8)

true, but how many of those big builds do we hear of that have head gasket failures?

If they were that bad the people putting down power would find a company to build them custom head gaskets that are worth it. I think if their 100mm gaskets hold the 800-1000hp then they'll be perfectly ok for my 500-600hp.

Mine held for 3 pulls at 14psi with 28* of timing before it finally went when that idiot at GRD attempted to tune my car. That's a pretty strong head gasket to hold that.

str8dum1

iTrader: (11)

i dont think there has been a non-sleeved/ ARP stud build with HG failure in the past couple years.

Joe was the the last one I can think of that lifted a head and that wasnt on L19s.

I really doubt any HG choice is bad anymore.

binder

iTrader: (8)

ya. I think quality of all the headgaskets is up to par in order to meet the demands of the customers.

I forgot to put in my other post that i agree with your statement about cometic being the only option for the large bore guys. I also think because they are the only ones they stepped up their game in order to keep their big build customers happy.

Resmarted

iTrader: (2)

Well I'm glad that I'm not having that machine shop that told me cometic doesn't have stoppers on them ISN'T doing the machine work! lawl.

They swore none of the cometics had stoppers. Maybe only the vq model has the stoppers?
Either way im going to be running hr gaskets... with the l19 studs and arp mains...

binder

iTrader: (8)

I think the first head gaskets they made for the vq didn't but that was a quite a few years ago. They just need to keep up on their info. Same as cosworth's being the same gasket as cometic. They are different now.

Resmarted

iTrader: (2)

Yeah that would make sense.
For what they wanted to bore/hone my block (3 grand, without a bunch of clearance measuring) I think they better be up to date on what they tell me. over priced turds

Sharif@Forged

iTrader: (92)

The Cometic failures I speak of, for what it's worth, occuring in the big overbore engines where Cometic was the only option. 100mm bore sizes mostly. If I must use a cometic gasket due to sizing limitations I will, but if another option exhausts I would take it.

I'd have to do some searching, but can't recall anyone having Cometic gasket issues with stock or close to stock bore sizes and good L19 head studs trqed to 90-95 ft/lbs.

e30cabrio

iTrader: (30)

Thanks Sharif. I have ARP studs and am only .20 over. I will make sure the machine shop doing the assembly torques the heads properly.

blAk mAx

are the HR gaskets holding strong? is the block machining a must when using the HR gasket?

lp_turbo

iTrader: (8)

Since L19 stud is out of stock, ARP standard or HR bolts hold more hp ?
I see HR engine approximately at 520hp @ motor on youtube but it's the same for rev up engine with hr hd gasket & hr bolts?

Resmarted

iTrader: (2)

L19's are the way to go.
If you can't find them locally find a shop to get them for you.
If worse comes to worse I can help you get them for you from ARP directly custom made.

Absolutely do not use anything other than the L19's. They're worth it.

Or pick up some used ones.

Get a Dynosty head gasket. It's almost identical to an HKS gasket (which is basically the best) but it's about $100 cheaper.