hey everyone i recently found out i have a blown headgaske and i just have a couple questions do i need to replace the supercharger gasket and exhaust manifold gasket? do i need to replace the supercharger oil too? if anyone who has done it was it rather dificult or easy? and how are the arp studs and the cometic gasket if anyone has tried it? thanks

 

Arp headstuds are a great upgrade over stock head bolts. and you don't have to replace the arp headstuds if you ever take the head off again. i've heard bad things about cometic so I went with a new stock head gasket. I would replace the intake manifold and exhaust manifold gasket also. not sure on the supercharger oil tho. taking the head off isn't too difficult on this car just take your time and do it right the first time.

 

Do all gaskets...more than likely NONE have been changed.

Also change S/C oil, most likely that hasnt been changed either

 

both of you are incorrect

intake gasket is reuseable so is the exhaust gasket and the blower gasket you do not need to change the blower oil the cometic is a good gasket but most prefer stock

 

Even if that's true i would replace the exhaust manifold gasket at least. its multi layer steel just like the head gasket and would you take the head off without replacing the head gasket lol?

 

I just prefer to change my gaskets if its been awhile. But yes those are reuseable.

 

dude you need to realize that it is to different purposes there is next to no pressur on the exh side and yes i have reused a mls head gasket many times and it was a cometic that is one of the purposses of a mls gasket

 

you dont need to replace any of the gaskets with o-rings, but as always clean all gasket surfaces thoroughly. the head gasket kit i bought from CED came with the head gasket and new exhaust and intake manifold gaskets already. It's a pretty nice kit. comes with valve seals too. I like to use oem torque to yield head bolts because you run less risk of stripping out the block with a weaker fastener. There is a reason why they made the bolts torque to yeild.

Cylinder Head Gasket Kit Cobalt 2.0 LSJ 2005 - 2007 12595961

 

you are incorrect on the tty bolts they are used because it is easier to program a machine to only turn them x amount of degrees to do final tightening then to torque them to a specific number they arent a weak fastner by any means but there is better out there

 

Lol damn it seems like everyone is incorrect on this thread besides this guy ^^^

 

The drama behind the cometic gaskets, IIRC, happened when people ran them concurrently with arp head studs. they sealed so well that when people started running higher than normal boost, they started popping sleeves. The argument was that on stock tty bolts and gasket (in the same situation), the head would lift and blow a gasket and the bolts. So it's kind of a catch 22. If something blows, which would you rather.

OP, what are your mods? How many miles are on your s/c?

 

there are a few people that get stripped threads using arp bolts. a torque to yield bolt is always more forgiving to error.

try doing a google search:

https://www.google.com/#hl=en&safe=o...dcdcaaff79c334

 

most fastener insertion spindles these days are fitted with torque sensors. if this is in fact a problem for GM, then their equipment is probably old as **** haha.

 

the mods done to my car are 2.8 pulley 60#s dual pass intercooling injen intake, magna flow catback, zzp dp, s3 heat exchanger and i think thats it there is currently just over 91,000 on my s/c and what is everyone trying to sy use arp studs with stock headgasket or what im confused

 

preignition or a lot of detonation is the main reasons why sleeves pop your not going to lift the head on the stock fastners

you can atribute that to incorrect instalation on the studs and we dont have a honda or a dsm


you can use stock tty bolts or arp studs just install them correctly

 

and yes, you should change the s/c oil if you haven't already.

 

so arp studs and a stock headgaket is the way im going now another question whats the correct way for installing them if anyone knows?

 

make sure that you clean out the head bolt holes realy well put some arp lube on the stud screw it in untill it stops then back it out a quarter of a turn if they dont screw in by hand very easy then you will need to get a thread chaser to clean up the threads

 

they should screw in all the way by hand?

 

yes if not the threads in the block need cleaned up with a thread chaser not a tap

 

i took a grinder down the length of one of the old head bolts to make a slot. works just as well as a thread chaser, and it's free.