Headgaskets

[TurboAlero]

Hey dudes, well just a little question. What headgaskets can I use?? Becuase I bought a while ago copper gaskter but no good head leakage problem. Now I have stock ones but they are also shot now. So they don't hold the turbo pressure. what else can I do?? I'm fed up with this headgasket problem.

[1988GTU]

MAYBE you need to check deck surfaces for warpage? Also, what RA are you using? What torque specs AND procedures are you using? Where are they blowing out at? Same area?

Pictures of the blown head gaskets would be a plus. Post those up.

[TurboAlero]

Well I didn't check were they blowing but , just got the milky oil again. Hmmm torque specs are if I remember hmmm 90 lb and hmm I Have ARP headstuds. Well before the engine was runnin smooth , after some test driving I heard a POP sound and that was it.
This is like the thirth time already with stock gaskets.
before the car was running I check the heads for warpage and they were good.

[robertisaar]

was it in boost when they went? if so, you may have detonation issues. knock will blow holes through pistons and headgaskets VERY easily with a turbo motor.

[TurboAlero]

yes it was in boosting but I the computer didn't register any knock and the car is in boos t at a 12 A/F wide band

but detonation is something that can happen anytime

[robertisaar]

yes it was in boosting but I the computer didn't register any knock and the car is in boos t at a 12 A/F wide band

but detonation is something that can happen anytime

correct, detonation CAN happen anytime, but its MUCH more destructive should it happen while boosted.

[TurboAlero]

yeps,

is there anyother option for headgasket then stock or copper gasket for our engines?

[robertisaar]

correctly made, copper gaskets SHOULD stand up to a lot of abuse...

[TurboAlero]

Yeps I know that, but these ones that I bought way back from Donky punch performance didn't seal good , I did every thing twice but it didnt hold the coolant

[robertisaar]

Yeps I know that, but these ones that I bought way back from Donky punch performance didn't seal good , I did every thing twice but it didnt hold the coolant

custom made from a local machine shop that knows what they're doing? exactly how much boost are you pushing?

[TurboAlero]

12 PSI out of a GT40 turbo

[SappySE107]

Are you running stock head bolts and if so, are you using a new set each time?

[robertisaar]

not sure which exact GT40 you're talking about but according to squirrelpf, thats correctly sized for a 3400, and i'm assuming you're making around 320HP... i've seen stock headgaskets for TGPs go up to close to 400(possibly more) without failing. stock compression ratio?

EDIT: and of course, Ben comes up with something simple that i completely passed over. torque-to-yield headbolts...

[bszopi]

torque specs are if I remember hmmm 90 lb and hmm I Have ARP headstuds.

RTFT!!

[robertisaar]