3sgte metal head gasket?

[2revup]

Ok I am now up to number 5 for head gaskets.. this is starting to annoy me slightly.

What else are others using for their metal head gaskets, I have used std, Copper, HKS and TRD.
Maybe I Just have bad luck but what have others been using without failure?

[sw20r]

Im using Cometic Multi layer head gasket

[2revup]

yeah that was the next on the list but wanted to see other experiaces with other HG's

Where did you source yors from and how much and what are the thicknesses they come in?

[abently]

Something is wrong and its not the HG.

Remember Head gaskets are meant to let go instead of holding it in for major detonation to kill the pistons/rods and block.

Sounds like the Head has gone 'soft' and as such will never seal correctly again.

[The Real Roadrunner]

sounds more like its getting detonated like all fuck rather than the head has gone soft.

if the tuning is right you wont have a problem with head gaskets (unless you have cooked the motor previously)

what sort of timing numbers is it running?

cheers
linden

[LeeRoy]

Are the head and block mating surfaces flat?

[o_man_ra23]

Solid head gaskets (ie copper) won't seal properly unless you o-ring the block and head. Pretty sure multi-layer doesn't have that problem.

As mentioned though, check that is actually your problem before buying more head gaskets. What head studs are you using?? Are you changing them every time (remember they are torque to yield, and are one use only!!)

[allencr]

What head studs are you using?? Are you changing them every time (remember they are torque to yield, and are one use only!!)

Until you can find an actual manual for me, factory or otherwise, about torque-to-yield for ANY TOYOTA engine & not about the torque-angle tightening method, PLEASE don't scare the guy with a guess.

Thanks oldcorollas!

Yes, after 5 HGs, the problem is most likely due to you not knowing/checking something, rather then the brand & type of gasket or bolts, unless this thing is putting out huge power.

Is it being re-torqued?

[oldcorollas]

edit.. ... apparently from an old toyota training manual...
http://img178.imageshack.us/img178/3359/plasticrwh1.jpg

[2revup]

maybe I should calify a bit more
this is over a period of 6 years.

I have had the head service many times a new block and sevral rebuilds!!!
SAS was the last to rebuild which was slightly over a year ago and its done maybe 20,000K since. If SAS sore any issues with the head (whcih was serviced also) then it would have been changed (with the spare i have), I know the block was changed.

I dont think its a question of the head going soft and not appliing corretly. Just simple bad luck, as the car does push out a substancual amount of power and it does run a big turbo which does obvioulsy but extream amounts of pressure on the engine.

Does anyone know where I might be able to get a cometic HG from locally?

Cheers guys, appreciate all your replies and help.

[2revup]

Owh head studs and teh whole motor uses ARP!
and they were all new at reubild!

Also O man yes the block was O ringed (had to get another one when i went changed to metal)

[abently]

How much power ? What Compression ratio ? What cams ? Still sounds like a tuning issue...... either timing or too much boost for the Fuel Octane.

HKS Headgaskets are re known to be off better quality then Cometic's so I cant see the problem going away once you use a Cometic HG.

[Joshstix]

I'm using a stock Toyota Gen3 metal gasket in mine. Running 21psi of boost on 9:1 compression BP Ultimate fuel, tuned by Dave and haven't had any issues for 3-4 years.

[abently]

I'm using a stock Toyota Gen3 metal gasket in mine. Running 21psi of boost on 9:1 compression BP Ultimate fuel, tuned by Dave and haven't had any issues for 3-4 years.

Sorry Josh, should have been more clear, which is why I asked 2revup, what power or What Turbo and boost ?

There is only so much extra Fuel and backing off timing you can do to tune out knock on 98
Ron Fuel when using a big Turbo with a high CR and small cams Engine, that you get to the stage you just have to limit boost.

[Joshstix]

Probably should have mentioned then, it's running a GT3582R and making 288rwkw.

Really what I'm saying is unless you're detonating then there is an issue.