Changing 1GGTE Head Gasket

[Forcefed6]

Found this in the members rides section in the thread with JustCallMeFrank's car

Head Gasket - $80.00
Head Bolts - $92.40

Now that is Head Bolts NOT studs.

The tool YellowRolla was talking about can be bought from any tool joint and and generally nut and bolt places. It is used to cut new threads, but can be used to clean them too.

Oil stones are used for sharpening knives and stuff and you can get them at hardwares and stuff.

I see you added me to MSN, so send me an email and I will send it to ya.

Cheers

[JustCallMeOrlando]

Well, we have HG love. I'm in between torqueing it down, my back is sore. I started going down until the bolt seated. Then I went 10ft-lb, then 25ft-lb. I'm going to go in a couple more stages then set it to 47ft-lb. (64Nm).

All surfaces have a light coat of Hylomar and everything looks good so far, everyone cross their fingers for us!

[whatthe?]

Wow, is 47 pound factory spec on these? seems low

[JustCallMeOrlando]

Yep, that's it. 47 ft-lb and they still don't really have problems blowing HG's

[whatthe?]

fair enough then. I wonder what the huge differences in engine design was that these can seal effectively whilst a 7M cant at the factory spec 58 ft/lb? Anyway, hope it all goes back together and gives you another 19 years faithful service

[JustCallMeOrlando]

Hehe, hopefully it hangs together long enough to tide me over until I build ze uber G. At 17psi of course.

As for the major differences, i'd say it's because the 1G was always designed as a 2L and was never anything but a 2L, whereas the M started off as 2L then was bored and stroked into ze 3L

[YelloRolla]

YelloRolla, wat is this tool ur talking about? so it basically cleans out the thread, then just suck up the crap it scrapes off?? where would one find this tool?

It is an M10 x 1.25 bottoming tap, made from tungsten chrome (a high speed steel one will last longer but cost 3 x as much). As pointed out by Forcefed, it can be obtained from any decent hardware shop/fastener supplier. Just be sure to check it so that it can go right to the bottom of the thread (some have a silly point ground on them that holds them 3 or so turns from the bottom).

I usually wind them into the deck with the cordless drill (because I am an impatient mofo).

Please check the thread dimension though! I am making an educated guess that they are M10 x 1.25mm. You can check this by taking the head bolt to the store where you are buying the tap and having them check it for you.

[EldarO]

fair enough then. I wonder what the huge differences in engine design was that these can seal effectively whilst a 7M cant at the factory spec 58 ft/lb? Anyway, hope it all goes back together and gives you another 19 years faithful service

58 ft/lbs is the 7MGE rate, not the GTE rate (68-72 ft/lbs something in between there), whether or not the mechanic that told me this is full of shit or not, is yet to be seen, as he did say that the A/C line he snapped off when he did my HG was caused by my broken engine mounts

also, Nathan, the 1G seems to be as popular as the 7M when it comes to BHG, talking about properly done ones, the factory cock-up was bain of 7M...

anyway, in short 7M = teh win, 1G = teh lose.

'nuff said

Eldar.O.

[JustCallMeOrlando]

also, Nathan, the 1G seems to be as popular as the 7M when it comes to BHG, talking about properly done ones, the factory cock-up was bain of 7M...

I'd be inclined to disagree. Most 1G's I've seen die from big ends. The majority of the HG's that go are from engines that sit around for ages.

[whatthe?]

58 ft/lbs is the 7MGE rate, not the GTE rate (68-72 ft/lbs something in between there),

58ft/lb was what toyota started sending GTEs out of the factory with, hence the BHG phenomenon. 72ft/lb is what it actually should have been. I run 80 ft/lb with ARP studs

[emp?]

ok alittle OT, anyone know where to get a good headgasket for these things?
also after a supplier of forged pistons

[Forcefed6]

emp: I can help you with both of them...

[EldarO]

58ft/lb was what toyota started sending GTEs out of the factory with, hence the BHG phenomenon. 72ft/lb is what it actually should have been. I run 80 ft/lb with ARP studs

mines 72 ft/lbs on stock gasket and stock bolts.

runs like a dreammmmmmmmm except for the turbo being too buggered and having my boost drop off as revs increase

w00t

Eldar.O.

[JustCallMeOrlando]

58ft/lb was what toyota started sending GTEs out of the factory with, hence the BHG phenomenon. 72ft/lb is what it actually should have been. I run 80 ft/lb with ARP studs

That doesn't explain why the GE had just as many problems if the GTE was supposed to have its own torque value.

[JustCallMeOrlando]

Head bolt torque tension is also 47ft-lb, 64Nm.. Do this in at least 3 stages in the sequence that is shown above by d-master.

Say 12Nm, 36Nm, then 64Nm.

All this talk about different torque values for 7MGE and 7MGTE has got me slightly worried. I know the GTE manual is in Japanese, but does it definetly say 47ft-lbs for the 1GGTE too?