Reply With QuoteIt doesn't matter what brand of head-gasket it is, it matters what bolts you're using
If it's those allen-key type reinforced bolts from japland, then they just use standard 4AGE torque settings.
Torque setting w/ TODA MHG
Currently having the head fitted with a TODA 1.0mm head gasket with reinforced head bolts from Japan, wondering if anyone knows what the correct torque setting would be for the metal head gasket?
It doesn't matter what brand of head-gasket it is, it matters what bolts you're using
If it's those allen-key type reinforced bolts from japland, then they just use standard 4AGE torque settings.
though it depends if they are those torque to yield as well, or not.
"apparently" the standard 4age bolts are one use only, though i reused mine and its still going 2yrs later....
i would be trying to find specific instructions for the bolts, as the standard toyota 4age settings are for standard toyota bolts, which mr ae092 doesnt have.
In faith there is enough light for those who want to believe and enough shadows to blind those who don't.
- Blaise Pascal
You've done stress/strain and young's modulus right? You do realise what happens to the metal when you tighten a torque-to-yield head bolt?
yer i kinow whats going on, and i only found this out after i put them back in. and at the time i needed the car back together ASAP so it was a bit rushed.
4age manual gives a length that the bolt should be (exhaust side is 108mm and intake is 90mm), sais "if any of the bolts dont meet them, replace"
soooo maybe i got lucky and mine are all in spec, or they are in spec good enough to seal for the last 2yrs or so.
In faith there is enough light for those who want to believe and enough shadows to blind those who don't.
- Blaise Pascal
Exactly the ones' I've got and called a few 4AG shops and they told me to use the stock torque settings as well. 29nm + 2 x 90 degree passes.
I had a set stretch on me tonight. 4AGE factory headbolts are torque to yield and should be replaced every time. Factory torque settings is 3-stage: 29nm then 90 degrees, then an additional 90 degrees.
Last edited by Javal; 1st September 2010 at 10:38 AM.
You can have any brew you want... as long as it's a Datsun / Corolla / What is that?
Sure? I've read elsewhere is 29nm then 2 passes of 90 degrees
Yah, two passes.
Just to entertain people's curiosity, this is what happens to a rod bolt (torque-to-yield) that's been done up once or twice too many. The stretch is awesome!
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