8v head bolt torque settings?

[boffer8]

hi, doing the head gasket on me 1.2 8v and was wondering what the head bolts need torquing down to? as my haynes says do it in degrees and i only have a sealey torque wrench and dont really fancy messing around with a bit of paper and rough meausrements of angloes on that.
cheers

[Rich]

Its usually bolt down 25nm, then turn 60, 60, 60 degrees in sequence.

I dont know the exact settings for the 1200, but that was what i did on a 1400spi astra today

[AlexW]

As rich said. I doubt anyone will know the torque settings. Its easy enough to do.

[Spudly]

Its usually bolt down 25nm, then turn 60, 60, 60 degrees in sequence.

I dont know the exact settings for the 1200, but that was what i did on a 1400spi astra today


My mate did his let at weekend and the instructions that came with the headbolts were 25nm then half turn, half turn, half turn in sequence

[Ash]

ALSO! Dont forget to re-torque after it's warmed up, roughly 15mins or you'll have low compression and problems like me :wall:

[mayhem]

most 8v are 25nm and 3x 60 degrees

most 16v are 25nm and 3x 90 degrees

re-torgue is 45 degrees on a 16v.. dont know about 8v.

[Adam]

ALSO! Dont forget to re-torque after it's warmed up, roughly 15mins or you'll have low compression and problems like me :wall:
Ive never re-torqued ANY headbolts once the engines warmed up

[mowgli]

you can get a really cheap angle gauge to fit on your torque wrench, & even halfords sell them

[just vaux trev]

Ive never re-torqued ANY headbolts once the engines warmed up

2nd and never had any probs

[mikey14sr]

Ive never re-torqued ANY headbolts once the engines warmed up

3rd'd. And I've always done it as 2x90degree pulls, as it was easier to do without buying an angular torque gauge!
Although I have done checks to find out at what torque setting they will start to turn again, which seems to average out at 175lbft, once the engine has cooled right down again (next morning).

[Ash]

Well I used GM stuff and followed the haynes method, but didn't read the bit about re-torqing, when we did a compression test (when I melted the piston) all the other pistons were low. Block and head had been skimmed too and HG was fine.