Yesterday i fitted a new head gasket to the saff, and obviously new bolts.

i used the following sequence;

stage 1 - 25nm

stage 2 - 50nm

stage 3 90 degree rotation

stage 4 - 110nm

I am now worried that the bolts may not be tight enough as on the final stage it did not take 90 degrees to make the 110nm.

Is 110nm bottom limit for the required torque?

Really worried about this now!

Any help most appreciated.

 

Book I got just says:

Stage 1 = 20-25 Nm
Stage 2 = 45-50 Nm
Stage 3 = Rotate further 170 to 180 degrees

Says nothing about a final torque... this is what i've done in the past...

 

I always do mine to 120lb ft, don't bother with angle stuff, but I don't use std bolts either.
tabetha

 

I had read on previous posts that you do a final check for 110nm, i thought it may be a good idea to torque to that in the 4th stage rather than do the second 90 degree rotation to avoid over stretching the bolts.
But now, i beginning to think that bolts are supposed to be tightened up past the 110nm mark when using the rotation method, and the final check ensures the bolts have not been stretched beyond their yield zone.

Cheers.

 

120lb ft sounds too much for standards bolts, could someone give me a figure for standard bolts rather than the rotation method as i dont feel that method is easily acheived accurately with just a torque wrench.

Cheers.

 

I to have the big blue book and it says

Stage 1 = 20-25 Nm
Stage 2 = 45-50 Nm
Stage 3 = Rotate further 170 to 180 degrees

 

as Above i done mine to that,well i done two sets of 90% as it is far to ackward doing 180% in one hit!although if u go to graham goode site for a 4x4 it does say check torque is 100nm after the degrees settings !what stages have u done?just one set of 90%?

 

what i have done is;

25nm

50nm

one rotation of 90 degrees

Then set torque wrench to 110nm and tightened all until it clicked.

I remember a couple of them already being 110nm when i went round so moved on, now im beginning to think i may have to buy new bolts and do it again! id rather do this if my method is not acceptable.

I beleive the final 90 degrees would torque the bolts further than 110nm!

 

you are deffo suppose to do two 90% then if u want you can check the torque of them as u say 110nm but its not really needed

 

I am not confident of the setting of my head bolts so have decided to replace them. I will use the mentioned method of tightening when i make my next attempt.
I will not be replacing the gasket though, i will replace each bolt in sequence.

I presume when replacing each bolt, i take that bolt through all 4 stages of tightening, then i move to the next one....?

Cheers.

 

have u put coolant in it etc?

 

No i havnt put any fluids in it yet, im kind of halfway through upgrading to stage 3, i am fitting t34, rs500 cooler, greens, in addition to that, am fitting full roose hose kit, new radiator, bailey breather system new gaskets pretty much all round, putting the head back on was kind of the first step to rebuilding, it was removed to renew gasket to group a, as i did not know what gasket was currently fitted. I did not want to remove all the parts again due to me blowing out a standard gasket because it could not handle the power!

Cheers.

 

cool!well in that case take all the bolts out and start again!the h/g will be fine fella!

 

ok sweet thats what i wanted to hear! i will take out all the bolts and start again as soon as the bolts arrive!

cheers for your help.