reality check time

[scottinAZ]

I need to replace the head gasket in my 270K B27. I have all the parts, the new bolts and the bentley. I just am looking for a reality check on the torque for the head itself. Bentley states that it starts at 22lt/lbs, and second stage is +90 degrees (i can deal with this) I am just checking that 3rd stage is also correct at another +90 degrees. It is also NOT stated whether this final torque is done at room temp, or at operating temp.

This isnt a job that one wants to do over again, so I am looking for a reality check on it to make sure that my understanding is indeed correct at the torque values stated, and that I should do the final torque at room temp (much easier than doing it hot, as I dont have to contend with needing another valve cover gasket)

[hotballs]

For the Torx head stretch bolts you follow the order 1-14 in the bentley at 22ftlbs. Then do it again 90 degrees. Then do it again another 90 degrees. It's just the nature of the bolts. If you used some MM blues or whatever some turbo guys run then it is a one time torque value IIRC.

Don't over think it.

[scottinAZ]

For the Torx head stretch bolts you follow the order 1-14 in the bentley at 22ftlbs. Then do it again 90 degrees. Then do it again another 90 degrees. It's just the nature of the bolts. If you used some MM blues or whatever some turbo guys run then it is a one time torque value IIRC.

Don't over think it.

Im using the torx head thingies. Normally TTY bolts are a torque, and then an angle, not torque, angle, and angle. Just wanted to make sure that Bentley didnt have a typo in there somewhere that would lead to me snapping off a head bolt (royal unneeded pain in the ass...)

[txtorquemade]

As I understand, it is correct 22ft/lbs + 90 degrees + 90 degrees.

[jlevie]

22ft-lb, then 90deg, and another 90deg is correct. All of this is to be done before firing the engine.

[Trucidatio]

They would be correct, just did this recently when rebuilding my m20b25..

and did the angles in the most ghetto way possible.

3k miles later still running strong.