5 replies to this topic

[EricF]

I can't find my Haynes manual, so I was just wondering what the torque figures are for the 850 head bolts... And are they TTY bolts? I hope not

[850drag]

I can't find my Haynes manual, so I was just wondering what the torque figures are for the 850 head bolts... And are they TTY bolts?  I hope not 

cylinder head:
the upper section is 12 ft lbs

lower section is

stage 1 15ft lbs
stage 2 37 ft lbs
stage 3 37 ft lbs plus another 130 degress.

[Bay13]

It's a three torque process, from the center out each time, with the bolts having the threads dunked in oil first.

1st is 20nm (14LbFt.)
2nd is 60nm(44LbFt.)
3rd is 130degrees.

[EricF]

Thanks

Are the head bolts re-useable or are they torque to yield bolts?

Hope they're re-useable...

[Bay13]

They can be reused. If you had the Volvo manual, it lists a length the bolts can be before you have to get new ones. I've found over time re-used once is OK, the second time around you are better off getting new head bolts cause they are close to being too long.

[EricF]

Cool

I need my shop manuals