I am changing the headgasket on my sierra cosworth 4x4 for a grp A item and using the standard Ford head bolts.

Can someone confirm these torque figures I have are correct:

stage 1 45 to 50 Nm
stage 2 Turn 180 degrees +\- 10 degrees
stage 3 Check for 110 Nm


Also does a new headgasket needs running in for a certain amount of miles or not? The car is stage 2 (greens, 3 bar map sensor, chip etc).

Hope someone can tell as I dont want to do the job again!

 

The figures I have are as follows,
STAGE 1 30-35NM
STAGE 2 65-70NM
STAGE 3 80-90 DEGREES.
There was some confusion over this as FORD did apparently ammend these settings, in a TSB(?)
I took my setting from the DISC SIERRAS RS COSWORTH WORKSHOP MANUAL.
Ford then later issued a completely different set of figures!!.
tabetha

 

Just checked with someone and the TWO different figures actually amount to the same "TORQUE YEILD", on the bolts, which is roughly 90lb ft as a final setting so these will be fine.
tabetha

 

Car is now running again and thank god no leaks or strange noices!

But do I have to run in the new headgasket some way before I can run full boost??

 

You dont run a head gasket in matey....there is only one thing you ever run in on an engine, and that's the bores....everything else being run in is a myth....

 

Thank you guys for your comments!