Please HELP!!! Micra K11 Engine Screw

[CMF_p8]

Hi, I want to rebuild the engine of my 1995 Micra K11. Please see the photo below (red circles). I would like to know what is the figure of the measurement gauge (kgs or kps) of these engine screws (total 10 screws)? Thank you.

 

[CMF_frank2]

haynes says to tighten the headbolts in 4 stages, 39nm, then 78nm, then slacken and 35nm, then 60 deg.
i personally do about 80 nm (at a guess), then hours later i fully slacken each bolt one at a time, and then about 80nm again

 

[CMF_Glenj]

Can i ask (maybe a dumb ? ) why do you have to have to slacken head bolts torque?

Thanks

 

[CMF_frank2]

Glenj WROTE:

"Can i ask (maybe a dumb ? ) why do you have to have to slacken head bolts torque?

Thanks

because they will turn another 30 deg @ the same torque value glen