URGENT HELP - Head Bolt Torque Settings

[NorthernRob]

Hui,

Im in the middle of reassembling my worked head.

1984 1.8i head fitting onto a 19834 1.8 M10.

AutoData gives different torque instructions for the heads,

E21 data wants me to do a 6 stage tighten including running the engine for 25 mins before final tighten
E30 data is far sinmpler.

Do i follow the E30 head inststructions as its an E30 head, or the E21 instructions as its obviopusly an E21 Block.

Thanks
Spanners are in hand as we speak.
Cheers Rob.

[e21-Mark]

I'd go with whatever method is the most gradual. I have heard about the 25 minute warm-up method before and I guess it makes sense really. However, I'm no mechanic so you're better off waiting for Jason, Murran etc.

[tyson 320i/323i]

the reason for the warm up is to stretch the bolts before the final torquing. its a necessary thing to do because the head is aluminum and the block is cast. the last time i replaced a head gasket i drove for 500 miles and retorqued the bolts one final time.

[NorthernRob]

thanks guys i now have a new, bigger, problem. Pleasesee latest tech post,