Stainless exhaust manifold , NM Torque

[gas mart 1]

Hi, Can anyone advise me on the NM torque for stainless exhaust manifolds on the V8. Is it the same as cast manifolds ?
thanks
martin.

[TVRleigh_BBWR]

Would expect it to be the same, as normally torque settings are based on bolt size and material its beening screwed into.

[Number 7]

From memory, it's 15lbs ft - I'll let you do the conversion. Trouble is, you wont be able to to get a torque wrench on a few of the bolts anyway. Even with the reduced head ARP bolts I'm using, and with a 3/8 drive wrench, it wasnt possible to get them all. I'd suggest just using a decent ring spanner, and doing it by feel (not tighten it up till it breaks and back off half a turn ). As Leigh said, it's the ally head that's the deciding factor, not the manifold material.

[gas mart 1]

Many thanks for the advice, I have the allen bolts are they any easier to get to ? or should I swap them for hex.

[Campbell]

I dont think you will have any problems with allen bolts.
I made my own version of the arp studs for my ss manifolds

[adam quantrill]

A good way is to torque up to just less on some easy ones say 13lbf, then use the spanner to tweak it a little, to get the feel for it. Then re-use the torque wrench at 15lbf and if it clicks and only moves a little you are spot on.

[Campbell]

I dont think you will have any problems with allen bolts.
I made my own version of the arp studs for my ss manifolds

[gas mart 1]

Thanks Guys, Just to confirm, The engine will go back in ok with them installed..

[Campbell]

Gas mark1 ive had the engine out of my SEAC twice and each time its gone back in i didnt install with the manifolds on as it would not fit.