Exhaust manifold torque - have I got short nuts or long nuts?

[alexfisher]

Hi All, just replaced my dipstick guide pipe and have to now replace my exhaust manifold.

The Haynes manual states exhaust manifold nuts torque is:
Long nuts = 16Nm.
Short nuts = 25Nm.

My (copper?) nuts fit a 13mm socket, have a flat round back 18mm diameter, and stand 8mm high (including the round flat).

My guess is that they are 'short' (25Nm) but it would be great to know for sure.
Thanks - Alex.

[GiveMeABreak]

Assuming this is for your 206 - as you haven't stated that anywhere and Mystic Meg is on a Tea Break :-

I'm not sure about the BOL settings, but these are the official TU 8 valve engine torque settings for your assumed 206.

Reference Designation Tightening procedure (1) Cylinder head bolts (aluminium block) (*) Tightening to 2 ± 0,2 daN.m Angular tighten to 240 ± 5 ° (1) Cylinder head bolts (Cast iron cylinder block) (*) Tightening to 2 ± 0,2 daN.m 1) Angular tighten to 120 ± 5 ° 2) Angular tighten to 120 ± 5 ° (2) nuts - Cylinder head cover Tightening to 0,7 ± 0,1 daN.m (3) bolts - Inlet manifold strengthener bracket Tightening to 0,8 ± 0,2 daN.m (4) bolts - Motorised throttle housing Tightening to 0,7 ± 0,1 daN.m (5) nuts - Inlet manifold Tightening to 0,8 ± 0,2 daN.m (6) Inlet air pressure sensor Tightening to 0,8 ± 0,1 daN.m

Reference Designation Tightening procedure (7) nuts - Exhaust manifold Tightening to 2,3 ± 0,5 daN.m (8) nuts - Exhaust fixing ball-joint Tightening to 1 ± 0,1 daN.m (9) nuts - catalytic converter (*) Pre-tightening to 0,4 ± 0,1 daN.m Tightening to 4 ± 0,4 daN.m (10) Engine coolant temperature sensor on coolant outlet housing (BSE) Tightening to 1,7 ± 0,1 daN.m (11) bolts - Coolant outlet housing (BSE) Tightening to 0,4 ± 0,1 daN.m (12) bleed screw(s) Tightening to 0,5 ± 0,1 daN.m (13) bolts - thermostat Tightening to 0,8 ± 0,2 daN.m

[alexfisher]

Doh, sorry about that - yep, it's my 206
Nut 7 = 23Nm - excellent.
Thanks again Marc - Alex.

[GiveMeABreak]

No worries Alex, at least you have the other related torque settings if needed.

[alexfisher]

Yes Marc, great to have those other values too. I would have under tightened the sprung nuts (8) on the intermediate pipe otherwise.
Manifold/exhaust went back on nicely (but I guess Meg already told you).
Thanks again - Alex.