Exhaust manifold torque settings, advise needed.
Moderator: martauto
Hi Guys, im looking to replace my exhaust manifold gasket over the weekend just wondering if anyone would know the torque settings , its just ive a bad time in the past with studs snapping on a vauxhall i had so im a little worried this time round , would be gratefull for all advise , thanks
I had mine done by Bartley BMW in SOuthampton a few months back - give them a call - I found them very helpful.
www.bartleyuk.com
www.bartleyuk.com
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daimlerman
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My book says 16FT/PD.But while you have the manifold off,check that the face is flat...the 6 cylinder one has a nasty habit of going banana shape,pulling studs out...
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Simon13
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not really most old ehaust studs have a nice habit of snappingmaxfield wrote:Bit of a difference between a vauxhall and BMW
My advice is soak all the nuts/studs in wd40 for a few days, weeks, years if you want before you do it. Remove it with the engine at running temp too, but mind your fingers!
Manifold studs are still shite though 
Best bet is to give all the studs a good helping of freeing oil a day or so in advance. Plus Gas is much better than WD40, so if you need some freeing oil give it a go. Some people prefer to go at the nuts when the engine is warm - probably helps a little. The nuts are 12mm and prone to rounding or worse, the stud shears. Best technique is to sharply untighten the nuts with one brisk movement (use a 6 sided socket) of the ratchet/breaker bar, it's likely to take the stud out along with the nut, I found that if you gradually increase the anticlockwise force on the ratchet/breaker bar you are more likely to shear the stud.
Apologies if the above is poorly explained
Best bet is to give all the studs a good helping of freeing oil a day or so in advance. Plus Gas is much better than WD40, so if you need some freeing oil give it a go. Some people prefer to go at the nuts when the engine is warm - probably helps a little. The nuts are 12mm and prone to rounding or worse, the stud shears. Best technique is to sharply untighten the nuts with one brisk movement (use a 6 sided socket) of the ratchet/breaker bar, it's likely to take the stud out along with the nut, I found that if you gradually increase the anticlockwise force on the ratchet/breaker bar you are more likely to shear the stud.
Apologies if the above is poorly explained
Hi, well i had a crack at it today all seems to have gone ok ie no studs snapping , unable to locate my torque wrench so i just did them up tight then just a little more for good luck , will re check them in a week, thanks for all info guys. 