Ehxaust Stud Torque?

[Jim Moore]

HI Guys,

 

I pulled a couple exhaust studs when I was trying to get the nuts off. I have a pretty good plan to get them back into place, but I need to know the torque for the studs themselves. I didn't see anything in the manual, but I'm not sure I was looking in the right place. Another question. Should I use locktite on the studs? I have blue stuff and super-duper green stuff.

 

Edit to add: It's a 94 R1100RS with a 96 RT engine.

[cele0001]

Just bolt it up and RUN IT already !!!!

[dirtrider]

Afternoon Jim

 

I haven't ever seen a torque value for those studs. Most 8x1.25 studs into aluminum are speced to somewhere between 13-15 foot lbs.

 

Personally I just turn them until tight & call it good.

 

You can use Loc-Tite if you want but that area runs so hot that the Loc-Tite will not do any good long term.

 

If you do use Loc-Tite just be sure you use very little & none on the end or the stud as you don't want to hydraulic the hole & damage the cyl head.

 

Just double nut the stud to install. Once in remove both nuts.

 

[Jim Moore]

Thanks, DR.

 

Cele, I'm gettin' there. Maybe this week.

[Denny Pink]

Hi Jim;

 

Apply copper based anti seize to studs.

Exhaust header nuts torque to 15 ft lbs.

 

Easy peazy

 

[AndyS]

Hi Denny,

That torque figure for a stud of that size looks about right. However, where did you get the info from? I can't find it in any of my maintenance documentation.

[dirtrider]

Morning Andy

 

Denny is giving the torque for the stud NUTS (flange nuts) not the studs into heads.

 

1100 is 22nm (16.2' lbs) _(it's in the BMW service manual)

 

1150 is 21nm (15.5' lbs) _(it's also in the BMW service manual)

[AndyS]

Thanks for the clarification DR.