Passenger seat bolts & nuts

[SlowJoe]

I am finally putting the Vader passenger seat back into my 99 M3 after having replaced the green and pink gears - green one broke.

Does anybody know the specified torque values for the 2 front nuts and 2 rear bolts that fasten the seat to the floor of the car?

Thanks a ton.

Thanks to those who originally helped me with this. It really was easy to do.
https://www.bimmerforums.com/forum/s...r-seat-Recline

[Hova]

I couldn't find a torque spec for it in any of the manuals I have. All bolts stretch based on grade, thread pitch, friction, and clamping force, so a good rule of thumb is to follow what the grade bolt is supposed to be torqued to.

The bolt you're referring to is an M10x1.5 and should have loctite on the end of it. Part number: 52108211438

An M10x1.5 bolt should be MAX torqued to 40ft/lbs if it's a grade 8.8, and 60ft/lbs if it's a 10.9

I'm almost positive it's a grade 10.9 bolt in that location, so the torque should be around 66nm of torque, which is 48ft/lbs with loctite added.

https://www.bimmerfest.com/forums/at...7&d=1283995216

You can cross reference other M10 10.9 bolts used in the chassis, I'm sure it will be damn close.

[SlowJoe]

Thank you for this information. Very useful. I recall there were marking on the two bolts and two nuts. I will double check them and hopefully be able to torque to a proper value. Until I do, no passengers...

I couldn't find a torque spec for it in any of the manuals I have. All bolts stretch based on grade, thread pitch, friction, and clamping force, so a good rule of thumb is to follow what the grade bolt is supposed to be torqued to.

The bolt you're referring to is an M10x1.5 and should have loctite on the end of it. Part number: 52108211438

An M10x1.5 bolt should be MAX torqued to 40ft/lbs if it's a grade 8.8, and 60ft/lbs if it's a 10.9

I'm almost positive it's a grade 10.9 bolt in that location, so the torque should be around 66nm of torque, which is 48ft/lbs with loctite added.

https://www.bimmerfest.com/forums/at...7&d=1283995216

You can cross reference other M10 10.9 bolts used in the chassis, I'm sure it will be damn close.