Wheel Bearing Torque help.

murmur · 11-13-2023, 06:44 PM

I posted in the 5 forum but did not get much luck in getting a response, i figure this is a more over generic question and may be some one here might be able to help,

"Looks like I will be replacing the front wheel bearing on my 2018 M550. I downloaded the instructions from ISTA but am having a bit difficulty understanding the Torque spec,, attaching the screen shot below,, not sure what the sequence is recommended,, tighten plus angle than unscrew ?? any help would be appreciated.." pretty sure i am not reading it right.

B58 parts · 11-14-2023, 10:21 AM

Yeah this is a good one. What I'm stuck on is the word crosswise. Does that mean you do each set of two bolts evenly, do the inside set then spin it over and do the outside set. Or does that mean you kind of do all four together and keep rotating in and out, crossing around, don't know. You're going to have to find someone that is really familiar with this procedure.

Gun to my head if I had to do it I would do the inside bolts, and then rotate it and do the outside bolts all those same steps. Tighten them both evenly to 20 then 140, break them loose about 30° and then tighten them evenly again to 120 and then another 90°. Aren't torque to yield bolts fun.

I don't know what they mean by crosswise for this one though.

g340ix · 11-14-2023, 10:27 AM

appears to be the wonrg section since this is for b58's; but i read it as:

replace a pair at a time, although I personally would do a cross pattern like when putting a wheel on.

Tighten bolts to 20nm, basically hand-tight
Then torque to 140nm
Then back out each bolt by no more than 45 degrees of rotation
Then tighten each bolt to 120 nm
finally, tighten bolts with 90 degrees of rotation

11-13-2023, 06:44 PM	#1
murmur Second Lieutenant 59 Rep 284 Posts Drives: 2017 SO M3, 17 X5M, 18 M550 Join Date: Feb 2011 Location: IN iTrader: (0)	Wheel Bearing Torque help. I posted in the 5 forum but did not get much luck in getting a response, i figure this is a more over generic question and may be some one here might be able to help, "Looks like I will be replacing the front wheel bearing on my 2018 M550. I downloaded the instructions from ISTA but am having a bit difficulty understanding the Torque spec,, attaching the screen shot below,, not sure what the sequence is recommended,, tighten plus angle than unscrew ?? any help would be appreciated.." pretty sure i am not reading it right. Attached Images
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11-14-2023, 10:21 AM	#2
B58 parts Captain 477 Rep 797 Posts Drives: '17 340ix 6MT Join Date: Nov 2017 Location: US iTrader: (0)	Yeah this is a good one. What I'm stuck on is the word crosswise. Does that mean you do each set of two bolts evenly, do the inside set then spin it over and do the outside set. Or does that mean you kind of do all four together and keep rotating in and out, crossing around, don't know. You're going to have to find someone that is really familiar with this procedure. Gun to my head if I had to do it I would do the inside bolts, and then rotate it and do the outside bolts all those same steps. Tighten them both evenly to 20 then 140, break them loose about 30° and then tighten them evenly again to 120 and then another 90°. Aren't torque to yield bolts fun. I don't know what they mean by crosswise for this one though.
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11-14-2023, 10:27 AM	#3
g340ix Private 32 Rep 78 Posts Drives: 2017 BMW 340i xdrive Join Date: Jan 2022 Location: New York iTrader: (0)	appears to be the wonrg section since this is for b58's; but i read it as: replace a pair at a time, although I personally would do a cross pattern like when putting a wheel on. Tighten bolts to 20nm, basically hand-tight Then torque to 140nm Then back out each bolt by no more than 45 degrees of rotation Then tighten each bolt to 120 nm finally, tighten bolts with 90 degrees of rotation
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