M550 Wheel Bearing,,,, lil help

murmur · 11-13-2023, 05:50 PM

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 untighten ?? any help would be appreciated..

clegg · 11-14-2023, 07:37 AM

No expert here but, that appears a spec to reuse the T60 bolts. I use new bolts and torque to 140nm and then 90 degrees.

Whenever there is an angle spec, they are stretch bolts.

admranger · 11-15-2023, 09:09 PM

Torque to 140nm, unscrew just a little, no more than 45 degrees, tighten to 120nm, then tighten 90 degrees more.

BTW, how many miles on the car?

n-hampt4 · 11-16-2023, 08:57 PM

Initial torque is just to seat the bearing. Then release the fasteners. And then final torque which which will also stretch the fastener.

JuniorTech · 11-21-2023, 11:42 AM

Quote:

Originally Posted by murmur

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 untighten ?? any help would be appreciated..

dont forget replace bolt ...

11-13-2023, 05:50 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)	M550 Wheel Bearing,,,, lil 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 untighten ?? any help would be appreciated.. Attached Images
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11-14-2023, 07:37 AM	#2
clegg First Lieutenant 87 Rep 301 Posts Drives: 335i E92, 435i F32,X5 F15 Join Date: Apr 2019 Location: O'Fallon, MO iTrader: (0)	No expert here but, that appears a spec to reuse the T60 bolts. I use new bolts and torque to 140nm and then 90 degrees. Whenever there is an angle spec, they are stretch bolts.
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11-15-2023, 09:09 PM	#3
admranger Retired Curmudgeon 2985 Rep 4,047 Posts Drives: ‘19 X3M40i, ‘18 m550i Join Date: May 2011 Location: Las Vegas, NV iTrader: (1)	Torque to 140nm, unscrew just a little, no more than 45 degrees, tighten to 120nm, then tighten 90 degrees more. BTW, how many miles on the car? __________________ '19 X3 M40 Carbon Black/Oyster, '23 Jeep Grand Cherokee L Summit, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS
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11-16-2023, 08:57 PM	#4
n-hampt4 New Member 17 Rep 21 Posts Drives: 2017 540i Join Date: Feb 2023 Location: Edmonton, AB iTrader: (0)	Initial torque is just to seat the bearing. Then release the fasteners. And then final torque which which will also stretch the fastener.
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