DIY F8X front wheel hub/bearing replacement

GuyLedouche · 01-12-2019, 09:41 PM

Disclaimer I am a highly trained individual, just not in auto repair. Exercise due diligence. Wear eye pro. Use jack stands. Practice safe sex. Etc.

Tools required
Torque wrenches with specs ranging from 12nm to 140nm
17mm lug socket
5mm allen
10mm socket
18mm socket
T-60 preferably impact rated

First crack the lugs and get car on jack stands.

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Remove wheel. Wheel removal tool is your friend.

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Remove caliper with 18mm socket.

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Hang caliper, avoid kinks.

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Remove rotor by removing 2 circled bolts with 5mm Allen. Use lug bolt to prevent dropping rotor on foot

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Remove dustguard if desired with 10mm socket

Remove 4 torx bolts attaching hub. Use a T-60 with breaker bar or impact

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Note tab on hub. This will locate at the bottom

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Mount new hub with NEW bolts. Torque to 120nm then tighten 90 degrees more. Mark your 90 degrees with a sharpie then tighten till your marks line up. Bolts are micro-encapsulated so no loctite required.

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Grab a beer and admire your work

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Remount dust guard with 10mm socket. Torque to 12nm. Mount rotor with 5mm Allen. Torque 2 Allen bolts to 16nm

Remount caliper with 18mm bolts. I used blue loctite then torqued to 110nm

Reinstall wheels and torque to 140nm

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Test drive and ensure nothing falls off. If anything departs the vehicle seek additional guidance.

FriedPiston · 01-14-2019, 11:52 AM

Great write up! Those wheels look super creamy!

SD ///M4 · 01-20-2019, 04:28 PM

What was the reason for replacing the hub?

GuyLedouche · 01-21-2019, 11:02 AM

Quote:

Originally Posted by SD ///M4

What was the reason for replacing the hub?

Shop destroyed the threads when installing wheels.

SD ///M4 · 01-21-2019, 12:14 PM

Quote:

Originally Posted by GuyLedouche

Shop destroyed the threads when installing wheels.

Bummer! Looks like one of the wrench monkeys didn't get the threads started well enough before blasting the lug bolts with an air-driven impact gun.

So did you have to replace the hub yourself? I can certainly understand if you didn't want them touching your car after that though.

ellipsis212 · 01-21-2019, 01:02 PM

Excellent write up and photos. No confusion and no unnecessary words.

🙏

GuyLedouche · 01-21-2019, 03:24 PM

Quote:

Originally Posted by SD ///M4

Quote:

Originally Posted by GuyLedouche

Shop destroyed the threads when installing wheels.

didn't want them touching your car after that though.

This.

BzsBimmer · 01-21-2019, 03:58 PM

Quote:

Originally Posted by ellipsis212

Excellent write up and photos. No confusion and no unnecessary words.

🙏

Agreed. And listed torque values, a rarity in many DIY’s.

DonkeyKong · 01-22-2019, 09:19 AM

This DIY deserves an Oscar nomination!!! Great DIY!!! What is the cost for a new bearing/hub?

GuyLedouche · 01-22-2019, 01:10 PM

Hub was $252 from getBMWparts

x.shell · 01-22-2019, 01:56 PM

Great DIY Mr Le Douche. I nominate for a sticky.

coldsteelrain · 03-28-2019, 10:10 AM

RustySeatbelt · 05-15-2019, 08:35 PM

Glad I found this... Thanks to getting new tires today looks like this project is in my immediate future.
At $252 did you buy the hub & bearing: https://www.getbmwparts.com/oem-part...bC1sNi1nYXM%3D

Any reason you didn't just buy the hub?
Also, which bolts did you buy? Do you have the PNs?

GuyLedouche · 05-18-2019, 08:13 AM

Quote:

Originally Posted by RustySeatbelt

Glad I found this... Thanks to getting new tires today looks like this project is in my immediate future.
At $252 did you buy the hub & bearing: https://www.getbmwparts.com/oem-part...bC1sNi1nYXM%3D

Any reason you didn't just buy the hub?
Also, which bolts did you buy? Do you have the PNs?

On the front it comes as an assembly and if you could buy separately I would still change the bearing.

31-20-6-872-920 is the PN I used.

stonecliff · 06-17-2019, 11:22 AM

Quote:

Originally Posted by x.shell

Great DIY Mr Le Douche. I nominate for a sticky.

Another thanks. Really good writeup.

Is replacing the rear wheel bearing (which has separate parts for the bearing and the hub) similarly straightforward?

tdott · 08-05-2019, 03:39 PM

Quote:

Originally Posted by stonecliff

Is replacing the rear wheel bearing (which has separate parts for the bearing and the hub) similarly straightforward?

No.

Seek additional guidance.

blockdoc · 08-09-2019, 03:19 PM

Quote:

Originally Posted by tdott

Quote:

Originally Posted by stonecliff

Is replacing the rear wheel bearing (which has separate parts for the bearing and the hub) similarly straightforward?

No.

Seek additional guidance.

I just did the fronts. Very straightforward with just hand tools and a large torque wrench.

Rear bearings require a "special tool" which is just a hydraulic extractor required to pull hub off of axle

eRocks · 08-19-2019, 06:59 PM

How are you keeping your iron rotors so clean and rust free?

bimmerboyE92 · 05-16-2021, 11:46 AM

Nice write up! Going to use this once new hubs arrive. 19k on track only car and the left front is shot.

jfritz27 · 06-08-2021, 08:03 PM

Thanks much for this.

Though I believe the 4 bolts that fasten the hub are Torx PLUS (TP) 60's. A regular T60 might work but probably would fit somewhat loosely.

bimmerboyE92 · 06-08-2021, 08:23 PM

Quote:

Originally Posted by jfritz27

Thanks much for this.

Though I believe the 4 bolts that fasten the hub are Torx PLUS (TP) 60's. A regular T60 might work but probably would fit somewhat loosely.

Hopefully my hubs will last at least a full track season. But will also get a TP60 socket when the time comes.

5ABIVT · 09-08-2021, 01:16 PM

Quote:

Originally Posted by GuyLedouche

Disclaimer I am a highly trained individual, just not in auto repair. Exercise due diligence. Wear eye pro. Use jack stands. Practice safe sex. Etc.

Tools required
Torque wrenches with specs ranging from 12nm to 140nm
17mm lug socket
5mm allen
10mm socket
18mm socket
T-60 preferably impact rated

First crack the lugs and get car on jack stands.

Attachment 1970844

Attachment 1970845

Remove wheel. Wheel removal tool is your friend.

Attachment 1970847

Remove caliper with 18mm socket.

Attachment 1970849

Hang caliper, avoid kinks.

Attachment 1970850

Remove rotor by removing 2 circled bolts with 5mm Allen. Use lug bolt to prevent dropping rotor on foot

Attachment 1970848

Remove dustguard if desired with 10mm socket

Remove 4 torx bolts attaching hub. Use a T-60 with breaker bar or impact

Attachment 1970853

Note tab on hub. This will locate at the bottom

Attachment 1970852

Mount new hub with NEW bolts. Torque to 120nm then tighten 90 degrees more. Mark your 90 degrees with a sharpie then tighten till your marks line up. Bolts are micro-encapsulated so no loctite required.

Attachment 1970853

Grab a beer and admire your work

Attachment 1970854

Remount dust guard with 10mm socket. Torque to 12nm. Mount rotor with 5mm Allen. Torque 2 Allen bolts to 16nm

Remount caliper with 18mm bolts. I used blue loctite then torqued to 110nm

Reinstall wheels and torque to 140nm

Attachment 1970855

Test drive and ensure nothing falls off. If anything departs the vehicle seek additional guidance.

Thanks for the write up ! Just noticed something interesting. I ordered a new hub/bearing assembly and new bolts. I picked up a t60plus and it fits the new bolts perfect. When I went to remove the original bolts the t60plus wouldn’t fit. Have a feeling it is a t55plus maybe ? Picking up a t60 torx as I type this as all my sets somehow ended right at t55 :facepalm:

Also, did you have to disconnect the forward control arm or suspension link ? It appears to be right in the way of one of the bolts.

Tia !

01-12-2019, 09:41 PM	#1
GuyLedouche Lieutenant 586 Rep 467 Posts Drives: F82/718 GT4 Join Date: Nov 2018 Location: NH iTrader: (2)	DIY F8X front wheel hub/bearing replacement Disclaimer I am a highly trained individual, just not in auto repair. Exercise due diligence. Wear eye pro. Use jack stands. Practice safe sex. Etc. Tools required Torque wrenches with specs ranging from 12nm to 140nm 17mm lug socket 5mm allen 10mm socket 18mm socket T-60 preferably impact rated First crack the lugs and get car on jack stands. Remove wheel. Wheel removal tool is your friend. Remove caliper with 18mm socket. Hang caliper, avoid kinks. Remove rotor by removing 2 circled bolts with 5mm Allen. Use lug bolt to prevent dropping rotor on foot Remove dustguard if desired with 10mm socket Remove 4 torx bolts attaching hub. Use a T-60 with breaker bar or impact Note tab on hub. This will locate at the bottom Mount new hub with NEW bolts. Torque to 120nm then tighten 90 degrees more. Mark your 90 degrees with a sharpie then tighten till your marks line up. Bolts are micro-encapsulated so no loctite required. Grab a beer and admire your work Remount dust guard with 10mm socket. Torque to 12nm. Mount rotor with 5mm Allen. Torque 2 Allen bolts to 16nm Remount caliper with 18mm bolts. I used blue loctite then torqued to 110nm Reinstall wheels and torque to 140nm Test drive and ensure nothing falls off. If anything departs the vehicle seek additional guidance.
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01-14-2019, 11:52 AM	#2
FriedPiston Colonel 1972 Rep 2,711 Posts Drives: Scraper Join Date: Oct 2013 Location: East Oakland, CA iTrader: (26)	Great write up! Those wheels look super creamy!
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01-20-2019, 04:28 PM	#3
SD ///M4 ///Multiple 2992 Rep 4,243 Posts Drives: M4 Coupe \| M3 \| Z4M Roadster Join Date: Jan 2011 Location: San Diego, CA iTrader: (1) Garage List 2006 BMW Z4 M Roadster [8.81] 2016 BMW M4 Coupe ( ... [10.00] 2018 BMW M3 (Euro D ... [0.00] 2011 BMW 335is Coup ... [10.00]	What was the reason for replacing the hub? __________________ The Coupe: 2016 M4 \| Sakhir Orange \| Black Full Merino Leather \| CF Trim \| M-DCT \| More \| ED 5/13/16 The Sedan: 2018 M3 \| San Marino Blue \| Black Full Merino Leather \| CF Trim \| M-DCT \| ZCP \| ED 7/18/18 The Roadster: 2006 Z4 \| Interlagos Blue \| Black Extended Nappa Leather \| Carbon Leather Trim \| Purchased 7/19/12
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01-21-2019, 01:02 PM	#6
ellipsis212 Colonel 1618 Rep 2,161 Posts Drives: 2017 M3 Join Date: Jun 2009 Location: RVA iTrader: (5) Garage List 2018 BMW M3 [0.00]	Excellent write up and photos. No confusion and no unnecessary words. 🙏
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01-22-2019, 09:19 AM	#9
DonkeyKong Private First Class 44 Rep 134 Posts Drives: 2023 G80 Join Date: May 2016 Location: US iTrader: (0)	This DIY deserves an Oscar nomination!!! Great DIY!!! What is the cost for a new bearing/hub?
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01-22-2019, 01:10 PM	#10
GuyLedouche Lieutenant 586 Rep 467 Posts Drives: F82/718 GT4 Join Date: Nov 2018 Location: NH iTrader: (2)	Hub was $252 from getBMWparts
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01-22-2019, 01:56 PM	#11
x.shell ▆ ✚✚ ▆▆▆▆▆▆ 6579 Rep 5,304 Posts Drives: ▋ ▉▉ Join Date: Nov 2012 Location: ▆▆▆ ▆▆▆ ▆ iTrader: (3)	Great DIY Mr Le Douche. I nominate for a sticky.
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03-28-2019, 10:10 AM	#12
coldsteelrain driver 816 Rep 776 Posts Drives: G80 xdrive Join Date: May 2018 Location: NJ iTrader: (4)
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05-15-2019, 08:35 PM	#13
RustySeatbelt First Lieutenant 523 Rep 321 Posts Drives: 19 ZR1 Join Date: Dec 2018 Location: Texas iTrader: (0) Garage List 2017 BMW M3 [0.00]	Glad I found this... Thanks to getting new tires today looks like this project is in my immediate future. At $252 did you buy the hub & bearing: https://www.getbmwparts.com/oem-part...bC1sNi1nYXM%3D Any reason you didn't just buy the hub? Also, which bolts did you buy? Do you have the PNs?
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08-19-2019, 06:59 PM	#18
eRocks Private 36 Rep 83 Posts Drives: '18 F80 M3 AW/MT/ZCP Join Date: May 2018 Location: EDH, CA iTrader: (0)	How are you keeping your iron rotors so clean and rust free?
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05-16-2021, 11:46 AM	#19
bimmerboyE92 Captain 412 Rep 737 Posts Drives: BMW Join Date: Oct 2014 Location: Louisville, KY iTrader: (4) Garage List 2001 Miata NB K24Z3 [0.00] 1990 Miata NA 1.8 VVT [0.00] 1995 BMW M3 [0.00] 2016 BMW M3 [0.00]	Nice write up! Going to use this once new hubs arrive. 19k on track only car and the left front is shot. __________________ F80 build journal E36 build journal Miata NB K24Z3 build Miata NA 1.8VVT build
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06-08-2021, 08:03 PM	#20
jfritz27 Major 1106 Rep 1,301 Posts Drives: 2018 F80 CS Join Date: Dec 2014 Location: New Jersey iTrader: (0)	Thanks much for this. Though I believe the 4 bolts that fasten the hub are Torx PLUS (TP) 60's. A regular T60 might work but probably would fit somewhat loosely.
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