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      11-03-2019, 02:28 PM   #1
charlis777
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Con rod bearings anyone done them?

Has anyone replaced their con rod bearings on F10 M5.
Couldn't find any post with that, Are they as problematic as E60?
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      11-04-2019, 01:45 AM   #2
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Quote:
Originally Posted by charlis777 View Post
Has anyone replaced their con rod bearings on F10 M5.
Couldn't find any post with that, Are they as problematic as E60?
I've done mine. I don't think they are as problematic as the e60 but they certainly do have their issues. I started a few threads regarding the subject.
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      11-04-2019, 01:13 PM   #3
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Quote:
Originally Posted by Dwaynos View Post
I've done mine. I don't think they are as problematic as the e60 but they certainly do have their issues. I started a few threads regarding the subject.
Could you send me a link to those threads? Thanks
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      11-04-2019, 02:07 PM   #4
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Quote:
Originally Posted by charlis777 View Post
Could you send me a link to those threads? Thanks
Just had a look through. Turns out I didn't start a proper thread on this, just commented in other threads. The only 2 i started with regards to rod bearings were 1 where I shared the price of the parts and another where I queried a bearing manufacturer's reputation. I doubt either of these will be of any use to you.

If you have any questions though feel free to ask and I will try to answer as best I can.
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      11-08-2019, 04:56 AM   #5
technician117
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Quote:
Originally Posted by Dwaynos View Post
Just had a look through. Turns out I didn't start a proper thread on this, just commented in other threads. The only 2 i started with regards to rod bearings were 1 where I shared the price of the parts and another where I queried a bearing manufacturer's reputation. I doubt either of these will be of any use to you.

If you have any questions though feel free to ask and I will try to answer as best I can.
I forgot that you got this done. I remember you were buying parts but didn't realize the work was done. Obviously no issues. Posting a basic DIY in here would be cool if you have the time.
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      11-08-2019, 12:18 PM   #6
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I forgot that you got this done. I remember you were buying parts but didn't realize the work was done. Obviously no issues. Posting a basic DIY in here would be cool if you have the time.
My intention was to do a full write up but never got round to taking pictures. I did it back in July and just wanted to get the job done as my back was giving me grief. It's not the most difficult rod bearing job I've done but certainly up there, theres quite a bit of stuff to remove.

Rod bearings are appearing to be more of an issue as this platform gets older. Mine were absolutely perfect at 47k but it's been serviced around every 8k before I got it and every 3-5k miles during my ownership. It obviously goes on warm up cycles aswell, my car was obviously treated well by its previous owners, despite there being more than the average amount.

I could do a write up but I'm unsure what to cover now at this point, feels meaningless without images to go with it. I can give advice and answer any questions people may have. I'm not an expert with this engine but rod bearings are rod bearings I guess. I did use plastigauge on every rod to check clearance during the process.

I don't regret replacing mine even though there was nothing wrong with them. As more threads pop up with engines going bad I can relax knowing that mine are ok. Not saying something else won't go wrong though. Every service i fully inspect the oil filter and housing for debris/swarf and always good, next service is due very soon so hopefully this trend continues.
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      12-12-2019, 04:26 AM   #7
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Might be a good shout getting the bearings done around at around the 50k mark.
What sort of time did it take to do them and what cost?
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      12-12-2019, 09:08 PM   #8
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Here's why my indy shop quoted:

Customer states: estimate to replace rod bearings 3,903.81
Labor Service - General Labor 2,990.00
New 10W60 BMW Motorsport Oil 10w60 10.00 12.95 129.50
New 11 42 7 583 220 Oil Filter Kit w/ O-Ring 1.00 23.65 23.65
New 8B1578HX ACL S63tu bearings 1.00 368.58 368.58
New 11 24 7 845 511 connecting rod bolt 16.00 9.89 158.24
New 11 31 7 690 476 oil return pipe o-ring (Jacksonville) 1.00 5.61 5.61
New 11 13 7 843 145 Oil Pan Gasket 1.00 29.48 29.48
New 07 12 9 905 558 Bolt TORX w/ Washer (1 day out) 2.00 1.31 2.62
New 07 12 9 909 333 Bolt M8x25-U1-8.8 (1 day out) 19.00 2.39 45.41
New 07 12 9 909 348 Bolt M8x45mm (1 day out) 6.00 2.36 14.16
New 11 13 7 843 149 Oil Pan Gasket 1.00 29.48 29.48
New 07 12 9 909 551 Oil Pan Bolt 22.00 2.72 59.84
New 11 12 1 304 174 Oil Pick-up Tube O-Ring 1.00 6.29 6.29
New 12 61 1 744 292 Oil Level sender O-ring 1.00 6.58 6.58
New 17 22 2 284 079 Oil Cooler Seal (1 day out) 2.00 4.19 8.38
New BMW COOLANT BMW Anti-Freeze/Coolant 1.00 25.99 25.99
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      12-12-2019, 09:30 PM   #9
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Rod bearings have been somewhat of an issue on M motors since the late 90's w/ the e46 M3 and the S54 engines. It's crazy to me that they haven't gotten it right in nearly 30 years...which leads me to believe, it's not a mistake, or an error in engineering. It leads me to believe that maybe BMW thinks RB's should be replaced as a consumable item - or - these engines were designed to operate within a certain environment with minimal variability.

In addition to tight tolerances, I think maintenance, oil, and environment (closely related to oil) all play a key role here. Warm up your car properly to get the oil flowing, choose the right oil for your application; (in a colder climate, probably want to go w/ a lighter oil)

I think if you do those things, from Day 1, and this is why maintenance records and frequent oil changes (every 5-7k, not 15k miles) are so important, your RB's should last a long time.
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      12-13-2019, 02:18 AM   #10
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Quote:
Originally Posted by F10CPROG View Post
Might be a good shout getting the bearings done around at around the 50k mark.
What sort of time did it take to do them and what cost?
It took me around 10 hours, checking clearances on every bearing and a few coffee breaks. Total cost for me was around 380. That includes oil, oil filter, all necessary bolts and seals and obviously the bearings themselves. I opted for ACL bearings.
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      12-19-2019, 07:14 AM   #11
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Quote:
Originally Posted by Dwaynos View Post
It took me around 10 hours, checking clearances on every bearing and a few coffee breaks. Total cost for me was around 380. That includes oil, oil filter, all necessary bolts and seals and obviously the bearings themselves. I opted for ACL bearings.
The cost is very reasonable. It's the labor that keeps more people from doing bearings as PM. If I couldn't do my own work, I probably couldn't afford to run M cars! I put on a lot of miles which means more frequent maintenance.

Cheers to you for also being able to do your own bearings. It's a good feeling when it's done!
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      03-06-2020, 01:02 PM   #12
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Did this on my 06 e60 as "preventative"...once opened up...glad I opted to it. However, sold the e60 shortly thereafter #MissYouIndyRed
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