Comprehensive S85 Rod Bearing Picture Thread - Page 6 - BMW M5 Forum and M6 Forums
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post #51 of 824 Old 12th October 2013, 01:06 AM
Fiftytwoeighty
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Quote:
Originally Posted by Ogjohnsmith View Post
I have an 06 with 75k, it's an Arizona car where it 100 degrees 100+ days a year. I have a theory that the s85 rod bearings in hot climates don't suffer as much oil starvation as the s85 rod bearings in cold climates because the oil will have more viscosity. I'm awaiting my Blackstone report to add some weight to that theory.

Anyone here have worn rod bearing or high lead Blackstone report that lives in a hot climate?


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My BMWs never see winter. I'm hot in SoCal, but it's not nearly AZ hot. I am meticulous with warm up procedures in all my cars. With that said, I don't know how my s85 was treated in the early days (test drives at the dealership and wreckless techs included). My RBs were shot.

As a side note, I regularly switch to thinner oils in our SuperCharged LandCruiser (210,000 miles) for the winter months, where it lives above 8,000 ft.

I'm still running 10w60 but not Castrol. Instead, I'm on Motul 7100T. I'm 4,000 miles post-rod bearing replacement and I'm still burning ZERO oil. I just returned from a blast across The Nevada Desert and burned ZERO oil. I'm about to do my 2nd oil change post-bearings and send a sample to BS for analysis.

I've thought about going to a thinner oil, (per m3post) but my s85 never sees cold temperatures.

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post #52 of 824 Old 12th October 2013, 01:15 AM
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So, what about folks that are still under warranty?

Quote:
Originally Posted by jcolley View Post
The hottest climate on earth won't thin TWS enough. Visibility has increased on the rod bearing issue in the last few months. Funny, BMW AG specified more frequent oil change intervals recently. Oh yeah, they recommend thinner oil now too.

If I had an S85 in any climate, any conditions, any number of owners, anywhere in the world, I would change the rod bearings out preventatively and switch to thinner oil. There's enough documentation floating around now that the notion of this being pure speculation is starting to go away. They got our money when we bought the car, they got our money with TWS, now they get more with parts. At least the improved visibility of the subject may save a few engines from here on out.
My car has 1 1/2 years left on the extended warranty and it had elevated lead at 23, 2 oil changes ago. It was down within normal parameters at the next oil change but i am concerned that could be because it wore off.
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post #53 of 824 Old 12th October 2013, 05:29 AM
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This whole rod bearing thing I am sure has taken a toll on owners on this board. I know I've thought about running alternative oils for the past week or so. Along with researching what can be done to fix/ban-aid the problem, etc. I am simply sick of it, honestly! lol. I spoke with the shop foremens at my work and upper shop management no one has heard ANYTHING about this new oil recommendation. Most likely because BMW hasn't issued a bulletin about it.

This ish really sucks. Looks like I shall be continuing to send in my oil for analysis to Blackstone Labs for the rest of my ownership lol.


Anyone get lead levels in the 20's PPM range before? Just curious.

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post #54 of 824 Old 12th October 2013, 05:53 AM
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I have put 2k miles on my new engine and checked the oil level and it still reads .8L

Before I would have had to add a quart in the next 500 miles.

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post #55 of 824 Old 12th October 2013, 01:37 PM
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I am not sure if it is a good or bad thing but I never have to add oil between 5k oil changes using TWS. 32k total miles.

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post #56 of 824 Old 12th October 2013, 02:00 PM
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Looking at these pics again, I'm happy my car in on Raikku's lift to get this **** sorted.



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post #57 of 824 Old 12th October 2013, 02:38 PM
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post #58 of 824 Old 12th October 2013, 03:05 PM
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Quote:
Originally Posted by PRM5 View Post
Oil consumption has nothing to do with rod bearing wear.
Agreed. I do think it is odd though that some of these engines will burn alot of oil and some will burn very little. Mine stopped burning oil at 20k miles. Before that I had to add a liter between changes.

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post #59 of 824 Old 12th October 2013, 03:09 PM Thread Starter
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Quote:
Originally Posted by bayerischemotor View Post
Looking at these pics again, I'm happy my car in on Raikku's lift to get this **** sorted.
You couldn't be in better hands. Post the pics here.
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post #60 of 824 Old 12th October 2013, 03:58 PM
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Quote:
Originally Posted by jcolley View Post
You couldn't be in better hands. Post the pics here.
I know!

Yes, he'll take pics, and I'll take pics.

It's a double treat for me, as I'm not only getting new bearings but also long tube headers!

Can't wait! Hurry up Raikku will you!



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Last edited by bayerischemotor; 12th October 2013 at 03:59 PM.
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