Rod bearing issue thread not common in real life?

tdott · 08-01-2017, 06:06 PM

Quote:

Originally Posted by M3CRZY

Maybe the engine is not correctly designed to rev to 8k ? , I don"t rev past 5k with my S65 until I have the bearings looked at and changed , hopping this will work or help until i book it in ! Mine is the 2009 model and from what I have been told a oil test will not work because of the bearing metals where changed and metals in them don"t show up when they have wear ?

Wrong read the wiki again.

insanelin · 08-01-2017, 06:11 PM

Hi All,

in a similar situation with TS and looking at a E92 in Sydney so I am wondering how much will it cost for the RB change?

Cheers.

DOCTOR.Y · 08-01-2017, 06:14 PM

Quote:

Originally Posted by insanelin

Hi All,

in a similar situation with TS and looking at a E92 in Sydney so I am wondering how much will it cost for the RB change?

Cheers.

Hi mate, it will roughly cost 3000AUD.

DOCTOR.Y · 08-01-2017, 06:16 PM

Quote:

Originally Posted by M3CRZY

Maybe the engine is not correctly designed to rev to 8k ? , I don"t rev past 5k with my S65 until I have the bearings looked at and changed , hopping this will work or help until i book it in ! Mine is the 2009 model and from what I have been told a oil test will not work because of the bearing metals where changed and metals in them don"t show up when they have wear ?

According to my research, new bearing is from 2010 onward. New part number is 702/703, which cooper and lead are no longer existing. Instead, tin and aluminium are used. Your one should still be ok with oil analysis

DOCTOR.Y · 08-01-2017, 06:21 PM

So guys, I am now thinking of one question, maybe stupid. Since clearance is insufficient causing RB wearing, as wearing goes on, RB is getting thinner and thinner, thus there should be more clearance created for oil flow and less frictions. Like break-in, which results in a smoother surface Between metals. A bit confused

DCTerry · 08-01-2017, 06:55 PM

Quote:

Originally Posted by insanelin

Hi All,

in a similar situation with TS and looking at a E92 in Sydney so I am wondering how much will it cost for the RB change?

Cheers.

3700 for me but that included a few add ons.

OzCraig · 08-01-2017, 06:57 PM

Quote:

Originally Posted by insanelin

Hi All,

in a similar situation with TS and looking at a E92 in Sydney so I am wondering how much will it cost for the RB change?

Cheers.

Have a chat with Alastair at Bromspec in Brookvale.
Drop it off on a Friday, pick it up Monday.
Tell him Crag with the grey E90 sent you

Cheers,
Craig

DCTerry · 08-01-2017, 07:42 PM

Quote:

Originally Posted by OzCraig

Have a chat with Alastair at Bromspec in Brookvale.
Drop it off on a Friday, pick it up Monday.
Tell him Crag with the grey E90 sent you

Cheers,
Craig

This

jmo · 08-01-2017, 08:17 PM

Quote:

Originally Posted by American Dave

the bearing shells are not meant to be a wear part LOL

How so? Metal rubbing against other metal at up to 8,500rpm with a thin layer of oil in between. They can't last forever?

Are there pics of rod bearings from other cars at the same KM we could use as a comparison? Especially high revving V8's like the RS4?

Has anyone on this (aussie) forum had rod bearing failure?

insanelin · 08-01-2017, 08:18 PM

awesome guys!

Thanks for the quick response!

I will promise to arrange a meet up once I get mine!

TheMidnightNarwhal · 08-01-2017, 08:49 PM

Quote:

Originally Posted by dnbosiris

Many people on original bearings with over 100k miles or 150k kms who have no issues. But everyone who does them says how glad they are that they did it. Personally I'd do some used oil analysis and monitor it before forking out $4k unnecessarily.

That's the thing. What if when people mention how they look and how bad they are, they're actually not? 🤔

XIX · 08-01-2017, 09:03 PM

Quote:

Originally Posted by Dr.Y_340

So guys, I am now thinking of one question, maybe stupid. Since clearance is insufficient causing RB wearing, as wearing goes on, RB is getting thinner and thinner, thus there should be more clearance created for oil flow and less frictions. Like break-in, which results in a smoother surface Between metals. A bit confused

Sorry it hasn't been proven that clearance is the issue. Some people have assumed that is the case, but in reality no one knows the actual issue, only that there is one.

TheMidnightNarwhal · 08-01-2017, 09:15 PM

Quote:

Originally Posted by XIX

Sorry it hasn't been proven that clearance is the issue. Some people have assumed that is the case, but in reality no one knows the actual issue, only that there is one.

Yeah right, since VAC bearings look fine after being pulled? People say it's the rods now.

It's such a damn clusterfuck, not only you have to choose on if you do replace them or not, but then there is 2 main brands.

I guess I'll just go with what the shop near carries and does.

M3CRZY · 08-01-2017, 09:28 PM

Quote:

Originally Posted by tdott

Wrong read the wiki again.

I have had a look at that before , but do not understand all of it ,cos it's way past my pay grade !! . Huge amounts of information from those guys . They professionals in there fields. Whats the short conclusion again ? eg bearing replacement types ? and oil recommended ? . But I will have another look , thx .

Nugget · 08-02-2017, 12:20 AM

I had mine replaced at ~89k. They weren't horrible but not great either.
Then had a main bearing go 6 months later.
Needed a whole new engine.

Trance · 08-02-2017, 12:26 AM

Quote:

Originally Posted by Nugget

Then had a main bearing go 6 months later.
Needed a whole new engine.

Ouch - things you don't want to read on an M3 forum!

Is this something oil sampling is able to pick up?

XIX · 08-02-2017, 12:32 AM

Quote:

Originally Posted by Nugget

I had mine replaced at ~89k. They weren't horrible but not great either.
Then had a main bearing go 6 months later.
Needed a whole new engine.

Supercharged ?

It doesnt seem the rb's have anything to do with the main bearing failure, unless improperly installed.

What rd's did you get and what bolts ? Did they source the cause of the failure ?

Nugget · 08-02-2017, 12:35 AM

It was going to be supercharged but car started knocking before I got the kit installed.
Kit was sold and money put towards new engine instead

I don't think the two were connected as an improper rod bearing installation would have taken a lot less than six months to cause issues.
Was just bad luck.

Nugget · 08-02-2017, 12:40 AM

Some pics of number one main bearing, the crack in the block underneath it and the crank shaft.

TheMidnightNarwhal · 08-02-2017, 12:48 AM

Wow wtf I would be so pissed if I change rod bearings then it still RIP because of main bearing.

XIX · 08-02-2017, 02:46 AM

Quote:

Originally Posted by Nugget

Some pics of number one main bearing, the crack in the block underneath it and the crank shaft.

mother of god!

Did you work out what the issue was ? This a very rare occurrence from what I have seen.

Can you give some background on the car, usage, oil changes etc ?

Sorry to hear mate, must have been a real bummer!!

M3CRZY · 08-02-2017, 03:15 AM

http://www.m3post.com/forums/showthread.php?t=892838

Official S65 Bearing Specification/Clearance Wiki

Anyone like to know or can anyone tell what Oil we should be using and also the RB and bolts in this post ??

She"s a big post .

08-01-2017, 06:11 PM	#24
insanelin Registered 0 Rep 3 Posts Drives: Megane RS 275 Trophy Join Date: Jul 2017 Location: Sydney iTrader: (0)	Hi All, in a similar situation with TS and looking at a E92 in Sydney so I am wondering how much will it cost for the RB change? Cheers.
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08-01-2017, 06:21 PM	#27
DOCTOR.Y Eric_Y 103 Rep 456 Posts Drives: 2016 340i, 2010 E92 M3 Join Date: Sep 2015 Location: Sydney iTrader: (0) Garage List 2016 bmw m3 f80 [0.00] 2010 M3 E92 [0.00]	So guys, I am now thinking of one question, maybe stupid. Since clearance is insufficient causing RB wearing, as wearing goes on, RB is getting thinner and thinner, thus there should be more clearance created for oil flow and less frictions. Like break-in, which results in a smoother surface Between metals. A bit confused
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08-01-2017, 08:18 PM	#32
insanelin Registered 0 Rep 3 Posts Drives: Megane RS 275 Trophy Join Date: Jul 2017 Location: Sydney iTrader: (0)	awesome guys! Thanks for the quick response! I will promise to arrange a meet up once I get mine!
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08-02-2017, 12:20 AM	#37
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	I had mine replaced at ~89k. They weren't horrible but not great either. Then had a main bearing go 6 months later. Needed a whole new engine.
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08-02-2017, 12:35 AM	#40
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	It was going to be supercharged but car started knocking before I got the kit installed. Kit was sold and money put towards new engine instead I don't think the two were connected as an improper rod bearing installation would have taken a lot less than six months to cause issues. Was just bad luck.
	Appreciate 0 Quote

08-02-2017, 12:40 AM	#41
Nugget Colonel 650 Rep 2,601 Posts Drives: G81 M3 Touring, GR Supra GTS Join Date: Jan 2012 Location: Perth iTrader: (2) Garage List 2011 BMW 135i [10.00]	Some pics of number one main bearing, the crack in the block underneath it and the crank shaft. Attached Images
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08-02-2017, 12:48 AM	#42
TheMidnightNarwhal Major General 2659 Rep 6,290 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	Wow wtf I would be so pissed if I change rod bearings then it still RIP because of main bearing. Last edited by TheMidnightNarwhal; 08-02-2017 at 01:13 AM..
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08-02-2017, 03:15 AM	#44
M3CRZY Private 20 Rep 86 Posts Drives: 2008 M3 E92 Join Date: Oct 2014 Location: Australia iTrader: (0)	http://www.m3post.com/forums/showthread.php?t=892838 Official S65 Bearing Specification/Clearance Wiki Anyone like to know or can anyone tell what Oil we should be using and also the RB and bolts in this post ?? She"s a big post . Last edited by M3CRZY; 08-02-2017 at 04:39 PM..
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