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E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm}


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Old Wed, Nov-23-2016, 01:13:45 AM   #31
SYT_Shadow
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Default Re: New m3 and rod bearings

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Originally Posted by nickt5174 View Post
is the Blackstone analysis the only way to determine if your bearings are are going bad or not? If I was looking at car to purchase what are the signs that I would have to look out for?
there is no way to tell other than regular blackstone analysis if you have a pre 2010 car.

Edit: as pbonsalb below says, even that is not 100%. I think replacing the bearings is a must do

Last edited by SYT_Shadow; Wed, Nov-23-2016 at 12:42:38 PM.
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Old Wed, Nov-23-2016, 12:38:04 PM   #32
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Default Re: New m3 and rod bearings

An unfortunately, blackstone is not infallible. Cars with good tests gave failed. Theoretically it should work for early cars, but its not certain. You can read all about it on m3 post dot com
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Old Thu, Nov-24-2016, 04:42:50 AM   #33
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Default Re: New m3 and rod bearings

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Originally Posted by pbonsalb View Post
An unfortunately, blackstone is not infallible. Cars with good tests gave failed. Theoretically it should work for early cars, but its not certain. You can read all about it on m3 post dot com
I think Blackstone is measuring things correctly. However, the action limits are not well known. Especially true on the aluminum bearing cars.
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Old Tue, Nov-29-2016, 07:36:57 PM   #34
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Default Re: New m3 and rod bearings

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Originally Posted by GO SENNA View Post
So if you have a 2010+ are the rod bearings ok or do you have to plan on replacing them regardless of year? Also will the aftermarket rod bearings last the life of the motor, or is this a constant maintenance item?

I am starting to consider a V8 M3 after loving my E46. At least I should not have to worry about the rear subframe or vanos issues.
You have to plan on replacing regardless of age of car, even the revised bearings in the 2010+ cars will fail eventually. Aftermarket rod bearings will suffer from wear and require replacing also. Its not a regular service item of course, but something to consider after some years/heavy mileage intervals. Its all relevant to how long you keep your car and use it.
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Old Thu, Dec-01-2016, 03:50:44 AM   #35
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Default Re: New m3 and rod bearings

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Originally Posted by jason912 View Post
You have to plan on replacing regardless of age of car, even the revised bearings in the 2010+ cars will fail eventually. Aftermarket rod bearings will suffer from wear and require replacing also. Its not a regular service item of course, but something to consider after some years/heavy mileage intervals. Its all relevant to how long you keep your car and use it.
I replaced my 2011 E90M3 rod bearings at 35k miles. Scary ugly and I did oil changes at 1/2 factory recommended intervals.

If you buy an E9xM3, you need to budget in an aftermarket warranty or a rod bearing job. Book it.
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Old Thu, Dec-01-2016, 01:10:21 PM   #36
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Default Re: New m3 and rod bearings

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Originally Posted by admranger View Post
I replaced my 2011 E90M3 rod bearings at 35k miles. Scary ugly and I did oil changes at 1/2 factory recommended intervals.

If you buy an E9xM3, you need to budget in an aftermarket warranty or a rod bearing job. Book it.
Agreed, My E60 M5 is on 64k miles....not long had the car but its on my to do list very soon. Your situation just makes it even more applicable. Low mileage with bearings in bad shape just shudnt be happening in these cars if you consider the price you pay for them. Price to pay for high performance M engines I guess.
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Old Thu, Dec-01-2016, 06:01:43 PM   #37
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Default Re: New m3 and rod bearings

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Originally Posted by jason912 View Post
Agreed, My E60 M5 is on 64k miles....not long had the car but its on my to do list very soon. Your situation just makes it even more applicable. Low mileage with bearings in bad shape just shudnt be happening in these cars if you consider the price you pay for them. Price to pay for high performance M engines I guess.
All high performance engines have their issues. It's a shame, but rod bearings aren't that difficult to replace

I'll do an E60 in Q1 2017 with the BE bearings

The most important thing is it seems like these BE bearings solve this issue once and for all. I'll probably open mine up after 50-70k to take a peek
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Old Fri, Dec-02-2016, 02:50:55 AM   #38
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Default Re: New m3 and rod bearings

What are the BE bearings you speak of? How do you guys have confidence in some aftermarket part in the middle of you engine?
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Old Fri, Dec-02-2016, 03:13:39 AM   #39
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Default Re: New m3 and rod bearings

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What are the BE bearings you speak of? How do you guys have confidence in some aftermarket part in the middle of you engine?
Let me f'n google that for you... BE Bearings Website

And the answer is yes, I'm comfortable enough that I have a set in my S65 right now. I sure as hell don't trust the numbskulls at BMW who have screwed it up on two generations of M3s and at least one generation of M5's.
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Old Fri, Dec-02-2016, 11:41:34 AM   #40
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Default Re: New m3 and rod bearings

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Originally Posted by Rez View Post
What are the BE bearings you speak of? How do you guys have confidence in some aftermarket part in the middle of you engine?
They are made by clevite, which made the original bearing. The clearance is increased by a few 1000s of an inch, closer to industry standards for the journal size.
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Discussing New m3 and rod bearings in the E90 M3 (Sedan) | E92 M3 (Coupe) | E93 M3 (Convertible) (2008-2013) Forum - {Engine: S65 - Max Hp: 414 hp (420 hp Euro) at 8,300 rpm / 295 lb/ft at 3,900 rpm} at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)