Blown motors, Rod Bearing failure S65 Registry.

[mistab]

Originally Posted by MMachines

I'm late to the game now that you've got an oil filter housing picture but water in the engine would have gotten in there somehow, are there any signs of moisture/dirt/etc in the intake, air box, filter wet or dirty?

Filter looked dirty in the pictures, but dry. This happened on the 27th.

Looks like the mechanic has screwed me over. My only recourse now is finding water damage, but it's looking more like a new engine.

To note, when I tried to jump it after it died, it tried to start but smoke eventually came from indeed the intake.

Thanks for the input guys

[deansbimmer]

Before trying to lay blame on the mechanic, he didn't "finish off" your engine. It was dead when it died out in the mud. At that point the failure had already occurred.

[mistab]

Originally Posted by deansbimmer

Before trying to lay blame on the mechanic, he didn't "finish off" your engine. It was dead when it died out in the mud. At that point the failure had already occurred.

Sounds like it. I have accepted that it's cooked just praying it can be blamed on water damage

[Bartledoo]

Originally Posted by deansbimmer

Before trying to lay blame on the mechanic, he didn't "finish off" your engine. It was dead when it died out in the mud. At that point the failure had already occurred.

I was half joking. Obviously the engine was f'd when the mechanic received it...But it seems like he did "finish it off" since it totally seized when he managed to get it running briefly.

[RedScytheM3]

Originally Posted by Bartledoo

I was half joking. Obviously the engine was f'd when the mechanic received it...But it seems like he did "finish it off" since it totally seized when he managed to get it running briefly.

More like put it out of its misery?

[Bartledoo]

Originally Posted by RedScytheM3

More like put it out of its misery?

Yes! RIP

[pbonsalb]

http://www.m3post.com/forums/showthread.php?t=1506381

[blueskies]

it's with great regret that i have to post this. Last Saturday, my S65 lost oil pressure and keeled over dead. RIP @65k miles. No warning. now looking at an expensive repair bill. i've just logged my complaint with BMW, don't expect any recourse, but had to log the complaint. get your Rod bearings replaced....

[330ciprem]

Originally Posted by blueskies

it's with great regret that i have to post this. Last Saturday, my S65 lost oil pressure and keeled over dead. RIP @65k miles. No warning. now looking at an expensive repair bill. i've just logged my complaint with BMW, don't expect any recourse, but had to log the complaint. get your Rod bearings replaced....

Sorry to hear this.

Lost oil pressure which led to engine failure?

Or the bearings spun leading to engine failure?

[byroncheung]

Originally Posted by blueskies

it's with great regret that i have to post this. Last Saturday, my S65 lost oil pressure and keeled over dead. RIP @65k miles. No warning. now looking at an expensive repair bill. i've just logged my complaint with BMW, don't expect any recourse, but had to log the complaint. get your Rod bearings replaced....

Sorry to hear... Care to share a bit more details? Usage (street / track, super charged?, oil change interval, black stone report etc?

I'm also curious has anyone been compiling all these failures into a spreadsheet? Wonder what is the distribution of the failure mileage is... what is the mean / median mileage, different percentile point etc? Will be useful to help people to decide when to change their RB based on how risk adverse he is. If no one has been doing that, might be useful to start a google sheet for that so we have the data in more summarizable format? I remember someone tried to look at the failure v.s. various thing such as oil change interval etc, someone must have compiled some spreadsheet at some point?

[pbonsalb]

I have been following failures for years and found nothing that gives any particular owners hope, other than that the odds are still extremely high that nothing will happen.

I’d guess maybe 1% of cars have failed, and not more than 2% and that another 5-10% have had rod bearings replaced preventatively.

[Helmsman]

Originally Posted by byroncheung

Sorry to hear... Care to share a bit more details? Usage (street / track, super charged?, oil change interval, black stone report etc?

I'm also curious has anyone been compiling all these failures into a spreadsheet? Wonder what is the distribution of the failure mileage is... what is the mean / median mileage, different percentile point etc? Will be useful to help people to decide when to change their RB based on how risk adverse he is. If no one has been doing that, might be useful to start a google sheet for that so we have the data in more summarizable format? I remember someone tried to look at the failure v.s. various thing such as oil change interval etc, someone must have compiled some spreadsheet at some point?

Yes there are a couple of board members logging this data.

[blueskies]

Originally Posted by byroncheung

Sorry to hear... Care to share a bit more details? Usage (street / track, super charged?, oil change interval, black stone report etc?

I'm also curious has anyone been compiling all these failures into a spreadsheet? Wonder what is the distribution of the failure mileage is... what is the mean / median mileage, different percentile point etc? Will be useful to help people to decide when to change their RB based on how risk adverse he is. If no one has been doing that, might be useful to start a google sheet for that so we have the data in more summarizable format? I remember someone tried to look at the failure v.s. various thing such as oil change interval etc, someone must have compiled some spreadsheet at some point?

the car did have a SC on it when first built, this is / was the Powerbeast car that IND built. I don't know how long the SC was on it. Oil change interval for the 3yrs i've had it has been every 5k miles . Blackstone report done 2yrs ago was solid, clearly i should have stayed on top of this better. Was on the track at the time. Shifting from 4th (~7k rpm) into 5th, then lost compression. Was my weekend car.

[Honda]

Originally Posted by blueskies

the car did have a SC on it when first built, this is / was the Powerbeast car that IND built. I don't know how long the SC was on it. Oil change interval for the 3yrs i've had it has been every 5k miles . Blackstone report done 2yrs ago was solid, clearly i should have stayed on top of this better. Was on the track at the time. Shifting from 4th (~7k rpm) into 5th, then lost compression. Was my weekend car.

supercharged!! thats probably way as you are adding more strain on the engine

[Mvy]

Originally Posted by Honda

supercharged!! thats probably way as you are adding more strain on the engine

No direct correlation has been shown between SC and rod bearing wear. Most cars that blow up never had one.

[Shredicus]

Originally Posted by Mvy

No direct correlation has been shown between SC and rod bearing wear. Most cars that blow up never had one.

I think it's pretty commonly discussed that the S/C does put a lot of stress on the #1 main bearing though

[Mvy]

Originally Posted by Shredicus

I think it's pretty commonly discussed that the S/C does put a lot of stress on the #1 main bearing though

Mains are a whole different animal. Like I said, no relationship with ROD bearings.

[jcolley]

Originally Posted by Mvy

Mains are a whole different animal. Like I said, no relationship with ROD bearings.

Well, kind of. All rod bearing oil flow passes through the upper main bearing shell to the oiling passage from the main journal to the rod journal. A main bearing moving more than about 5 degrees will block the oil supply port in the upper. Granted, that's still a main bearing failure, but leads to a pretty spectacular rod bearing failure.

[Ngilbe36]

Originally Posted by byroncheung

I'm also curious has anyone been compiling all these failures into a spreadsheet? Wonder what is the distribution of the failure mileage is... what is the mean / median mileage, different percentile point etc? Will be useful to help people to decide when to change their RB based on how risk adverse he is. If no one has been doing that, might be useful to start a google sheet for that so we have the data in more summarizable format? I remember someone tried to look at the failure v.s. various thing such as oil change interval etc, someone must have compiled some spreadsheet at some point?

I am trying to compile data using a file an old member started. It is kind of a sketchy project since sometimes we never get the whole picture or all the data. It still needs a lot of work, I dont think I have half of the posts in this thread alone documented. Ill keep plugging away in my spare time.
Here is the link:
https://docs.google.com/spreadsheets...it?usp=sharing

[byroncheung]

Originally Posted by Helmsman

Yes there are a couple of board members logging this data.

would love to know who has been and get in touch and take a look at those data.

at the very least will be interesting to see if we can have some estimate the failure rate, how it relates to mileage etc...

[///M Power-Belgium]

Originally Posted by byroncheung

would love to know who has been and get in touch and take a look at those data.

at the very least will be interesting to see if we can have some estimate the failure rate, how it relates to mileage etc...

There is NO correlation to mileage . I've seen RB failures with 6K ,9K, 11K , others with 100K + miles on it .
The failure list from our small Bimmerpost community (forum) is only the tip of the iceberg ...
*The Worldwide* S65/85 RB failures , that matters ! Bimmerpost is NOT the world .
It's a German lottery ...

[byroncheung]

Originally Posted by ///M Power-Belgium

There is NO correlation to mileage . I've seen RB failures with 6K ,9K, 11K , others with 100K + miles on it .
The failure list from our small Bimmerpost community (forum) is only the tip of the iceberg ...
*The Worldwide* S65/85 RB failures , that matters ! Bimmerpost is NOT the world .
It's a German lottery ...

I understand the forum is not the world. But if there are 300+ failures documented (someone mentioned that?), we might still be able to have some statistical inference on the data. For example I'm curious if the failure is completely random (a flat failure rate curve, or other shape? https://en.wikipedia.org/wiki/Bathtub_curve )