[sukutash]

Saw This As Another Potential Option.

[ptpending]

Originally Posted by montr

If the original BMW is likely to fail, why do you recommend buying it?

in a europe we have more 50% of cars with diesel engine
so this is well known problem on BMW diesels from 2000 year
if you install some dayco, vaico, febi made vibration pulley - it may last only 20000 km , while original BMW(Corteco made) - 120000-200000 km.

[QUIKDZL]

What's a Happy Robot?

[CvilleBill]

Originally Posted by sukutash

Saw This As Another Potential Option.

That is an interesting option. I ordered the Febi, but probably would have gone with this if I had found it. I trust Gates products. Found it on UK ebay for ~260.00. The problem would be waiting for shipping.

[ptpending]

Originally Posted by QUIKDZL

What's a Happy Robot?

http://www.e90post.com/forums/attach...1&d=1310840943

[BB_cuda]

Originally Posted by shnaggs

Uhh, doesn't that look like the flange is snapped off the crank? Or am I missing something?

Ignore the red arrow in the picture. The larger diameter pulley to right of "arrow" pulley is what you see in the video. It has three bolts, not four. This photo is courtesy of chau from the first of these 3 threads. He explains to yozh where/how to unload the serpentine belt close to the red arrow pulley. Thanks chau for picture.

[petey_highboost]

Sorry but Id rather not spend the $450 for the crank pulley and fail again. I bought an aftermarket unit from germanautoparts (local to me) got the pulley and both belts for $289 with tax. (Not saying it won't fail)

Talked about this issue with Jess of Bohl diesel performance and he said he might have something up his sleeve coming out soon in regards to a crank pulley.. And something about a group buy.. We shall see

[montr]

The crank pulley issue remind me of a previous car (long time ago), a Volvo 850 turbo.
Many owners were having failure with the coolant thermostat. Many posters were saying that the best thermostat is the OEM. I decided to replace mine with an aftermarket from NAPA and had no problem for the time I owned the car. The ones that decided to go the OEM route saw the same failure repeating again and again.

[Lexx.md]

I am very glad i have read this topic, at least i will know what to expect in future.

Maybe it is a good reason to order and keep a spare damper at home

[BB_cuda]

I would like to understand the dampner design. Some misuse the term as a balancer but it really depends on the engine's design. Not to bore you with my Mopar stuff (again!) but some engines like a 340, 383, 426 hemi, 440 wedge were zero or also called internal balance engines. Others like 360 and 400 were external balance. Internal balance ones don't have compensating mass on the front dampner and flywheel. So, l'm wondering which the M57 engine is. My guess is internal balance.
If our front pulley is only a dampner, I understand how this opens things up on the Bohl front.

[NC335d]

Can someone share the part #'s for this fix. Thanks!!

[Lexx.md]

Originally Posted by NC335d

Can someone share the part #'s for this fix. Thanks!!

From the previous page

Originally Posted by montr

Yes, likely the pulley. Mine failed at 67K miles, replaced 11-23-8-511-371 vibration damper

[Lexx.md]

Originally Posted by BB_cuda

I would like to understand the dampner design. Some misuse the term as a balancer but it really depends on the engine's design. Not to bore you with my Mopar stuff (again!) but some engines like a 340, 383, 426 hemi, 440 wedge were zero or also called internal balance engines. Others like 360 and 400 were external balance. Internal balance don't have compensating mass on the front dampner and flywheel. So, l'm wondering which the M57 engine is. My guess is internal balance.
If our front pulley us only a dampner, I understand how this opens things up on the Bohl front.

As i understand balancers have some internal masses which compensate any disbalance.

For ours it looks for me like just a dumper, two metal pieces glued with the rubber.
This design has to fail at some point, seen same problem on BMW E38 750.

Personally i believe they could do some internal splints so when rubber fails it still will have some grip even if will be making noise but still to be drivable .

[glitdi]

Originally Posted by BB_cuda

So, l'm wondering which the M57 engine is. My guess is internal balance.
If our front pulley us only a dampner, I understand how this opens things up on the Bohl front.

I doubt very much the m57 is internal balance, being an inline 6 and a bimmer motor it most likely already has some torsional vibration advantages over something like a cummins I6. Bieng a diesel engine and the I6 one of the more balanced engines but in order to make it balance internally they would most likely have to use a countershaft system internally in the engine.
What I am curios about is it only the guys with a tune on there engine are getting failures out of these dampers? When you increase power you increase torsional/rotational forces on the crank and can show themselves in the crank, cracked fillets, broken crank etc.. the dampner is there to carry the engine through to the next power stroke and smooth out power pulses.Maybee the stock balancer cannot keep up? Anyone had one of these in there hand? Are they made of rubber externally or is it metal? most diesel engines (heavy duty mind you) use a fluid type dampner consisting of a metal shell with a rubber centre encased in silicone fluid. I would hope bimmer would have ponied up for something like this for our car although i am skeptical... We need this... http://www.fluidampr.com/what/
I am sure its been discussed here with someone before so I am probably regurgitating old information..(Appoligies)but on the off chance I am not.... They have a great product.. Just dont know if they would even bother with our engines. Perhaps with the european having a tonne of these failures it may be worth while for them.

[335D Alpha Pappa]

Originally Posted by NC335d

Can someone share the part #'s for this fix. Thanks!!

https://www.ecstuning.com/BMW-E90-33...ngine/Pulleys/

Crankshaft Pulley With Vibration Damper

Product Details:

Every time the cylinders fire, torque is transferred into the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torque imparted by the cylinders are in synch with the vibrations in the crankshaft, which results in a phenomenon called resonance This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure. The accessory pulley acts as a balancer and prevents these vibrations from destroying your crankshaft.


BMW - 11238511371

[Lexx.md]

Lets discuss our options and what is better.

- OEM (11238511371) - OEM Quality but still will fail at some point

- Febi - i know that it is a trusty aftermarket

- Vaico - have no idea what it is but on ecstuning in description they have: Improved design offering improved heat resistance, oil sealing, and overall durability!

- Gates (TVD1050) - I know gates as belt productions, never used it

- CORTECO - available on ebay, price near as OEM, and somebody told that it is a OEM supplier

- Ebay also offers non-branded parts, personally i would go with parts where they are not ashamed to put a name on

What are your thoughts?

I would like to see meyle version and i would go for it.

[NC335d]

Originally Posted by 335D Alpha Pappa

https://www.ecstuning.com/BMW-E90-33...ngine/Pulleys/

Crankshaft Pulley With Vibration Damper

Product Details:

Every time the cylinders fire, torque is transferred into the crankshaft. The crankshaft deflects under this torque, which sets up vibrations when the torque is released. At certain engine speeds the torque imparted by the cylinders are in synch with the vibrations in the crankshaft, which results in a phenomenon called resonance This resonance causes stress beyond what the crankshaft can withstand, resulting in crankshaft failure. The accessory pulley acts as a balancer and prevents these vibrations from destroying your crankshaft.


BMW - 11238511371

Thanks buddy! I think I'm just going to wait for mine to mess up, I'm about to hit 60,000 miles next week. I have CPO on my car until June 2017, not sure if it's going to be worth a damn thing though. If and when it starts to be a problem, I'll take it to the local stealership, if they refuse to warranty it, I'll just take it to BPC around the corner from them and probably go with an aftermarket manufacturer and replace all my belts at the same time.

[locolobo]

66k and maybe I am due for this repair soon, too. The Vaico mentions improved "oil sealing." Does this part form part of the crankshaft seal? Has anyone done this replacement DIY ?

[335D Alpha Pappa]

I am at 78k so I must be in the red zone. I will wait until 100k before I change it and then it will be a series of parts to change.

Never thought a crankshaft pulley would be a maintenance item.

I may buy it now and wait to change it because only the 335d and x5d are listed for this part. Will all of the options be available later when its needed or will I be left looking on ebay for used parts? The day I have to look on ebay for replacement parts is the day I dump this car.

[BB_cuda]

okay, I've been scouring the net. First thing, this thing is neutral balance. I see no drilled holes along one side like you do on external balance ones. I also found a description on Rockauto that says neutral balance. I googled on OEM p/n given above. I eventually came across corteco 80001103. I found a pdf explaining about a design improvement where a heat shield was added internally.

It has holes in the rear face that I don't see on other aftermarket dampners. Example of no hole aftermarket.

I did additional searching and found many several threads where people are changing part to corteco one. Unfortunately, the threads are in eastern European language so I can't read them. they show a picture of the center piece completely torn loose from the outer piece. The first attachment does show a cross over to our OEM p/n 11238511371. Don't go run out and buy this yet or at least don't take this post as recommendation that it will work.

OP, can you take pics of your torn up unit when you get it off the car please? We all have asked what sort of signs to look for.

EDIT: I added a picture of the backside of the corteco 8001103 showing the cooling holes (it is the last pdf file, I couldn't save it as a picture)

[montr]

To glitdi, my car is stock and pulley failed at 67K miles.

A pulley failure mean that you loose power steering, AC and alternator charging. If you are not near a dealer or in the middle of a trip, you may have to call a tow truck and could loose a day or two for the repair (depend if pulley is a stock item).

In my case, pulley failed under the AC load in the middle of the summer, not far from home. I turned off the AC and I was able to reach home. I charged the battery overnight and was able to drive the car to the dealer the next day.

[petey_highboost]

Originally Posted by BB_cuda

okay, I've been scouring the net. First thing, this thing is neutral balance. I see no drilled holes along one side like you do on external balance ones. I also found a description on Rockauto that says neutral balance. I googled on OEM p/n given above. I eventually came across corteco 80001103. I found a pdf explaining about a design improvement where a heat shield was added internally.

It has holes in the rear face that I don't see on other aftermarket dampners. Example of no hole aftermarket.

I did additional searching and found many several threads where people are changing part to corteco one. Unfortunately, the threads are in eastern European language so I can't read them. they show a picture of the center piece completely torn loose from the outer piece. The first attachment does show a cross over to our OEM p/n 11238511371. Don't go run out and buy this yet or at least don't take this post as recommendation that it will work.

OP, can you take pics of your torn up unit when you get it off the car please? We all have asked what sort of signs to look for.

EDIT: I added a picture of the backside of the corteco 8001103 showing the cooling holes (it is the last pdf file, I couldn't save it as a picture)

Of course, pics will be up soon. Having it changed tonight/tomm morning