[S4to335]

AU335..thanks for posting the TSB..that definitely helps to understand where we stand with BMW on this issue at the current time.

[O-cha]

"Does not affect power output"

[MonacoTT]

Originally Posted by O-cha

"Does not affect power output"

I can speak from experience, I think I was the first to post on this issue.

I did not experience any power loss.. just the annoying sound. I went in before the TSB has the extra clause not to replace the turbo, so I get a new rear turbo (cylinders 4, 5, 6) out of the deal.

My threads:

http://www.e90post.com/forums/showthread.php?t=104256

http://www.e90post.com/forums/showthread.php?t=106390

http://www.e90post.com/forums/showthread.php?t=113941

AU's thread with sound/video clips:

http://www.e90post.com/forums/showthread.php?t=119721

[adrock]

Subscribed. Thanks for posting up that video and the SB AU335 that helps out immensely!

[O-cha]

Originally Posted by MonacoTT

AU's thread with sound/video clips:

http://www.e90post.com/forums/showthread.php?t=119721

OK the first part of the video where hes in the engine bay is 100% normal. The sound after he lets off the gas at 3k is not.

Good luck.

[MonacoTT]

Originally Posted by O-cha

OK the first part of the video where hes in the engine bay is 100% normal. The sound after he lets off the gas at 3k is not.

Good luck.

Yeah, it's most apparent in that video near the very end when its in the car cabin, and he is revving the engine. Listen for the buzz as the RPMs wind down.

[AU335]

Originally Posted by e92phreak

AU335, I hope things work out for you.

Thanks for posting your info. Please do keep us posted.

Originally Posted by S4to335

AU335..thanks for posting the TSB..that definitely helps to understand where we stand with BMW on this issue at the current time.

Originally Posted by adrock

Subscribed. Thanks for posting up that video and the SB AU335 that helps out immensely!

No problem guys, im here to help everyone else out just as myself. Hopefully things will work out for me. I am just stunned at the whole issue and claim by the dealership saying my 2nd cat delete cause the rear turbo/wastegate noise

[ni66ale]

i think my car has that sound but i wont know until i get my car back from the body shop(got rear ended =[) but what do we do if i have it? my only mods were jb2r everything else was stock...

[Supramano]

My SA advised me that to have this probelm fixed the service tech bulletin requires them to open up a Puma case. BMWNA is investigating these wastegate failure with tuned cars. They are thinking these problems are only occuring with people who are tuning their cars. My SA tells me if they replace the turbos that the tune may eventually cook thewastegate again. Dont know how true this is, but i think i might go to the dinan tune after this. i think bmw is going to take action in people tuning their cars, they cant be handing out turbos and $10,000 ib work everytime someone blows their turbos do to tuning they cant prove.

[E82tt6]

10k is a bit overpriced for those tiny little turbos. I can't imagine they cost more than 1.2k a pop, if that.

I wonder if there's any relation between this, and running a solenoid bypass?

[DrewBert]

Originally Posted by O-cha

OK the first part of the video where hes in the engine bay is 100% normal. The sound after he lets off the gas at 3k is not.

Good luck.

Thanks god, I haven't driven my car since september so I just intalled v2 and then I noticed the ticking sound that was at the start of the video and it scared the shit out of me lol

Didn't remember it making that sound last year but I suppose the engine was always warmer

[adc]

Holy cow, I have this rattling sound - had it for the longest time. I assumed it was the exhaust valve (flap) rattling because I removed the vacuum actuator tube.

I may have to undo the golf tee mod and head down to the service department - and will keep everyone posted as to the outcome.

Edit: In case anyone is wondering, I've had this rattle since I picked my car up in Munich. I headed south towards Italy and went up the Stelvio pass the next day. Probably around 200 miles on the car.

When tackling the hairpins, I could hear this rattle - it was a little less pronounced at the time, but definitely present.

I can vouch therefore that this rattle happens on stock cars too.

[BigPum]

Just took my 335xi in yesterday for this problem. Dealership is replacing one of the turbos. SA wasn't sure which one, but when asked, he said the turbo off of 4,5,6, sounded familiar. I expected them to do the Puma case but for whatever reason, they're just going ahead with replacement at this time. SA did say that there were "a couple of bulletins on this issue". I'll post again once I get my car and the paperwork to show you guys how it was written up, etc. In the meantime, I'm in a 528i w/iDrive loaner, gotta say that car is pretty nice, even with only 230 horses under the hood.

[Siciliano611]

BigPum, did you have a piggyback or was this issue caused even with a stock config?

[HPIA4v2]

played the video clips and sure sound like when my KO3 wastegate in my A4went south, replace with KO4 and been solid for long time.
I wonder adjusting the rod may cure it for a while but more slops over time and boost won't hold consistently.
Hope BMW has some sort of guarantee agrement with Mits on those failed turbos else it'll be expensive endevour.

I just don't like the idea of by-passing one of the solenoid.

[wj4]

Please keep us posted. BTW how audible is this clicking sound when you have the music on? I saw AU335's vid and it seems like if you drive with moderate-high level of music, you will not hear it.

[BigPum]

Originally Posted by sicilianoNJ

BigPum, did you have a piggyback or was this issue caused even with a stock config?

Stock config. No mods whatsoever.

[Supramano]

if the bmw tsb says not to replace the turbos, how do the remedy the problem if the wastegate is failing. Is there someway the wastegate can be fixed without replacing the turbos?

[BigPum]

Originally Posted by wj4

Please keep us posted. BTW how audible is this clicking sound when you have the music on? I saw AU335's vid and it seems like if you drive with moderate-high level of music, you will not hear it.

The noise wasn't very audible with the windows up, I actually started to hear it in drivethru's when pulling up to the teller window, etc. Then, last week we had some warmer weather and I drove with the windows open. Could hear it everytime I shifted or decelerated. Sound is louder from passenger side but loud enough to hear from driver's seat even with wind while driving.
When I took the car in for service, all I did for the Shop Foreman was rev the engine to about 3K rpms and let off the gas, he heard the sound without opening the hood or anything. Didn't need to drive the car to reproduce sound either. AU335's vid is very good if you're trying to hear the wastegate failure. It's a higher pitch rapid tone, sounds like somethings spinning. Hope this helps. BTW, props to AU335 for posting the vids, they're right on the money!

[BigPum]

Picked my car up yesterday, everything seems much better, no noise and car pulls strong through the RPMs. The notes on my paperwork indicate that the dealership referred to SIB 11-13-07 and 11-14-07. The vacuum hoses and connections were fine, then they filed a Puma case, BMW instructed them to go ahead and replace turbo on cyclinders 4,5,6 due to faulty wastegate and sticking actuator. It was replaced with a remanufactured turbo, but I kinda expected that. At least BMW was good enough to resolve the issue and not leave me hanging. The dealership was great too. Hope this info helps others that are having this problem. If I can be of any help, PM me. Good luck!

[hotrod2448]

Do we know has it consistently been the same turbo (rear) or has the problem been on either one or both?

And what exactly is failing?

[HPIA4v2]

Originally Posted by hotrod2448

Do we know has it consistently been the same turbo (rear) or has the problem been on either one or both?

And what exactly is failing?

Don't want to read too much into this but...
If it's always the turbo on cylinder 4,5.6 that fails then Steve Dinan might be right that N54 TT engine has cylinder 6 being too hot. I like their S/W to adjust water pump speed to take care the extra heat (not too crazy about the price though)

The rattling sound is from the slop that develops on this wastegate; It's like a piece of circular thin metal that attatch to actuator rod covering the vane toward the turbine. I suppose if you extent the rod just a little you can minimize the slop but that just delaying the obvious since this thing gets hot.

I can't believe BMW put in a rebuild turbo, I think the labor is probably more than the turbo itself. Unless this Mits turbo is like $1500 a piece.