E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Ways that turbos fail.



Reply
 
Thread Tools Search this Thread
      10-14-2015, 01:15 PM   #1
TrollToll
Banned
TrollToll's Avatar
444
Rep
1,153
Posts

Drives: 535i
Join Date: Sep 2015
Location: Texas

iTrader: (0)

Ways that turbos fail.

I am curious of all the ways our turbos can fail or give sufficient reason to replace. I know the seals can fail and cause smoking issues, particularly on startup. I also know the wastegates can either fail to close or can rattle (both of which are quite noisy, correct?) I've read of excessive shaft end play and of broken compressor/turbine wheels. What are the symptoms besides terrible noise and no boost? I ask all this because I am working on a 30FF code and someone claimed they had failed turbos with the same symptoms (slow to build, always 2-3 psi below target, regardless if target is 8 or 15) but I have a hard time believing my turbos would be bad yet making no abnormal whines, rattles, or smoking. Both wg actuators hold 20in vacuum indefinitely and the rod moves freely.
Appreciate 0
      10-14-2015, 02:28 PM   #2
mike@x-ph.com
BimmerPost Supporting Vendor
mike@x-ph.com's Avatar
United_States
4388
Rep
69,841
Posts


Drives: 2007 e92 335i / 2013 F30 328
Join Date: Sep 2013
Location: Las Vegas

iTrader: (16)

But never smoked .. I got 30ff code and heard the wastegate rattle
Appreciate 0
      10-14-2015, 06:03 PM   #3
Whathedunks
Second Lieutenant
13
Rep
228
Posts

Drives: 335i
Join Date: Sep 2009
Location: South

iTrader: (2)

Quote:
Originally Posted by mike@x-ph.com View Post
But never smoked .. I got 30ff code and heard the wastegate rattle
So you ended up replacing the turbos??
Appreciate 0
      10-14-2015, 06:04 PM   #4
mike@x-ph.com
BimmerPost Supporting Vendor
mike@x-ph.com's Avatar
United_States
4388
Rep
69,841
Posts


Drives: 2007 e92 335i / 2013 F30 328
Join Date: Sep 2013
Location: Las Vegas

iTrader: (16)

Quote:
Originally Posted by Whathedunks View Post
So you ended up replacing the turbos??
Yes .. only had couple hundred miles before warranty expires. I was not going to take that risk so i got them replaced free of charge
Appreciate 0
      10-14-2015, 06:15 PM   #5
TrollToll
Banned
TrollToll's Avatar
444
Rep
1,153
Posts

Drives: 535i
Join Date: Sep 2015
Location: Texas

iTrader: (0)

The wastegate rattle leads me to believe that the wastegates weren't fully closing in your case, which makes perfect sense.
Appreciate 0
      10-28-2015, 11:35 PM   #6
e92days
Banned
6
Rep
130
Posts

Drives: E92 335i
Join Date: Oct 2015
Location: Oklahoma

iTrader: (2)

Quote:
Originally Posted by Yournamehere90 View Post
I ask all this because I am working on a 30FF code and someone claimed they had failed turbos with the same symptoms (slow to build, always 2-3 psi below target, regardless if target is 8 or 15) but I have a hard time believing my turbos would be bad yet making no abnormal whines, rattles, or smoking. Both wg actuators hold 20in vacuum indefinitely and the rod moves freely.
I'm trying to figure out my 30ff also but I haven't started on any tests or replaced tubing yet. I was going to order the braided tubing from BMW but it $70 seemed like too much for a couple metres. ECStuning website is down and i'm still trying to figure out which lines to replace, how, and with what replacement tubing.
Appreciate 0
      10-29-2015, 06:44 AM   #7
TrollToll
Banned
TrollToll's Avatar
444
Rep
1,153
Posts

Drives: 535i
Join Date: Sep 2015
Location: Texas

iTrader: (0)

High Performance Silicone Vacuum Hose - 10 feet - .1375" ID (3.5mm) - Black https://www.amazon.com/dp/B009PYDR6G..._q2xmwbEC65K7W

It will be enough for all the passenger side lines plus the two behind the oil filter. It isn't really hard, just time consuming and restricted space.
Appreciate 0
      10-29-2015, 09:16 AM   #8
sk55
First Lieutenant
41
Rep
346
Posts

Drives: 2010 335xi coupe
Join Date: Mar 2015
Location: United States

iTrader: (0)

Quote:
Originally Posted by Yournamehere90 View Post
I am curious of all the ways our turbos can fail or give sufficient reason to replace. I know the seals can fail and cause smoking issues, particularly on startup. I also know the wastegates can either fail to close or can rattle (both of which are quite noisy, correct?) I've read of excessive shaft end play and of broken compressor/turbine wheels. What are the symptoms besides terrible noise and no boost? I ask all this because I am working on a 30FF code and someone claimed they had failed turbos with the same symptoms (slow to build, always 2-3 psi below target, regardless if target is 8 or 15) but I have a hard time believing my turbos would be bad yet making no abnormal whines, rattles, or smoking. Both wg actuators hold 20in vacuum indefinitely and the rod moves freely.
check for boost leaks...

might have a block cat... disconnect your downpipes... and give it a test run.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 11:04 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST