E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > N55 bottom end tick, Yet Oil analysis perfect.



Reply
 
Thread Tools Search this Thread
      07-11-2018, 02:11 AM   #1
Jwallace410
New Member
Jwallace410's Avatar
5
Rep
13
Posts

Drives: 2011 BMW 335i e93
Join Date: Nov 2017
Location: JoCo, NC

iTrader: (0)

N55 bottom end tick, Yet Oil analysis perfect.

My 2011 335i N55 has had a very slight and intermittent knock/tapping noise which can be heard at idle only. Pushing hard or with high rpm, no issues. I recorded a video where i taped under the car and the noise was much more pronounced [bottom end, driver side area]. Besides occasional surging idle, and the noise specifically, no real issues. I have it in my head that if it goes, it goes and just replace it through my aftermarket warranty, hopefully. But im curious by nature so any ideas?

The vehicle has 79,000 miles right now and i bought it with 63k. The noise became much louder right after oil change with fresh oil, then slowly leveled to the occasional idle knocking.
It does not sound like injector noise, nor is the sound coming from that area. I also sent oil to Blackstone Labs, adking about the problem specifically and they said there is no metal shavings.

Attached Images
File Type: pdf 11 BMW 335I-180429.pdf (17.4 KB, 9 views)
__________________
U.S. Army (Ret.) OIF/OEF W.I.A.
(They tried, but I'm too Stubborn to die like that)
Appreciate 0
      07-20-2018, 01:54 AM   #2
FireBlaze
Private
23
Rep
92
Posts

Drives: 2013 E92 335i 6MT M-Sport
Join Date: Mar 2016
Location: Torrance, CA

iTrader: (0)

Quote:
Originally Posted by Jwallace410 View Post
My 2011 335i N55 has had a very slight and intermittent knock/tapping noise which can be heard at idle only. Pushing hard or with high rpm, no issues. I recorded a video where i taped under the car and the noise was much more pronounced [bottom end, driver side area]. Besides occasional surging idle, and the noise specifically, no real issues. I have it in my head that if it goes, it goes and just replace it through my aftermarket warranty, hopefully. But im curious by nature so any ideas?

The vehicle has 79,000 miles right now and i bought it with 63k. The noise became much louder right after oil change with fresh oil, then slowly leveled to the occasional idle knocking.
It does not sound like injector noise, nor is the sound coming from that area. I also sent oil to Blackstone Labs, adking about the problem specifically and they said there is no metal shavings.

My 2012 N55 with 80k miles make the same noise. No idea what it can be. My oil analysis also came back very clean. Hoping it's not a rod bearing.
__________________
VRSF DP, VRSF 7" Intercooler, BMS OCC, Stg 2 LPFP, Custom MHD E30 Tune, Late Model E-Series N55
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 03:33 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, 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