E90Post
 


GetBMWParts
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Shudder/rattle on 335 N55 6MT when revs drop to 500rpm



Reply
 
Thread Tools Search this Thread
      03-18-2013, 09:34 AM   #1
WULFFZA
Lieutenant
WULFFZA's Avatar
United_States
15
Rep
414
Posts

 
Drives: 2011 E90 335i M-Sport 6MT
Join Date: Apr 2010
Location: SoCal

iTrader: (0)

Shudder/rattle on 335 N55 6MT when revs drop to 500rpm

Does anyone else have this?

Occasionally when pulling away the revs will drop down to 500rpm for a moment before getting on the gas, or if I am in second in a parking lot idling along it will also drop to 500rpm, and there is a rattle from the engine bay, not a metallic clangy rattle, more like sound of knocking a wooden duster on a chalkboard

Thoughts? The car is so quiet at idle and engine so smooth that it amplifies any unusual sounds!
__________________
2011 E90 335i M-Sport 6MT Alpine white - saddle brown
2005 Toyota 4Runner 4WD Sport Edition Silver
Appreciate 0
      03-18-2013, 11:51 AM   #2
cctm4me
Private First Class
cctm4me's Avatar
4
Rep
142
Posts

 
Drives: 2015 F82
Join Date: Jan 2013
Location: Orlando

iTrader: (0)

I have dancing RPMS at stops in first gear I also have them bouncing a bit in slow second gear rolls. I also get hanging revs from time to time with clutch fully depressed.
Appreciate 0
      03-18-2013, 11:59 AM   #3
Meeni
Gateropode
Meeni's Avatar
24
Rep
1,876
Posts

 
Drives: BMW 330i 06
Join Date: Apr 2012
Location: TN

iTrader: (0)

The rpm should not drop below 600rpm at idle.

The sound you describe may be (almost) stalling. I understand you have a MT and the noise happens when you are rolling in 2nd at idle?
It is not considered normal to lug the car in 2nd at idle. Step it in first, give it a bit of gas to roll the same speed. It will not do that anymore.
Appreciate 0
      03-18-2013, 12:01 PM   #4
WULFFZA
Lieutenant
WULFFZA's Avatar
United_States
15
Rep
414
Posts

 
Drives: 2011 E90 335i M-Sport 6MT
Join Date: Apr 2010
Location: SoCal

iTrader: (0)

Quote:
Originally Posted by cct3me View Post
I have dancing RPMS at stops in first gear I also have them bouncing a bit in slow second gear rolls. I also get hanging revs from time to time with clutch fully depressed.
I don't have dancing revs, but do get that jerking in 2nd gear idling along, the shudder occurs when I cause the drop in revs, though I have noticed occasional revving up 200 rpm or so for no apparent reason with clutch in.

Seems "normal" then..
__________________
2011 E90 335i M-Sport 6MT Alpine white - saddle brown
2005 Toyota 4Runner 4WD Sport Edition Silver
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
Forum Jump


All times are GMT -5. The time now is 09:13 PM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, 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