European Auto Source
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > idle engine noise please help!

Thread Tools Search this Thread
      06-29-2012, 01:03 PM   #1
Enlisted Member

Drives: 325i Msport
Join Date: May 2012
Location: United Kingdom

Posts: 36
iTrader: (0)

idle engine noise please help!

hi guys, iv'e had a problem that's been racking my head for the last few days...
I have a 2006 e90 325i saloon and on idle it sounds like the engine is getting louder and louder in terms of roughness..
when i bought the car it ran smooth on idle and sounded new but 3 months down the line now it's starting to sound rough.
Iv;e thought about many things and googled alot but really haven't got an answer.
it almost sounds like you can hear the engine going round as if the bearings wern't lubricated properly if ya get what i mean..
The only thing i can think of is that I topped up a litre of oil a few weeks back, I used carlube triple R 5/30 which euro car parts recommended..
would this be enough to make the roughness? would I now need to get a full oil change?
any help is most appreciated, thanks!
Appreciate 0
      06-30-2012, 08:41 AM   #2
Class Leading Reprobate

B005T3D-G's Avatar
Drives: Impreza STi - E92 335i (56)
Join Date: Oct 2011
Location: Mintlaw, Scotland

Posts: 421
iTrader: (0)

Garage List
Can't help you on the physical problem though have you considered that your becoming more sensitive to it. What did you drive before. After my Subaru I always thought the 335i was very smooth on idle but now I'm used to it the direct injection now sounds like machine gun fire.

As for the oil I would always recommend topping up with the same oil or if that's unknown to do a full change. Additives from one brand can react badly with additives from another. Can't say I have experience with this as far as the automotive side goes but working with hydraulic systems I learned that lesson the hard way so may be the same as far as engine oil goes.

Good luck anyway, hope it's something simple.
E92 335i | 6 Speed manual | BMS 4xLED Halo Bulbs | JB4 (waiting to be installed) | BMW Performance Gloss Black Grills | BMW Performance Exhaust | Smoked side Repeaters
Aero Front Lip | M3 Lip Spoiler |19" Cades Tyrus 'Gunmetal' with polished lips | Falken FK452 Rubber
........... More to come
Appreciate 0
      06-30-2012, 12:44 PM   #3
Major General
United Kingdom

makkan00's Avatar
Drives: E91 330D
Join Date: Dec 2011
Location: Essex

Posts: 7,409
iTrader: (48)

Is your oil level appropriate?
Why you had to top up?
Mileages of your car?
Can it be engine chain?
Carlube isn't great for beamers.
I will start with full engine oil change and use recommended oil to start with.
Appreciate 0
      07-02-2012, 06:44 AM   #4
Enlisted Member

Drives: 325i Msport
Join Date: May 2012
Location: United Kingdom

Posts: 36
iTrader: (0)

hi guys thanks for the comments..

I changed the oil all together and it's alot better!

problem solved
Appreciate 0
      07-02-2012, 07:56 AM   #5
Second Lieutenant

Drives: e91 325i
Join Date: Nov 2011
Location: exeter

Posts: 255
iTrader: (0)

these really do respond well to an oil change using good oil
Appreciate 0


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 06:23 PM.

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