E90Post
 


 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Slight grinding noise from 2011 320d



Reply
 
Thread Tools Search this Thread
      10-19-2013, 05:20 PM   #1
CTR_Paul
New Member
 
Drives: 320d Sport Plus
Join Date: Oct 2013
Location: Cheshire, UK

Posts: 5
iTrader: (0)

Question Slight grinding noise from 2011 320d

Hi, I'm hoping you gents will be able to point me in the right direction regarding a fault that's recently developed on my 2011 320d Sport Plus (19k). Normally its driven withe lots of sympathy as its not a company/lease car to that end the tyres are good for at least 10k more.

The issue is that the car makes a slight grinding sound. Think mortar and pestel and you're about there. The noise occurs at lower speeds (10>35mph) when their is less road noise. Its impossible to hear the noise when the windows are down, and its really tricky to ok pinpoint where it comes from, but having sat in the back I think it sounds fairly central rather than on a specific wheel.

With the above in mind I was thinking diff perhaps? The noise occurs with the car in or out of gear, clutch in and out. From what I can tell it doesn't sound like its related to road speed, but when you drop below 5mph the noise disappears. Likewise it's not present on idle or when reving the car gently. Thus I'm thinking drive train.

I've tried listening for it when turning left and right and that doesn't seem to alter things, which makes me think a wheel bearing is unlikely to be the noisy part here. I'm also pretty sure its not the N47s infamous time chain either given it sounds absolutely normal on idle.

Its due in at BMW later this week, I'm just a little concerned they'll miss the noise as it's tricky to pick up on anything but super smooth roads.

Has anyone had anything similar ?
CTR_Paul is offline  
0
Reply With Quote
      10-19-2013, 05:23 PM   #2
CTR_Paul
New Member
 
Drives: 320d Sport Plus
Join Date: Oct 2013
Location: Cheshire, UK

Posts: 5
iTrader: (0)

Forgot to add, lightly applying the brakes or hand brake also make no difference to the pitch and frequency of the noise. The noise also doesn't normally appear until about 3/4 mins of driving, suggesting something has to warm up for it occur.
CTR_Paul is offline  
0
Reply With Quote
      10-20-2013, 03:37 AM   #3
bmwak
Major
 
bmwak's Avatar
 
Drives: 325D M-Sport Coupe (E92 LCI)
Join Date: Sep 2008
Location: London

Posts: 1,039
iTrader: (3)

I've had the timing chain issue in my now sold 2009 320d. It only did 18k miles and needed the timing chain guides, timing chains and various other things replaced. It was a engine out job and labour intense (thankfully I had new car warranty). This was replaced and the noise went, however due to the change of design, the engine became quite a bit louder. I knew the technician working on it so workmanship wasn't an issue. Not many people have had the very latest 2013 timing chains and guides, which cured the noise for good but I did.

The timing chain noise is not necessarily on idle. When stationary gently rev the car upto 1,500 / 2,000 rpm. Is there any signs of a slight scraping/grinding noise from the passenger footwell area? It was on mine but only slightly. It was more noticable when travelling in 1, 2 or 3rd gears and only upto speeds of 30mph-ish - is that similar to what you have?


BMW have re-designed the chains and guides several times between 2009 and 2013. In the end I decided I couldn't stand the louder engine (it wasn't bad but it bugged me) and I basically got BMW to buy the car back off me.

Hope this helps you.
bmwak is offline   United Kingdom
0
Reply With Quote
      10-20-2013, 03:41 AM   #4
bmwak
Major
 
bmwak's Avatar
 
Drives: 325D M-Sport Coupe (E92 LCI)
Join Date: Sep 2008
Location: London

Posts: 1,039
iTrader: (3)

Quote:
Originally Posted by CTR_Paul View Post
Its due in at BMW later this week, I'm just a little concerned they'll miss the noise as it's tricky to pick up on anything but super smooth roads.
Depends on the competency of your dealer but if they test it on the ramp it will be atleast 5 times louder than on the road, so very obvious.
bmwak is offline   United Kingdom
0
Reply With Quote
      10-20-2013, 10:33 AM   #5
CTR_Paul
New Member
 
Drives: 320d Sport Plus
Join Date: Oct 2013
Location: Cheshire, UK

Posts: 5
iTrader: (0)

Thanks for your reply bmwak. I checked today and I can't really hear any scraping noise when the car is stationary. I've tried listening by the front offside wheel and nothing too unusual there either. The only noises I can hear are more like ticking and belt noise rather than scraping or grinding so I hope its not that. It doesn't sound like the videos of the timing chain issues that I've watched on YouTube.

The noise sounds like its coming more from the centre of the car really, like its under the centre console perhaps. I also noticed today the exhaust seems to vibrate a reasonable amount (and sort of makes a ticking noise when warm like its just slightly catching a heat shield), not sure if it did previously. That could be a red herring though.

Having washed it over the weekend if it was brake related I'd have expected lots of scraping noises initially due to brake rust, but that's not the case. The acid test to confirm if its engine or drive train would be to turn the engine off whilst moving, but I'm not sure that's possible?
CTR_Paul is offline  
0
Reply With Quote
      10-21-2013, 11:27 AM   #6
CTR_Paul
New Member
 
Drives: 320d Sport Plus
Join Date: Oct 2013
Location: Cheshire, UK

Posts: 5
iTrader: (0)

Update: Noise still present when rolling and the engine is switched off (hold the start stop button for a couple of seconds to turn off and make sure you press the throttle when restarting).

The problem therefore is not engine related. Be it diff, wheel bearing or even a sticky caliper it's not going away. At least I feel confident I'll not have a timing chain failure now. *phew*
CTR_Paul is offline  
0
Reply With Quote
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 07:49 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