F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > Sudden excessive idle engine noise on 335i M Sport
RW Carbon
Post Reply
 
Thread Tools Search this Thread
      01-05-2013, 06:13 PM   #1
NordicBob
Drives 2013 Black sapphire F30 M Sport sedan
 
NordicBob's Avatar
 
Drives: 2013 F30 335 M Sport sedan
Join Date: Nov 2012
Location: USA

Posts: 74
iTrader: (0)

Sudden excessive idle engine noise on 335i M Sport

Today our 1 month old 2013 F30 335i M-Sport Sedan with almost 1000 miles on it suddenly started making a rather loud engine noise "roar" when idling at stoplights during a short trip. According to the tach it was idling at normal RPM. Since the trip was short the engine hardly got a chance to warm up and the outside temp was about 45 F.

When I got the car home I popped open the hood to take a listen. It was a roaring sound somewhat reminiscent of the sound that a diesel truck makes when idling. I shut the engine off and then turned it back on. The roar was gone and our F30 sounded normal again.

Has anyone else experienced this with the F30 335i? Could the cause be something that triggered the engine cooling fan to run faster?

Thanks.

Bob
NordicBob is offline  
0
Reply With Quote
      01-05-2013, 06:16 PM   #2
TreDirtyFive
Captain
 
Drives: 335i Coupe
Join Date: Jun 2008
Location: Los Angeles, CA

Posts: 916
iTrader: (8)

I get all sorts of intermittent screeching sounds and groaning noises even with the car off, not to mention driving. I told my advisor and the tech said it's normal, which i think is pure BS.
__________________
335 F30 MSport: N55.Tech.NAV.+
135 DCT:N55.Prem.Sports.NAV.IPod
X-335 E92: Prem.Sports.NAV.IPod
Audi A3: Sports.Tech.NAV.sways.DP.K2 Coils.Flash.etc
X-67 Baracuda Fastback: DragGears.Sway.etc.
TreDirtyFive is offline   United_States
0
Reply With Quote
      01-05-2013, 07:38 PM   #3
BavarianFanatic
Too much is never enough
 
Drives: Too Many
Join Date: Mar 2008
Location: SE PA

Posts: 1,694
iTrader: (0)

It's your cooling fan. There have been a few posts about this recently. It sounds like there's a bad batch of thermostats causing the fan to run even though the oil temp hasn't reached the trip point. Have the dealer investigate the next time it's in for service.
BavarianFanatic is offline   United_States
0
Reply With Quote
      01-05-2013, 08:44 PM   #4
shivaswrath
Colonel
 
shivaswrath's Avatar
 
Drives: 2012 335i
Join Date: Apr 2008
Location: Lost in NJ

Posts: 2,956
iTrader: (3)

Quote:
Originally Posted by NordicBob View Post
Today our 1 month old 2013 F30 335i M-Sport Sedan with almost 1000 miles on it suddenly started making a rather loud engine noise "roar" when idling at stoplights during a short trip. According to the tach it was idling at normal RPM. Since the trip was short the engine hardly got a chance to warm up and the outside temp was about 45 F.

When I got the car home I popped open the hood to take a listen. It was a roaring sound somewhat reminiscent of the sound that a diesel truck makes when idling. I shut the engine off and then turned it back on. The roar was gone and our F30 sounded normal again.

Has anyone else experienced this with the F30 335i? Could the cause be something that triggered the engine cooling fan to run faster?

Thanks.

Bob
your thermostat is going to trip up your fan, and eventually the fan will die...take it to the dealer sooner rather than later, there are a number of people on here that are going through that.
__________________
2012 335i Mineral Gray
M Performance Whore: PPK|Exhaust|Brakes|Performance Suspension Struts & Springs|LSD|Black Kidney Grilles|CF Spoiler and Mirror Caps|Bav Stage 1|400Ms|BMWF30.com
shivaswrath is offline   United_States
0
Reply With Quote
      01-05-2013, 09:05 PM   #5
J1n
Lieutenant Colonel
 
Drives: F13 640 MSport+JB4
Join Date: Mar 2012
Location: Melbourne CBD

Posts: 1,520
iTrader: (0)

My engine sounds like theres a rave going on somewhere in there...Direct injection or....
J1n is offline  
0
Reply With Quote
      01-05-2013, 10:26 PM   #6
NordicBob
Drives 2013 Black sapphire F30 M Sport sedan
 
NordicBob's Avatar
 
Drives: 2013 F30 335 M Sport sedan
Join Date: Nov 2012
Location: USA

Posts: 74
iTrader: (0)

Thanks for the info on the thermostat/fan issue

Quote:
Originally Posted by BavarianFanatic View Post
It's your cooling fan. There have been a few posts about this recently. It sounds like there's a bad batch of thermostats causing the fan to run even though the oil temp hasn't reached the trip point. Have the dealer investigate the next time it's in for service.
Quote:
Originally Posted by shivaswrath View Post
your thermostat is going to trip up your fan, and eventually the fan will die...take it to the dealer sooner rather than later, there are a number of people on here that are going through that.
Thanks and appreciated for the info. I will bring our car to the dealer on Monday to ask them about it and request that they check the thermostat. Hopefully our dealer will have heard about this issue. I

I will look for other posts here about this problem. Do either of you know if the reported thermostat/fan issues have been intermittent at first and then become more frequent as the thermostat fails?
NordicBob is offline  
0
Reply With Quote
      01-06-2013, 11:27 AM   #7
Elk
Major
 
Drives: 2012 335i
Join Date: Apr 2012
Location: *

Posts: 1,274
iTrader: (0)

Quote:
Originally Posted by J1n View Post
My engine sounds like theres a rave going on somewhere in there...Direct injection or....
DI is responsible for the diesel-like ticking sound. Is this what you are referencing?
Elk is offline  
0
Reply With Quote
      01-06-2013, 09:28 PM   #8
J1n
Lieutenant Colonel
 
Drives: F13 640 MSport+JB4
Join Date: Mar 2012
Location: Melbourne CBD

Posts: 1,520
iTrader: (0)

Quote:
Originally Posted by Elk View Post
DI is responsible for the diesel-like ticking sound. Is this what you are referencing?
Ye knew that.. more like tick tick tick boom
J1n is offline  
0
Reply With Quote
Post 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 01:38 PM.




f30post
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