BMW 318d weird noise/vibration

mr_meah · 05-22-2017, 04:06 PM

Hi everyone,

im having a very strange issue with my car, it is a 2009 318d N47 engine.

the issue is that when i drive my car and come to a stop and leave it to idle for about the 5 minutes, the cars engine sounds "deeper" and can feel a slight vibration through steering wheel and pedals. this only happens exactly a few minutes after coming to a stop and leaving the car idle.

the car is running the way it should and everything sounds mechanically fine but its just that deep/vibration noise that is annoying me lol

car has covered 125k miles and has been serviced 1000 miles ago, i did check if the engine covers and airbox were secured and everything checked out!

any advice much appreciated! thanks

juld0zer · 05-23-2017, 10:52 AM

EGR?

mr_meah · 05-24-2017, 08:10 AM

EGR was replaced a year ago but could that cause engine noise to get "deeper" even if it's at the same rpm?

juld0zer · 05-24-2017, 11:18 AM

On some cars yes.

Check also the bolts for the DPF. The lower ones holding it to the bracket can come loose and cause a huge vibration. Not sure about the 5mins part though. Is the AC on when you experience the issue?

bishbosh · 05-24-2017, 03:41 PM

It's funny you mention the noise comes after 5 minutes of idling because that is the same amount of time (of idling) when the egr valve will close. Whether it relates to the egr or not I don't know.

The egr valve on the n47 engine is quite reliable and doesn't foul up compared to it's older brother.

05-22-2017, 04:06 PM	#1
mr_meah New Member 0 Rep 11 Posts Drives: BMW 318d E90 LCI Join Date: Oct 2016 Location: London iTrader: (0)	BMW 318d weird noise/vibration Hi everyone, im having a very strange issue with my car, it is a 2009 318d N47 engine. the issue is that when i drive my car and come to a stop and leave it to idle for about the 5 minutes, the cars engine sounds "deeper" and can feel a slight vibration through steering wheel and pedals. this only happens exactly a few minutes after coming to a stop and leaving the car idle. the car is running the way it should and everything sounds mechanically fine but its just that deep/vibration noise that is annoying me lol car has covered 125k miles and has been serviced 1000 miles ago, i did check if the engine covers and airbox were secured and everything checked out! any advice much appreciated! thanks
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05-23-2017, 10:52 AM	#2
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	EGR?
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05-24-2017, 08:10 AM	#3
mr_meah New Member 0 Rep 11 Posts Drives: BMW 318d E90 LCI Join Date: Oct 2016 Location: London iTrader: (0)	EGR was replaced a year ago but could that cause engine noise to get "deeper" even if it's at the same rpm?
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05-24-2017, 11:18 AM	#4
juld0zer Lieutenant Colonel 480 Rep 1,600 Posts Drives: Prev 135i 7DCT, Now 130i 6sp Join Date: Jul 2016 Location: 2153 iTrader: (0)	On some cars yes. Check also the bolts for the DPF. The lower ones holding it to the bracket can come loose and cause a huge vibration. Not sure about the 5mins part though. Is the AC on when you experience the issue?
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05-24-2017, 03:41 PM	#5
bishbosh Lieutenant Colonel 840 Rep 1,993 Posts Drives: F30 335d Join Date: Oct 2013 Location: Sheffield iTrader: (1) Garage List 2014 BMW 335d [0.00]	It's funny you mention the noise comes after 5 minutes of idling because that is the same amount of time (of idling) when the egr valve will close. Whether it relates to the egr or not I don't know. The egr valve on the n47 engine is quite reliable and doesn't foul up compared to it's older brother.
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