Noisy engine at start normal?

retiredmarine · 07-30-2014, 11:14 AM

This is my first BMW, but it seems that when you first start a cold engine, it idles kinda loud.....like rough. It seems to smooth out after awhile. Never had a turbo before, but did anyone else notice that this engine is kinda noisy at start up??

320FAMILY · 07-30-2014, 11:23 AM

It is normal. It sounds a bit like a diesel because of the direct injection design. Definitely not as refined as the inline six of years past.

cwazy1 · 07-30-2014, 11:31 AM

In general cold starts are loud.

When I first showed my folks my new car, they thought something was wrong...

They drive a merc

retiredmarine · 07-30-2014, 11:34 AM

Oh ok thank you...that's a relief...glad it just wasn't something with my car!

BeachsideF30 · 07-30-2014, 12:11 PM

My friends call my car the sewing machine

mike@x-ph.com · 07-31-2014, 11:48 AM

Quote:

Originally Posted by BeachsideF30

My friends call my car the sewing machine

LOL

Tommy_hf · 07-31-2014, 12:19 PM

cold start ppl might think your car is broken with the recirculating metallic rattle of the waste gate the first half a minute or so, sounds a bit clattery diesel like as well

Dippydo · 07-31-2014, 01:22 PM

Quote:

Originally Posted by Tommy_hf

cold start ppl might think your car is broken with the recirculating metallic rattle of the waste gate the first half a minute or so, sounds a bit clattery diesel like as well

Valet guys ask me all the time if it is a diesel. LOL...I just say yes...

GL888 · 07-31-2014, 09:27 PM

Quote:

Originally Posted by BeachsideF30

My friends call my car the sewing machine

People genuinely think it is a diesel.

Tiago@VRSF · 07-31-2014, 10:03 PM

It does sound a lot like a diesel. Definitely quiets down when warm though

MickAv8r · 07-31-2014, 11:55 PM

two things are happening.

One - when the car first starts the exhaust is wide open to dump as much heat into the cats as possible to get them up to operating temp. Its a scheme to reduce emissions.

Two - DI engines have this diesel sound because its the same thing causing it - high pressure fuel injectors. A multi-port fuel injector operates around 120 psi. A GDI injector is running around 2200 psi. Its also much more prevalent at idle than in other areas of the powerband.

It isnt a lack of refinement that causes the noise.

Ali Shiralian · 08-01-2014, 07:11 AM

Should've bought a 335, sweet sound on start up. This alone made me choose 335 over 328. Can't stand the four banger sound no offence

retiredmarine · 08-01-2014, 08:47 AM

thanks for the input...definitely put my mind at ease.

munch520 · 08-02-2014, 11:52 PM

Quote:

Originally Posted by Ali Shiralian

Should've bought a 335, sweet sound on start up. This alone made me choose 335 over 328. Can't stand the four banger sound no offence

My wife's Acadia sounds good idling cold too. Lol doesn't meant I wanna drive it.

KGB_123_99 · 08-04-2014, 09:41 AM

Quote:

Originally Posted by Tommy_hf

cold start ppl might think your car is broken with the recirculating metallic rattle of the waste gate the first half a minute or so, sounds a bit clattery diesel like as well

So is that wastegate rattle normal on a cold start? Mine is pretty loud inside the garage on a cold start and lasts for a minute or so. I learned to live with it but I was never quite sure if it is normal or not.

TomDenmark · 08-04-2014, 10:01 AM

Have never noticed any noise at cold start.
Now I'm worried if something is wrong with my ears.

KGB_123_99 · 08-04-2014, 02:38 PM

Quote:

Originally Posted by TomDenmark

Have never noticed any noise at cold start.
Now I'm worried if something is wrong with my ears.

My car makes a myriad of noises

, I think the 2014s are a little better in the noise department.

07-30-2014, 11:14 AM	#1
retiredmarine Second Lieutenant 49 Rep 274 Posts Drives: 2014 328i msport Join Date: Jul 2014 Location: Corpus Christi iTrader: (0)	Noisy engine at start normal? This is my first BMW, but it seems that when you first start a cold engine, it idles kinda loud.....like rough. It seems to smooth out after awhile. Never had a turbo before, but did anyone else notice that this engine is kinda noisy at start up??
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07-30-2014, 11:23 AM	#2
320FAMILY Private 3 Rep 56 Posts Drives: 2013 320i and 2014 320i Join Date: Jul 2014 Location: McKinney, TX iTrader: (0)	It is normal. It sounds a bit like a diesel because of the direct injection design. Definitely not as refined as the inline six of years past. __________________ 2014 320i (his)- Glacier silver, sport pkg, 6 spd, moon, heated seats, spoiler, black kidney grilles, M footrest, BMS stage 1 +3.5 psi 2013 320i (hers)- Arctic white, 8 spd, moon, heated seats
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07-30-2014, 11:31 AM	#3
cwazy1 Second Lieutenant 46 Rep 211 Posts Drives: MG F80 ZCP Join Date: May 2014 Location: Seattle, WA iTrader: (0)	In general cold starts are loud. When I first showed my folks my new car, they thought something was wrong... They drive a merc
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07-30-2014, 11:34 AM	#4
retiredmarine Second Lieutenant 49 Rep 274 Posts Drives: 2014 328i msport Join Date: Jul 2014 Location: Corpus Christi iTrader: (0)	Oh ok thank you...that's a relief...glad it just wasn't something with my car!
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07-30-2014, 12:11 PM	#5
BeachsideF30 Lieutenant 129 Rep 599 Posts Drives: E90--> E92-->F30 Join Date: Jun 2012 Location: FL iTrader: (0)	My friends call my car the sewing machine
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07-31-2014, 12:19 PM	#7
Tommy_hf First Lieutenant 70 Rep 327 Posts Drives: F36 CQ M, Z4 E85 3.0iS MSL SC Join Date: Dec 2011 Location: Netherlands iTrader: (0)	cold start ppl might think your car is broken with the recirculating metallic rattle of the waste gate the first half a minute or so, sounds a bit clattery diesel like as well
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07-31-2014, 10:03 PM	#10
Tiago@VRSF 2095 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	It does sound a lot like a diesel. Definitely quiets down when warm though
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07-31-2014, 11:55 PM	#11
MickAv8r Captain 175 Rep 766 Posts Drives: 2014 EBII 328ix Join Date: Mar 2014 Location: New Hampster iTrader: (0)	two things are happening. One - when the car first starts the exhaust is wide open to dump as much heat into the cats as possible to get them up to operating temp. Its a scheme to reduce emissions. Two - DI engines have this diesel sound because its the same thing causing it - high pressure fuel injectors. A multi-port fuel injector operates around 120 psi. A GDI injector is running around 2200 psi. Its also much more prevalent at idle than in other areas of the powerband. It isnt a lack of refinement that causes the noise. __________________ Well weathered leather, hot metal and oil, the scented country air. Sunlight on chrome, the blur of the landscape, every nerve aware! 2014 328ix EBII - Sport AT, Light Pkg, Blk Dakota, Moonroof, Navigation, Heated Seats, HK Audio, Driver Assist, Sport Pedals, Dinan Springs, Bilstein B8s, M-Performance BBK
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08-01-2014, 07:11 AM	#12
Ali Shiralian Lieutenant Colonel 813 Rep 1,986 Posts Drives: 2014 335i xdrive, 2014 X5 3.5d Join Date: Mar 2014 Location: Owen sound, Ontario, canada iTrader: (0) Garage List 2017 Lexus RX 350 F ... [0.00] 2017 Jaguar F Type ... [0.00] 1990 Miata [9.00] 2014 X5 [9.00]	Should've bought a 335, sweet sound on start up. This alone made me choose 335 over 328. Can't stand the four banger sound no offence
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08-01-2014, 08:47 AM	#13
retiredmarine Second Lieutenant 49 Rep 274 Posts Drives: 2014 328i msport Join Date: Jul 2014 Location: Corpus Christi iTrader: (0)	thanks for the input...definitely put my mind at ease.
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08-04-2014, 10:01 AM	#16
TomDenmark Second Lieutenant 61 Rep 205 Posts Drives: 14' 320i ActiveFlex Join Date: Dec 2013 Location: Brazil, SP - Valinhos iTrader: (0)	Have never noticed any noise at cold start. Now I'm worried if something is wrong with my ears.
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