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      11-19-2014, 12:24 PM   #1
RarScaryFrosty
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Engine sound from cold start during winter

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Hey guys, I have a 2013 328i I recently bought. I live in an areas where there are no garages, so I am forced to park outside year-round. This isn't an issue for me since I've been doing it my whole life.

Is it normal for the car to sound sluggish from an extreme cold start? I can hear a "knocking" sound when idling at start up and driving at low RPM's. Once the car warms up more after a mile or so at 40-50MPH, it sounds totally fine at idle and low RPM's.

I was given 2014 loaner 335i today and it made no unusual sounds. I guess I can't compare a 6 cylinder to a turbo 4 though. I just want the peace of mind that it's normal for the car to sound "off" when truly cold. This is my first ever turbo'd car I've owned.
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      11-19-2014, 12:48 PM   #2
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I think that it is normal, just oil taking a little longer to reash up in the heads. Also, the 4 cyl. from BMW is really loud. So I don't think that you have anything to worry. Still have it checked out and see. The 335 is a lot quiter than the 328. I have a 335 and it does not make any sound compared to a 328. Hope that this makes you feel a little better.

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      11-19-2014, 02:28 PM   #3
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Its the high pressure direct injection that is making that sound.
The 4 isnt as balanced as the 6, hence the "diesel" sound
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      11-19-2014, 03:06 PM   #4
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And also at first start catalytic convertor is offline engine works funny till it heats up, works like that because of the emission regulations
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      11-19-2014, 03:49 PM   #5
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Ah ok, thanks guys! This all makes sense to me. I'm not too concerned about the noise since it goes away after a mile or two of consistent driving to warm up the motor. I typically let the RPM's settle to 1,000 or lower for around 30 seconds, then put the car into drive.

I actually like the sound of the 328i better (once warmed up haha), but the 335 does seem a bit quicker off the line, even when cold.
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      11-19-2014, 04:53 PM   #6
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Quote:
Originally Posted by RarScaryFrosty View Post
Ah ok, thanks guys! This all makes sense to me. I'm not too concerned about the noise since it goes away after a mile or two of consistent driving to warm up the motor. I typically let the RPM's settle to 1,000 or lower for around 30 seconds, then put the car into drive.

I actually like the sound of the 328i better (once warmed up haha), but the 335 does seem a bit quicker off the line, even when cold.
Better?
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      11-19-2014, 06:43 PM   #7
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Quote:
Originally Posted by ELNch
Its the high pressure direct injection that is making that sound.
The 4 isnt as balanced as the 6, hence the "diesel" sound
As someone who has a 6 cylinder diesel I find it odd when people keep saying the 4 cylinder sounds like a diesel in a sort of "negative" way. I have nothing against the sound of the 6 cylinder diesel, could it be better, yes without a doubt but let's just agree that the 4 banger sounds like the 4 banger. The diesels sound like the diesels
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      11-20-2014, 12:19 AM   #8
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My 428GC sounds a bit rough on cold mornings too. Once warmed up, its sounds better. It's a BMW 4 cylinder thing.
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