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2010 2011 BMW 5 Series Forum F10 Engine valves tapping 550xi |
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03-01-2011, 10:10 PM | #3 |
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I concur, sounds like tapping, but I think it's the injectors can't hear it if you're in the car, but if you're outside it's quite audible.
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03-02-2011, 06:06 AM | #5 |
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Agreed, modern high-pressure injectors do sound a bit like excessive valve clearance in older engines, but it's quite normal so don't worry.
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03-02-2011, 10:12 AM | #6 |
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Anyone here think that their 535i sounds much like a modern diesel at idle and low revs? Between the injector clicking and kind of that muted growl, it kind of does to me.
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03-02-2011, 10:18 AM | #7 |
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Agreed. It's more pronounced when @ cold start, but like you said it's only at idle and low revs. And you have to be listening for it, or outside of the vehicle. Otherwise the engine and car in general is absolutely smooth and quiet. When you select sport mode the growl from the drivetrain is a very nice sound, like the car woke up. Not as visceral as a V8, but still really aurally pleasant.
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03-02-2011, 01:42 PM | #8 | |
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Quote:
For the sound of a real V8 please go here : |
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03-25-2011, 11:48 PM | #10 |
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+1. It does really sound like a diesel
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2011 F10 535i . Xirallic Sophisto Gray . Oyster . Black Dakota Leather. Delivered on 22 Dec 2010
2004 - E60 530i Olivin Green :: 1996 - E39 523i Titanium Silver :: 1992 - E36 318i Vulcangrau :: 1990 - E30 316i Alpine White |
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03-26-2011, 09:55 AM | #11 |
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I'll buy the explanation for the tapping sound coming from the injectors, but the second sound is more of a knocking and that's what I would say is creating that diesel like sound.
I want this rough knocking sound fixed and will continue to pursue with BMW and the dealer. Don't think it's normal nor should it be acceptable for a car in this class. It's actually embarassing to have a new car sound like an old diesel with 200K miles on it. |
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