N52: “Marble noise” what is it.+sound recording

E91 Hoarder · 04-17-2024, 11:20 AM

Get sort of metallic marble noise when accelerating. Noise comes from the engine. No particular codes. Not sure where to start investigating from top or from the bottom?

Listen to the sound recording below. It is most pronounced after 10th second.

https://1drv.ms/u/s!ApHwYtqe7EQWnRuyWMeMnUpqPhn9

What do you think?

Mike K · 04-17-2024, 09:25 PM

Check the BMW recall site. It may be broken faulty Vanos bolts. If it is, park it.

M-technik-3 · 04-18-2024, 04:08 AM

Back when E30 were everywhere and swapping a M/S5x was the common if the it sounded like marbles rattling in the engine it was time for a Biesen Seal kit for the single Vanos.

Mike's suggestion is spot on and if possible scope it to see if they are.

E91 Hoarder · 04-18-2024, 10:55 AM

Quote:

Originally Posted by Mike K

Check the BMW recall site. It may be broken faulty Vanos bolts. If it is, park it.

Quote:

Originally Posted by M-technik-3

Back when E30 were everywhere and swapping a M/S5x was the common if the it sounded like marbles rattling in the engine it was time for a Biesen Seal kit for the single Vanos.

Mike's suggestion is spot on and if possible scope it to see if they are.

Thanks guys. Mine is 2006 330i, and the vanos bolt recall does not apply to my car.

Any idea if these earlier motors also have the weak aluminum bolts that are getting replaced in 2010-2013 cars?

E91 Hoarder · 04-20-2024, 02:23 PM

Opened up the valve cover, but not seeing any loose bolts. Any other ideas?

Noticed the plastic chain guide has some play, but seems like it is by design.

autoart · 04-20-2024, 10:04 PM

Could it be something is rolling around on the splash tray?

04-17-2024, 11:20 AM	#1
E91 Hoarder Captain 123 Rep 852 Posts Drives: E91 AWD, E91 RWD, E90, X535i Join Date: Oct 2011 Location: On the Road iTrader: (8)	N52: “Marble noise” what is it.+sound recording Get sort of metallic marble noise when accelerating. Noise comes from the engine. No particular codes. Not sure where to start investigating from top or from the bottom? Listen to the sound recording below. It is most pronounced after 10th second. https://1drv.ms/u/s!ApHwYtqe7EQWnRuyWMeMnUpqPhn9 What do you think? __________________ "Let me see what I can do... sir"
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04-17-2024, 09:25 PM	#2
Mike K First Lieutenant 322 Rep 393 Posts Drives: 2011 e91 328i RWD Join Date: Jan 2021 Location: Chicago Area iTrader: (0) Garage List 2011 BMW 328i e91 [0.00]	Check the BMW recall site. It may be broken faulty Vanos bolts. If it is, park it.
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04-18-2024, 04:08 AM	#3
M-technik-3 Major 2100 Rep 1,483 Posts Drives: E30 M3, E36 M3, 328iT, 335i Join Date: Mar 2020 Location: western Ma iTrader: (0) Garage List 1995 M3 [9.00] 2007 E91 [7.25] 1988 M3 [9.50]	Back when E30 were everywhere and swapping a M/S5x was the common if the it sounded like marbles rattling in the engine it was time for a Biesen Seal kit for the single Vanos. Mike's suggestion is spot on and if possible scope it to see if they are.
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04-20-2024, 02:23 PM	#5
E91 Hoarder Captain 123 Rep 852 Posts Drives: E91 AWD, E91 RWD, E90, X535i Join Date: Oct 2011 Location: On the Road iTrader: (8)	Opened up the valve cover, but not seeing any loose bolts. Any other ideas? Noticed the plastic chain guide has some play, but seems like it is by design. Attached Images __________________ "Let me see what I can do... sir"
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04-20-2024, 10:04 PM	#6
autoart Colonel 347 Rep 2,281 Posts Drives: 2009 335i e90 M/ 22 X3 Join Date: Oct 2010 Location: socal iTrader: (8)	Could it be something is rolling around on the splash tray?
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