[josueboca]

Hi everyone , am here seeking help from you guys about my car engine making this rattling noise , I can tell that the noise is coming from the Vanos area were it gets really loud , Car is a 2011 328i n52
please watch the video and let me know what you think thank you all in advance.

[ctuna]

Have you had a accessory belt fail lately?
The belts get wrapped around the main crank and sucked
into the engine where the pieces get sucked up into
the timing chain.

[marvinstockman]

This will help you localize the noise source:

https://www.amazon.com/ABN-Mechanics...s%2C140&sr=8-5

[nhhiep]

Check the ac compressor pulley. I had the same noise. I just put in a shorter belt to bypass it. Shop wants $500 labor to replace the compressor

Stop driving the car asap, if the belt breaks, so is your wallet

[josueboca]

Originally Posted by ctuna

Have you had a accessory belt fail lately?
The belts get wrapped around the main crank and sucked
into the engine where the pieces get sucked up into
the timing chain.

I have own the car since it was 15k miles and the belt has never failed

[josueboca]

Originally Posted by marvinstockman

This will help you localize the noise source:

https://www.amazon.com/ABN-Mechanics...s%2C140&sr=8-5

I have one of those and was able to hear the noise more and more close to the vanos area

[josueboca]

Originally Posted by nhhiep

Check the ac compressor pulley. I had the same noise. I just put in a shorter belt to bypass it. Shop wants $500 labor to replace the compressor

Stop driving the car asap, if the belt breaks, so is your wallet

Which belt did you replaced with ? The noise is coming from vanos and it migth also be coming from the compressor area too , i will check thanks for the info ...

[spiderspider]

the bolts that secure the VANOS gears break off and start rattling around. BMW extended the warranty on this sort of failure to 10 years. this just happened to my N51 and had it repaired under warranty.

Service bulletin:

https://static.nhtsa.gov/odi/tsbs/20...45283-5967.pdf

[nhhiep]

Originally Posted by josueboca

Which belt did you replaced with ? The noise is coming from vanos and it migth also be coming from the compressor area too , i will check thanks for the info ...

I used this belt, but any 431K6 would fit. Good for a few months now. wonder what is it like without AC in winter to defrose the windshield

Duralast Serpentine Belt 431K6

[josueboca]

Originally Posted by nhhiep

I used this belt, but any 431K6 would fit. Good for a few months now. wonder what is it like without AC in winter to defrose the windshield

Duralast Serpentine Belt 431K6

THank you will deff give it a try and see what happens

[josueboca]

Originally Posted by spiderspider

the bolts that secure the VANOS gears break off and start rattling around. BMW extended the warranty on this sort of failure to 10 years. this just happened to my N51 and had it repaired under warranty.

Service bulletin:

https://static.nhtsa.gov/odi/tsbs/20...45283-5967.pdf

I called the dealer and they ask for the last 7 of my vin number and that service bulletin did not came up , I insisted and they are looking into it will keep you guys updated on what follows

[spiderspider]

Originally Posted by josueboca

I called the dealer and they ask for the last 7 of my vin number and that service bulletin did not came up , I insisted and they are looking into it will keep you guys updated on what follows

Yeah it took a bit of prodding with the service rep.

they have to pull off the valve cover to diagnose it (this was a bit of an issue with me because i do not use the dealer for service and do not trust these guys), so the valve cover gasket should be replaced. they have to retrieve the broken bolts, which probably means dropping the oil pan, so that's a new oil pan gasket as well.

[colorado.e9x]

Mines been rattling too on top of the lifter tick. If anyone can verify the solution (s) mentioned above, that would be great. My belt is only a year old though.

[spiderspider]

Any update on this?

[badapl]

Sounds exactly like mine. I was told it’s the cam followers ??

[Mike K]

Check this thread:

https://www.e90post.com/forums/showt...ight=whistling

[gbalthrop]

Originally Posted by badapl

Sounds exactly like mine. I was told it’s the cam followers ??

Be aware that 2010 & 2011 328i/xi (EXCEPT for E91??? :-) are subject to NHTSA Recall Campaign 14V-176 for broken VANOS Bolts, as described in attached RCRIT pdf.

An Endoscope, available from Amazon for $20, connected to Laptop or Phone via USB/A or USB/C port will allow you to inspect the VANOS bolts, at least on the INTAKE Cam Sprocket, WITHOUT removal of the Valve Cover.
https://www.amazon.com/Seesi-Endosco...s%2C828&sr=8-3
George