Noise after turning the car off

Matt09i · 08-17-2017, 07:28 AM

Hey guys,

Last night when I got home and turned off my car (09 335i xdrive), it started making 2 loud noises. Similar to this video:

Any idea what this noise is?

Phil325i · 08-17-2017, 07:56 AM

Have to say the idle speed in the vid sounds fast.

One of the sounds is probably the pressure relief valve. Most engines these days have a valve to release pressure in the crankcase/breather system on switch-off. Mine makes a kind of 'pfffstt' noise after the engine stops, when I switch off.

Matt09i · 08-17-2017, 06:34 PM

....

MakkkD · 10-19-2017, 03:35 PM

did you resolve this issue? I was thinking tensioner belt since mine just busted last weekend. I'm at 106k BTW

BashShah · 10-21-2017, 01:17 AM

Quote:

Originally Posted by MakkkD

did you resolve this issue? I was thinking tensioner belt since mine just busted last weekend. I'm at 106k BTW

Just curious, did you see oil on the floor of Belly Pan when you changed your Belt?
do you know what I am getting at?

MakkkD · 10-21-2017, 06:51 AM

Quote:

Originally Posted by DarkNemesis

Quote:

Originally Posted by MakkkD

did you resolve this issue? I was thinking tensioner belt since mine just busted last weekend. I'm at 106k BTW

Just curious, did you see oil on the floor of Belly Pan when you changed your Belt?
do you know what I am getting at?

Quote:

Originally Posted by DarkNemesis

Quote:

Originally Posted by MakkkD

did you resolve this issue? I was thinking tensioner belt since mine just busted last weekend. I'm at 106k BTW

Just curious, did you see oil on the floor of Belly Pan when you changed your Belt?
do you know what I am getting at?

No sir

BashShah · 10-22-2017, 04:00 AM

Quote:

Originally Posted by MakkkD

No sir

ok, if you did not see any oil, on the belly pan or floor.
exactly when the belt shredded.
then you may be fine.

but it is known that could happen the the shredded belt twists behind the main crank shaft pulley and penetrates into the crank case.
look it up.
are you the OP?

MakkkD · 10-22-2017, 07:27 AM

Quote:

Originally Posted by DarkNemesis

Quote:

Originally Posted by MakkkD

No sir

ok, if you did not see any oil, on the belly pan or floor.
exactly when the belt shredded.
then you may be fine.

but it is known that could happen the the shredded belt twists behind the main crank shaft pulley and penetrates into the crank case.
look it up.
are you the OP?

Quote:

Originally Posted by DarkNemesis

Quote:

Originally Posted by MakkkD

No sir

ok, if you did not see any oil, on the belly pan or floor.
exactly when the belt shredded.
then you may be fine.

but it is known that could happen the the shredded belt twists behind the main crank shaft pulley and penetrates into the crank case.
look it up.
are you the OP?

I am not. My belt shredded an car died immediately upon start up. Has been fine for about a week now after install of new tensioner and pulley

Matt09i · 10-27-2017, 11:26 AM

Sorry for the late reply guys. This ended up being my xdrive transfer case. My 4x4 lights came back on after a reset, brought it in to my mechanic and replaced. No more noises or codes

08-17-2017, 07:28 AM	#1
Matt09i Enlisted Member 2 Rep 40 Posts Drives: 2009 335xi Join Date: Apr 2013 Location: NJ iTrader: (1)	Noise after turning the car off Hey guys, Last night when I got home and turned off my car (09 335i xdrive), it started making 2 loud noises. Similar to this video: Any idea what this noise is? Last edited by Matt09i; 08-21-2017 at 09:40 PM..
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08-17-2017, 07:56 AM	#2
Phil325i Brigadier General 616 Rep 3,194 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Have to say the idle speed in the vid sounds fast. One of the sounds is probably the pressure relief valve. Most engines these days have a valve to release pressure in the crankcase/breather system on switch-off. Mine makes a kind of 'pfffstt' noise after the engine stops, when I switch off. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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08-17-2017, 06:34 PM	#3
Matt09i Enlisted Member 2 Rep 40 Posts Drives: 2009 335xi Join Date: Apr 2013 Location: NJ iTrader: (1)	.... Last edited by Matt09i; 08-21-2017 at 09:41 PM..
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10-19-2017, 03:35 PM	#4
MakkkD Second Lieutenant 28 Rep 268 Posts Drives: 09 e92 335xi Join Date: Sep 2011 Location: Westchester, NY iTrader: (3)	did you resolve this issue? I was thinking tensioner belt since mine just busted last weekend. I'm at 106k BTW
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10-27-2017, 11:26 AM	#9
Matt09i Enlisted Member 2 Rep 40 Posts Drives: 2009 335xi Join Date: Apr 2013 Location: NJ iTrader: (1)	Sorry for the late reply guys. This ended up being my xdrive transfer case. My 4x4 lights came back on after a reset, brought it in to my mechanic and replaced. No more noises or codes
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