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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Mechanical Maintenance: Break-in / Oil & Fluids / Servicing / Warranty > Noise after turning the car off



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      08-17-2017, 08:28 AM   #1
Matt09i
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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 10:40 PM.
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      08-17-2017, 08:56 AM   #2
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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.
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      08-17-2017, 07:34 PM   #3
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Last edited by Matt09i; 08-21-2017 at 10:41 PM.
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      10-19-2017, 04:35 PM   #4
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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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      10-21-2017, 02:17 AM   #5
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Quote:
Originally Posted by MakkkD View Post
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?
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      10-21-2017, 07:51 AM   #6
MakkkD
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Quote:
Originally Posted by DarkNemesis View Post
Quote:
Originally Posted by MakkkD View Post
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 View Post
Quote:
Originally Posted by MakkkD View Post
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
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      10-22-2017, 05:00 AM   #7
DarkNemesis
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Quote:
Originally Posted by MakkkD View Post
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?
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      10-22-2017, 08:27 AM   #8
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Quote:
Originally Posted by DarkNemesis View Post
Quote:
Originally Posted by MakkkD View Post
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 View Post
Quote:
Originally Posted by MakkkD View Post
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
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      10-27-2017, 12:26 PM   #9
Matt09i
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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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