Noise from engine compartment after shut off

joeyg4282 · 01-16-2009, 05:27 PM

Hi, I just picked up an 08 Alpine white 135i for my wife. I parked it in the garage on arriving home and noticed that even after 30 minutes from the time I shut off the ignition, there is a noise emitting from the engine compartment that sounds like a cross between a transmitter and fax machine.

I've never owner a BMW before so have no experience with the car and the dealership is closed for the night now.

Joe

dsomc6 · 01-16-2009, 05:48 PM

That's normal - it takes more than 30 minutes for the car to go sleep. Until then the car electronics are still awake and making noise. Also, if its a new car all of the part tolerances are still really tight and you will likely hear noises during the heating and cooling phase due to the expansion of the metals.

gyrfalcon · 01-16-2009, 07:52 PM

As mentioned it's normal. The oil pump is running oil through the turbos to make sure they are cooled down properly.

Oregon · 01-17-2009, 01:45 AM

Quote:

Originally Posted by joeyg

Hi, I just picked up an 08 Alpine white 135i for my wife. I parked it in the garage on arriving home and noticed that even after 30 minutes from the time I shut off the ignition, there is a noise emitting from the engine compartment that sounds like a cross between a transmitter and fax machine.

I've never owner a BMW before so have no experience with the car and the dealership is closed for the night now.

Joe

Did you turn off the climate control before shutting off the engine? Leaving the climate control active then shutting down the engine will generate a buzz from the engine compartment.

boxerdog · 01-17-2009, 01:56 AM

I hear the same noise out of mine. Nothing to worry about.. Congrats and enjoy the car.

x97Melbourne · 01-17-2009, 10:42 AM

yeah that happens to a lot of cars -- there is often a cooling fan to cool down the engine compartiment -- especially if you just finished beating on the car.
i'd be willing to bet its more common on a manual trans car because i think the engine has to work a little harder -- especially in stop/go traffic

joeyg4282 · 01-17-2009, 01:57 PM

Thanks everyone for the information...it stopped after awhile.

Joe

01-16-2009, 05:27 PM	#1
joeyg4282 Private First Class 25 Rep 139 Posts Drives: 2014 BMW 435i XDrive Sapphire Join Date: May 2008 Location: Ancaster Ontario iTrader: (0)	Noise from engine compartment after shut off Hi, I just picked up an 08 Alpine white 135i for my wife. I parked it in the garage on arriving home and noticed that even after 30 minutes from the time I shut off the ignition, there is a noise emitting from the engine compartment that sounds like a cross between a transmitter and fax machine. I've never owner a BMW before so have no experience with the car and the dealership is closed for the night now. Joe
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01-16-2009, 05:48 PM	#2
dsomc6 Private 8 Rep 73 Posts Drives: E46 M3 / M4 / M4 Cab (Sold) Join Date: Aug 2006 Location: Oakville, ON, Canada iTrader: (0)	That's normal - it takes more than 30 minutes for the car to go sleep. Until then the car electronics are still awake and making noise. Also, if its a new car all of the part tolerances are still really tight and you will likely hear noises during the heating and cooling phase due to the expansion of the metals.
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01-16-2009, 07:52 PM	#3
gyrfalcon Ninja 14 Rep 335 Posts Drives: 135i Join Date: Mar 2008 Location: Texas iTrader: (0)	As mentioned it's normal. The oil pump is running oil through the turbos to make sure they are cooled down properly. __________________ SGM/Coral
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01-17-2009, 01:56 AM	#5
boxerdog Private First Class 11 Rep 117 Posts Drives: Black Saphire 135i Spt & Prem Join Date: Jan 2009 Location: Minneapolis iTrader: (0)	I hear the same noise out of mine. Nothing to worry about.. Congrats and enjoy the car.
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01-17-2009, 10:42 AM	#6
x97Melbourne Molar World 47 Rep 916 Posts Drives: 2016 435i Coupe Join Date: Apr 2008 Location: Florida iTrader: (0)	yeah that happens to a lot of cars -- there is often a cooling fan to cool down the engine compartiment -- especially if you just finished beating on the car. i'd be willing to bet its more common on a manual trans car because i think the engine has to work a little harder -- especially in stop/go traffic __________________ Current: 2016 435i Coupe Previous: 2014 335i Sedan; 2013 328i Cv, 2011 335i Sedan Gone But Not Forgotten: 2008 135i Convertible (my favorite)
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01-17-2009, 01:57 PM	#7
joeyg4282 Private First Class 25 Rep 139 Posts Drives: 2014 BMW 435i XDrive Sapphire Join Date: May 2008 Location: Ancaster Ontario iTrader: (0)	Thanks everyone for the information...it stopped after awhile. Joe __________________ 2016 Ram 1500 Sport Crew White 2014 BMW 435i XDrive M-Sport Sapphire Black 2008 BMW 135i Alpine White (sold)
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