Crazy noise while engine is off

Mosely · 02-28-2019, 07:22 PM

What in the world is this noise? It happens shortly after shutting the engine off and will still be going an hour later. Been going on for a month now.

Tano · 03-01-2019, 03:33 PM

Someone posted earlier a similar issue and as I remember it was caused by the VALVETRONIC actuator. Item #1

orangeglim · 03-01-2019, 03:37 PM

My M235i did this one time I remember. It went away when I started the car, I never heard it again.

Mosely · 03-01-2019, 04:06 PM

Quote:

Originally Posted by Tano

Someone posted earlier a similar issue and as I remember it was caused by the VANOS actuator. Item #1

Interesting, as in it's a normal function or something the dealer needs to fix?

Mosely · 03-01-2019, 04:07 PM

Quote:

Originally Posted by orangeglim

My M235i did this one time I remember. It went away when I started the car, I never heard it again.

Mine seems to do it every time I drive. One time I washed my car and hadn't started it in 2+ hours and it was still making the noise.

orangeglim · 03-01-2019, 04:14 PM

Quote:

Originally Posted by Mosely

Mine seems to do it every time I drive. One time I washed my car and hadn't started it in 2+ hours and it was still making the noise.

Yep, that's when I noticed it on mine. Turned it on and off and it never did it again.

Tano · 03-02-2019, 03:28 PM

According to the factory description: "The Valvetronic servomotor is activated via pulse-width-modulation. The duty cycle is between 5 and 98 %."
This causes the chirping noise, so it is normal. The only question is if this is normal when the engine is off, and for how long? For such an extended period is suspicious for me.

TexasUp · 03-03-2019, 10:40 PM

Mine did this for the first time last weekend while cooling down after a track session. Glad to hear it's not related, and "normal".

02-28-2019, 07:22 PM	#1
Mosely Lieutenant 593 Rep 450 Posts Drives: '18 M2 \| '20 X5 \| '07 E92 Join Date: Mar 2017 Location: SoCal iTrader: (1)	Crazy noise while engine is off What in the world is this noise? It happens shortly after shutting the engine off and will still be going an hour later. Been going on for a month now. __________________ IG Photo Gallery: instagram.com/dr_m2sko/
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03-01-2019, 03:33 PM	#2
Tano Lieutenant 360 Rep 423 Posts Drives: BMW M2 Join Date: Oct 2015 Location: Hungary iTrader: (0)	Someone posted earlier a similar issue and as I remember it was caused by the VALVETRONIC actuator. Item #1 Last edited by Tano; 03-02-2019 at 03:23 PM.. Reason: Sorry, not VANOS, but VALVETRONIC.
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03-01-2019, 03:37 PM	#3
orangeglim Lieutenant 345 Rep 442 Posts Drives: 2019 M2C Join Date: May 2016 Location: NC iTrader: (0) Garage List 2019 M2C [0.00]	My M235i did this one time I remember. It went away when I started the car, I never heard it again.
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03-02-2019, 03:28 PM	#7
Tano Lieutenant 360 Rep 423 Posts Drives: BMW M2 Join Date: Oct 2015 Location: Hungary iTrader: (0)	According to the factory description: "The Valvetronic servomotor is activated via pulse-width-modulation. The duty cycle is between 5 and 98 %." This causes the chirping noise, so it is normal. The only question is if this is normal when the engine is off, and for how long? For such an extended period is suspicious for me.
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03-03-2019, 10:40 PM	#8
TexasUp New Member 5 Rep 12 Posts Drives: G87 M2 Join Date: Oct 2018 Location: Dallas, TX iTrader: (1)	Mine did this for the first time last weekend while cooling down after a track session. Glad to hear it's not related, and "normal".
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