Air pressure sound from 1st to 2nd gear

BRAISKI · 07-28-2011, 03:51 PM

Every time or usually when I shift from 1st to 2nd gear I hear a pressure released sound when letting go of the clutch.

Does anyone know what is it or why it happens?

pc4400 · 07-28-2011, 04:06 PM

I get the same thing when in manual mode, shifting from 1st to 2nd, only once though. I assumed it's cuz the engine is not at optimum temperature yet. It's sounds kind of like a BOV

Patrick303 · 07-28-2011, 04:09 PM

Probably the stock DVs. I was able to hear mine sometimes, especially with my windows down.

BRAISKI · 07-28-2011, 04:36 PM

But the sound seems to be from he inside after releasing the clutch. I can hear the BOV when I open the windows esp passenger side.

I am just driving normally and the car is already warm and all.

07-28-2011, 03:51 PM	#1
BRAISKI Colonel 135 Rep 2,517 Posts Drives: '11 335xi e92 M-Pak Join Date: Mar 2009 Location: GTA/KW, Canada iTrader: (3) Garage List 2011 BMW 335xi [7.00]	Air pressure sound from 1st to 2nd gear Every time or usually when I shift from 1st to 2nd gear I hear a pressure released sound when letting go of the clutch. Does anyone know what is it or why it happens? __________________ My 2011 ED @ BMW Welt, one of the best days of my life! Full front PPF!
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07-28-2011, 04:06 PM	#2
pc4400 Second Lieutenant 19 Rep 203 Posts Drives: 335i Join Date: Oct 2009 Location: SoCal iTrader: (0)	I get the same thing when in manual mode, shifting from 1st to 2nd, only once though. I assumed it's cuz the engine is not at optimum temperature yet. It's sounds kind of like a BOV
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07-28-2011, 04:09 PM	#3
Patrick303 Lieutenant 675 Rep 474 Posts Drives: F36 440i GC Join Date: Jan 2011 Location: Denver, CO iTrader: (2) Garage List 2017 Ducati Monster ... [0.00] 2017 BMW 440i xDriv ... [0.00]	Probably the stock DVs. I was able to hear mine sometimes, especially with my windows down. __________________ 2024 Porsche Taycan 4S 2017 Ducati Monster 821
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07-28-2011, 04:36 PM	#4
BRAISKI Colonel 135 Rep 2,517 Posts Drives: '11 335xi e92 M-Pak Join Date: Mar 2009 Location: GTA/KW, Canada iTrader: (3) Garage List 2011 BMW 335xi [7.00]	But the sound seems to be from he inside after releasing the clutch. I can hear the BOV when I open the windows esp passenger side. I am just driving normally and the car is already warm and all. __________________ My 2011 ED @ BMW Welt, one of the best days of my life! Full front PPF!
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