Engine noise when hot...

Kcc · 07-11-2011, 05:12 PM

Drove 20min back home from work and went underground parking, back in the car, engine fan turn on, oil temp shows 115c and it is abit hot today (around 32c). All I hear inside the car is \"wuuuuuu\" (mid high tone), open up the engine, it sound louder with the hood up and the sound is coming from passenger side, near where the downpipe is. I had the midpipe changed to non-resonated and it is a N55 engine, nothing else modded related to speed.

Are those \"wuuuuu\" sound normal? Maybe the oil cooler is running? Or am I having some trouble here?

Please give me some idea and what I could do, thanks!

Kcc

P.s. 2011 N55, should be build after May, Coz I pick up the car on Aug.

stevenc · 07-11-2011, 05:39 PM

might be the water pump you are hearing. Water pump runs after the car is turned off to help cool the turbos.

BrokenVert · 07-11-2011, 05:49 PM

A big wuuuuuuuurrrrr sound? Yeah your engine was running a bit hot because of the heat outside and the radiator fan kicked it up a notch, it happens all the time at autox

Kcc · 07-11-2011, 07:24 PM

Engine is still on when I hear the constanly wuuuu sound.

the noise isn't coming from the fan, 100% positive.

Thanks for input.

Kcc

07-11-2011, 05:12 PM	#1
Kcc First Lieutenant 9 Rep 373 Posts Drives: 4 Wheels with a turbo Join Date: Jul 2010 Location: Markham, Toronto iTrader: (0)	Engine noise when hot... Drove 20min back home from work and went underground parking, back in the car, engine fan turn on, oil temp shows 115c and it is abit hot today (around 32c). All I hear inside the car is \"wuuuuuu\" (mid high tone), open up the engine, it sound louder with the hood up and the sound is coming from passenger side, near where the downpipe is. I had the midpipe changed to non-resonated and it is a N55 engine, nothing else modded related to speed. Are those \"wuuuuu\" sound normal? Maybe the oil cooler is running? Or am I having some trouble here? Please give me some idea and what I could do, thanks! Kcc P.s. 2011 N55, should be build after May, Coz I pick up the car on Aug. __________________ 135i - AW
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07-11-2011, 05:39 PM	#2
stevenc Coming Soon 254 Rep 960 Posts Drives: 2015 BMW M4 Alphine White MT Join Date: Apr 2008 Location: Houston, TX iTrader: (0)	might be the water pump you are hearing. Water pump runs after the car is turned off to help cool the turbos.
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07-11-2011, 05:49 PM	#3
BrokenVert Resident Kerbalnaut 477 Rep 10,703 Posts Drives: Topless Brute/Hybrid Boogaloo Join Date: Apr 2009 Location: Fahrvergnügen/NY iTrader: (0)	A big wuuuuuuuurrrrr sound? Yeah your engine was running a bit hot because of the heat outside and the radiator fan kicked it up a notch, it happens all the time at autox __________________
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07-11-2011, 07:24 PM	#4
Kcc First Lieutenant 9 Rep 373 Posts Drives: 4 Wheels with a turbo Join Date: Jul 2010 Location: Markham, Toronto iTrader: (0)	Engine is still on when I hear the constanly wuuuu sound. the noise isn't coming from the fan, 100% positive. Thanks for input. Kcc __________________ 135i - AW
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