335i screeming high pitch when revving fast

ians · 09-19-2015, 11:22 PM

My 335 N54 suddenly start having a high pitch screaming when rev it fast as the video attached. If rev it up slowly or rev at neutral, it won't scream! Any idea?

https://youtu.be/RWNfu1hyG6E

alexg212 · 09-19-2015, 11:44 PM

I say belt tensioner.

Alienpsychologist · 09-20-2015, 02:24 AM

Sounds awful and my guess is a belt, tensioner or pully issue. please have it looked at promptly and good luck.

BashShah · 09-20-2015, 02:50 AM

You better make sure your belt is not partially torn.....Google 335i shredded belt.
You won't like the end results....like engine replacement.

But if it is the belt..... Look up my DIY on N54 serpentine belt, Tensioner, and upper and lower pulley replacement.

DN

Fun w/N54 · 09-20-2015, 09:31 AM

How many miles on car? Lots of posts over the years questioning WHEN the belt should be replaced. Don't recall any video or sound description quite like that. Good luck and let us know the outcome.

kaigoss69 · 09-20-2015, 10:25 AM

Have that looked at pronto!

ians · 09-20-2015, 04:57 PM

Quote:

Originally Posted by DarkNemesis

You better make sure your belt is not partially torn.....Google 335i shredded belt.
You won't like the end results....like engine replacement.

But if it is the belt..... Look up my DIY on N54 serpentine belt, Tensioner, and upper and lower pulley replacement.

DN

Won't able to see if belt is torn or not. I am going to drop it off to mechanic after the weekend.

ians · 09-20-2015, 04:58 PM

Quote:

Originally Posted by Fun w/N54

How many miles on car? Lots of posts over the years questioning WHEN the belt should be replaced. Don't recall any video or sound description quite like that. Good luck and let us know the outcome.

less than 58000 miles

Wilt · 09-20-2015, 05:58 PM

I have had tensioners and pulleys wear out on an E46...it simply squeaked/chirped.

Lack of sufficient tension might result in slippage of the belt as the engine suddenly revs to higher rpm, for that howling to result.

ians · 09-20-2015, 06:46 PM

Quote:

Originally Posted by Wilt

I have had tensioners and pulleys wear out on an E46...it simply squeaked/chirped.

Lack of sufficient tension might result in slippage of the belt as the engine suddenly revs to higher rpm, for that howling to result.

hm... but my car other than the scary scream, drive nothing wrong and also no problem to start

Wilt · 09-20-2015, 06:56 PM

Yeah, and other than the squeak annoying me mostly when a window was open, there was nothing wrong with my E46 either, when it needed a tensioner or pulley. I brought the car in for other routine service (oil change), and asked the SA to have the squeak investigated. They reported by phone 'tensioner' or 'pulley' and I authorized the work and then picked up the car. It was still normal (like when I dropped it off), but not squeaky.

Have them check it out, if it is simply the need to tighten things, maybe it is a good indication to change the belt for a new one (which is not drying out and having a polished surface from the slippage on rotating surfaces

ians · 09-26-2015, 05:58 PM

My mechanic found out it was because the host that connected to intercooler was cracked! He need to order a replacement, the parts won't be expensive but require some labour work

fazman · 09-26-2015, 08:25 PM

Quote:

Originally Posted by ians

My mechanic found out it was because the host that connected to intercooler was cracked! He need to order a replacement, the parts won't be expensive but require some labour work

if your already gonna pay for intercooler labor... you might as well swap out the stock intercooler for an aftermarket intercooler. plus while the intercooler is out... easy to drain and refill your coolant.

BSM n54iS · 09-26-2015, 08:42 PM

Quote:

Originally Posted by fazman

if your already gonna pay for intercooler labor... you might as well swap out the stock intercooler for an aftermarket intercooler. plus while the intercooler is out... easy to drain and refill your coolant.

+1

But you haven't noticed a loss in boost..?

ians · 09-26-2015, 10:18 PM

Quote:

Originally Posted by fazman

if your already gonna pay for intercooler labor... you might as well swap out the stock intercooler for an aftermarket intercooler. plus while the intercooler is out... easy to drain and refill your coolant.

already with 7" upgraded intercooler

ians · 09-26-2015, 10:20 PM

Quote:

Originally Posted by Black n54is

+1

But you haven't noticed a loss in boost..?

After I heard the noise, I didn't drive it hard at all to feel losing boost. But for regular driving, no power loss being feel

mojobmw_e90 · 09-27-2015, 12:25 AM

Check the oil filter. If it's compressing under load it's preventing proper flow

09-19-2015, 11:22 PM	#1
ians Major 40 Rep 1,283 Posts Drives: 08 E92 335i 6MT, 04 TSX 6MT Join Date: Aug 2007 Location: Toronto iTrader: (0)	335i screeming high pitch when revving fast My 335 N54 suddenly start having a high pitch screaming when rev it fast as the video attached. If rev it up slowly or rev at neutral, it won't scream! Any idea? https://youtu.be/RWNfu1hyG6E __________________ 08 Montego Blue E92 335i 6MT sp Navi with beige interior aero front, Mtech side, M rear lip spoiler, hid fog, 19" Work Varianza T1S, KW V2, Mtech steering wheel, shift knob, e-brake handle & alumnium pedal
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09-19-2015, 11:44 PM	#2
alexg212 Second Lieutenant 52 Rep 278 Posts Drives: 335is Coupe/Mustang Gt Join Date: Oct 2013 Location: DFW iTrader: (0)	I say belt tensioner.
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09-20-2015, 02:24 AM	#3
Alienpsychologist Enlisted Member 14 Rep 31 Posts Drives: 2007 E92 335i Join Date: Aug 2015 Location: Seattle, WA iTrader: (0) Garage List 2007 BMW 335i [0.00]	Sounds awful and my guess is a belt, tensioner or pully issue. please have it looked at promptly and good luck.
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09-20-2015, 02:50 AM	#4
BashShah Colonel 296 Rep 2,015 Posts Drives: 2012 335i Sedan Join Date: Oct 2012 Location: Vancouver, Canada iTrader: (0)	You better make sure your belt is not partially torn.....Google 335i shredded belt. You won't like the end results....like engine replacement. But if it is the belt..... Look up my DIY on N54 serpentine belt, Tensioner, and upper and lower pulley replacement. DN
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09-20-2015, 09:31 AM	#5
Fun w/N54 Lieutenant 39 Rep 592 Posts Drives: '11 E92 335is AW/CR/DCT Join Date: Apr 2011 Location: WI iTrader: (2)	How many miles on car? Lots of posts over the years questioning WHEN the belt should be replaced. Don't recall any video or sound description quite like that. Good luck and let us know the outcome. __________________ Evolution Racewerks FMIC and Charge Pipe with TIAL-Q. Wedge Tuned 93 Oct, K&N Panel, Conti DWS 245/275.
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09-20-2015, 10:25 AM	#6
kaigoss69 Brigadier General 300 Rep 3,969 Posts Drives: '08 335i Join Date: Jul 2008 Location: JAX iTrader: (6)	Have that looked at pronto! __________________ Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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09-20-2015, 05:58 PM	#9
Wilt Major 228 Rep 1,045 Posts Drives: 2011 328i Join Date: Mar 2015 Location: SF Bay area iTrader: (0)	I have had tensioners and pulleys wear out on an E46...it simply squeaked/chirped. Lack of sufficient tension might result in slippage of the belt as the engine suddenly revs to higher rpm, for that howling to result.
	Appreciate 0 Quote

09-20-2015, 06:56 PM	#11
Wilt Major 228 Rep 1,045 Posts Drives: 2011 328i Join Date: Mar 2015 Location: SF Bay area iTrader: (0)	Yeah, and other than the squeak annoying me mostly when a window was open, there was nothing wrong with my E46 either, when it needed a tensioner or pulley. I brought the car in for other routine service (oil change), and asked the SA to have the squeak investigated. They reported by phone 'tensioner' or 'pulley' and I authorized the work and then picked up the car. It was still normal (like when I dropped it off), but not squeaky. Have them check it out, if it is simply the need to tighten things, maybe it is a good indication to change the belt for a new one (which is not drying out and having a polished surface from the slippage on rotating surfaces Last edited by Wilt; 09-20-2015 at 07:01 PM..
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09-26-2015, 05:58 PM	#12
ians Major 40 Rep 1,283 Posts Drives: 08 E92 335i 6MT, 04 TSX 6MT Join Date: Aug 2007 Location: Toronto iTrader: (0)	My mechanic found out it was because the host that connected to intercooler was cracked! He need to order a replacement, the parts won't be expensive but require some labour work __________________ 08 Montego Blue E92 335i 6MT sp Navi with beige interior aero front, Mtech side, M rear lip spoiler, hid fog, 19" Work Varianza T1S, KW V2, Mtech steering wheel, shift knob, e-brake handle & alumnium pedal
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09-27-2015, 12:25 AM	#17
mojobmw_e90 Major 380 Rep 1,497 Posts Drives: 2014 E63S Join Date: Oct 2014 Location: Chicago IL iTrader: (3)	Check the oil filter. If it's compressing under load it's preventing proper flow
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