Turbo Timer?

az335i · 02-09-2007, 12:04 AM

I've had my 335 for a week now, and tonight I noticed a humming sound coming from under the hood after I parked and turned the engine off. Before I could open the hood to investigate, the sound stopped. My kid's SRT4 had a similar sound after he installed a turbo timer to circulate turbo oil after shutdown. Does the 335 come with a stock timer?

wj4 · 02-09-2007, 12:20 AM

No, a turbo timer keeps the car on for x amount of mins after the key has been removed.

335boosted2Dmax · 02-09-2007, 12:23 AM

Probably was just the fan after you probably drove the car hard huh?.........

Walked U · 02-09-2007, 12:23 AM

Quote:

Originally Posted by az335i

I've had my 335 for a week now, and tonight I noticed a humming sound coming from under the hood after I parked and turned the engine off. Before I could open the hood to investigate, the sound stopped. My kid's SRT4 had a similar sound after he installed a turbo timer to circulate turbo oil after shutdown. Does the 335 come with a stock timer?

Ya thats the so call " turbo timer " sound.

Our cars dont have turbo timers. But have something that works like it.

az335i · 02-09-2007, 12:24 AM

OK, I'll check it out with the dealer engine tech tomorrow and will post what I find!

Walked U · 02-09-2007, 12:25 AM

Quote:

Originally Posted by az335i

OK, I'll check it out with the dealer engine tech tomorrow and will post what I find!

Does it sound like a low pitch knock almost?

az335i · 02-09-2007, 12:28 AM

Dmax, It's difficult not to drive the car hard!:rocks:

az335i · 02-09-2007, 12:37 AM

Quote:

Originally Posted by Walked U

Does it sound like a low pitch knock almost?

No, just a low humming. Sounds "normal" as in not a malfunction.

Walked U · 02-09-2007, 12:43 AM

Quote:

Originally Posted by az335i

No, just a low humming. Sounds "normal" as in not a malfunction.

Thats the oil recirculating. The knock happens right before the hum

King335i · 02-09-2007, 12:48 AM

I have the same noise. Nothing seems out of place.

leftcoastman · 02-09-2007, 12:52 AM

That's your coolant circulating. Here's the thing. I get a humming sound intermittently when idling! Anyone else get that?

e30klassic · 02-09-2007, 01:03 AM

yeah folks, its just the electric water pump doing her job. It humm like a small jet engine even when the engine's off .

Stein · 02-09-2007, 02:23 AM

It's the BMW equivelent of a turbo timer.

its · 02-09-2007, 02:48 AM

newer generation turbocharged cars dont come with turbo timers since most of their turbos are both oil and water cooled.

you only need them for the oil-cooled turbos...

jonerik26 · 02-09-2007, 03:43 AM

good to know

GTGeo96 · 02-26-2007, 07:32 PM

Quote:

Originally Posted by Walked U

Ya thats the so call " turbo timer " sound.

Our cars dont have turbo timers. But have something that works like it.

correct.....sortta.

your engines all have electronic water-pumps. If the car feels the engine is not cool enough when you shut the car off, it will keep running the water pump as long as it needs to(usualy 2-4 minutes) to help cool off the turbos and prevent damage. This is why our cars dont need turbo timers and DEF do not need the annoying idle time that everyone else warns you about. BMW designed this car to be like everything else...the last thing they want is their new product to be a pain in the ass.

02-09-2007, 12:04 AM	#1
az335i New Member 1 Rep 19 Posts Drives: 07 sedan slush box Join Date: Feb 2007 Location: Arizona iTrader: (0)	Turbo Timer? I've had my 335 for a week now, and tonight I noticed a humming sound coming from under the hood after I parked and turned the engine off. Before I could open the hood to investigate, the sound stopped. My kid's SRT4 had a similar sound after he installed a turbo timer to circulate turbo oil after shutdown. Does the 335 come with a stock timer?
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02-09-2007, 12:20 AM	#2
wj4 Major General 358 Rep 7,719 Posts Drives: E90 manual 335i Join Date: Nov 2006 Location: Burbank, CA iTrader: (8)	No, a turbo timer keeps the car on for x amount of mins after the key has been removed.
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02-09-2007, 12:23 AM	#3
335boosted2Dmax Banned 12 Rep 323 Posts Drives: Boosted Join Date: Feb 2007 Location: Long Island iTrader: (0)	Probably was just the fan after you probably drove the car hard huh?.........
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02-09-2007, 12:24 AM	#5
az335i New Member 1 Rep 19 Posts Drives: 07 sedan slush box Join Date: Feb 2007 Location: Arizona iTrader: (0)	OK, I'll check it out with the dealer engine tech tomorrow and will post what I find!
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02-09-2007, 12:28 AM	#7
az335i New Member 1 Rep 19 Posts Drives: 07 sedan slush box Join Date: Feb 2007 Location: Arizona iTrader: (0)	Dmax, It's difficult not to drive the car hard!:rocks:
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02-09-2007, 12:48 AM	#10
King335i Captain 48 Rep 726 Posts Drives: '13 E92 M3 CP 6MT, '13 X1 35i Join Date: Nov 2006 Location: Eugene, Oregon iTrader: (1)	I have the same noise. Nothing seems out of place. __________________ 2007 E92 335i--SG, Fully loaded, minus the dead weight..err..iDrive and Active Steering.
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02-09-2007, 12:52 AM	#11
leftcoastman Lieutenant Colonel 55 Rep 1,714 Posts Drives: 335i Join Date: Jan 2007 Location: Near some canyons iTrader: (1)	That's your coolant circulating. Here's the thing. I get a humming sound intermittently when idling! Anyone else get that?
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02-09-2007, 01:03 AM	#12
e30klassic Banned 28 Rep 375 Posts Drives: Sport T-Silver E90 Join Date: Oct 2005 Location: SF, Ca. iTrader: (2) Garage List 2006 328i [0.00]	yeah folks, its just the electric water pump doing her job. It humm like a small jet engine even when the engine's off .
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02-09-2007, 02:23 AM	#13
Stein Private First Class 12 Rep 174 Posts Drives: 2011 M3 Join Date: Jun 2006 Location: Rip City iTrader: (0)	It's the BMW equivelent of a turbo timer.
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02-09-2007, 02:48 AM	#14
its First Lieutenant 31 Rep 329 Posts Drives: AW e92 335i Join Date: Feb 2007 Location: West LA iTrader: (15)	newer generation turbocharged cars dont come with turbo timers since most of their turbos are both oil and water cooled. you only need them for the oil-cooled turbos...
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02-09-2007, 03:43 AM	#15
jonerik26 Lieutenant Colonel 59 Rep 1,906 Posts Drives: black 335i e90 PRE-LCI Join Date: Apr 2006 Location: somewhere iTrader: (23) Garage List 2007 335i [8.00] 1998 Acura Integra [8.50] 2006 325i [8.00]	good to know __________________
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