since my 335i is twin turbo do you need to let it idle before you turn it off?

mwarsh1 · 08-03-2008, 04:46 AM

?

LOLrance · 08-03-2008, 04:58 AM

no.

/fread

AWM3 · 08-03-2008, 05:40 AM

If you notice immediately after turning the car off there is a sound of a pump running for a minute or two, that may be for cooling the turbos after shut down. Perhaps someone else with more specific knowledge of this engine can confirm that, or explain what that sound is. You certainly aren't going to cause any harm by letting the car idle for a minute before shutting it off, and in the old days that was a common recommendation with turbo cars.

John 070 · 08-03-2008, 05:54 AM

Quote:

Originally Posted by car62

If you notice immediately after turning the car off there is a sound of a pump running for a minute or two, that may be for cooling the turbos after shut down. Perhaps someone else with more specific knowledge of this engine can confirm that, or explain what that sound is. You certainly aren't going to cause any harm by letting the car idle for a minute before shutting it off, and in the old days that was a common recommendation with turbo cars.

That sound is something else....I had a 4 cyl. Altima rental on business, and it had the very same sound upon turning the motor off....

joec500 · 08-03-2008, 10:47 AM

absolutely not...Our cars, like most modern turbo cars have an electric coolant pump that circulates coolant/oil through the turbo to insure that hot oil does not sit in the turbo. If you look at the sticky, they mention this under the "turbo" section. So feel free, to hit it and quit it.

e90AW335i · 08-03-2008, 10:51 AM

Quote:

Originally Posted by John 070

That sound is something else....I had a 4 cyl. Altima rental on business, and it had the very same sound upon turning the motor off....

Wrong. The sound that you hear when you turn ours off is the electric water pump continuing to run to make sure that the turbos cool off.

BoostedBMW · 08-03-2008, 11:57 AM

Quote:

Originally Posted by joec500

absolutely not...Our cars, like most modern turbo cars have an electric coolant pump that circulates coolant/oil through the turbo to insure that hot oil does not sit in the turbo. If you look at the sticky, they mention this under the "turbo" section. So feel free, to hit it and quit it.

So, the coolant pump circulates oil too?

That's one of the reasons why I drive my car easy for the last mile or so if I've been getting on it hard.

5soko · 08-03-2008, 01:34 PM

i bet the engineers at munich have thought of this!! lol

AWM3 · 08-03-2008, 08:32 PM

Quote:

Originally Posted by BoostedBMW

So, the coolant pump circulates oil too?

That's one of the reasons why I drive my car easy for the last mile or so if I've been getting on it hard.

Not oil, just water.

BoostedBMW · 08-03-2008, 09:05 PM

Quote:

Originally Posted by car62

Not oil, just water.

That's what the smiley is for.

TiAg335i · 08-03-2008, 09:20 PM

Are you seriously doubting the BMW engineers and researchers that they wouldn't have the foresight to think of this?

BoostedBMW · 08-03-2008, 10:17 PM

Quote:

Originally Posted by TiAg335i

Are you seriously doubting the BMW engineers and researchers that they wouldn't have the foresight to think of this?

Who are you referring to? I don't see anyone doubting BMW, but you should realize that your water pump isn't going to continue to cycle oil through your oil lines so driving the car easy for a few minutes after some hard driving isn't a bad idea either.

closer98 · 08-05-2008, 08:39 PM

absolutely not

smdandb2 · 08-05-2008, 11:06 PM

Quote:

Originally Posted by BoostedBMW

Who are you referring to? I don't see anyone doubting BMW, but you should realize that your water pump isn't going to continue to cycle oil through your oil lines so driving the car easy for a few minutes after some hard driving isn't a bad idea either.

Agreed.

Don't forget BMW failed to put oil coolers on a lot of the N54 cars.

08-03-2008, 04:46 AM	#1
mwarsh1 Second Lieutenant 33 Rep 291 Posts Drives: 335i sedan Join Date: Jul 2008 Location: roslyn ny iTrader: (1)	since my 335i is twin turbo do you need to let it idle before you turn it off? ?
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08-03-2008, 04:58 AM	#2
LOLrance The Law. 301 Rep 14,283 Posts Drives: BMW Join Date: Apr 2005 Location: SF / OC iTrader: (17)	no. /fread __________________
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08-03-2008, 05:40 AM	#3
AWM3 BMW Fan 11 Rep 553 Posts Drives: 2012 E92 M3, Alpine White Join Date: Apr 2008 Location: Georgia, USA iTrader: (0)	If you notice immediately after turning the car off there is a sound of a pump running for a minute or two, that may be for cooling the turbos after shut down. Perhaps someone else with more specific knowledge of this engine can confirm that, or explain what that sound is. You certainly aren't going to cause any harm by letting the car idle for a minute before shutting it off, and in the old days that was a common recommendation with turbo cars.
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08-03-2008, 10:47 AM	#5
joec500 Brigadier General 125 Rep 3,004 Posts Drives: it has 4 wheels Join Date: Jul 2008 Location: San Francisco iTrader: (10)	absolutely not...Our cars, like most modern turbo cars have an electric coolant pump that circulates coolant/oil through the turbo to insure that hot oil does not sit in the turbo. If you look at the sticky, they mention this under the "turbo" section. So feel free, to hit it and quit it.
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08-03-2008, 01:34 PM	#8
5soko Brigadier General 332 Rep 4,632 Posts Drives: M5 Join Date: Aug 2007 Location: Brooklyn, NY iTrader: (4)	i bet the engineers at munich have thought of this!! lol
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08-03-2008, 09:20 PM	#11
TiAg335i Trance Life 315 Rep 4,706 Posts Drives: 2007 E92 335i Join Date: Jan 2007 Location: Long Island, NY iTrader: (4)	Are you seriously doubting the BMW engineers and researchers that they wouldn't have the foresight to think of this?
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08-05-2008, 08:39 PM	#13
closer98 Private First Class 10 Rep 155 Posts Drives: 2012 Audi S4 & 2012 MB GL 550 Join Date: May 2008 Location: New York iTrader: (0)	absolutely not __________________ Retired 2008 E90 M3 Sparkling Graphite/Black 6 Speed 2008 E90 335i Silver/Black 6 Speed 2005 E60 545i Gray/Black 6 Speed
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