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Diesel Engine warm up and cool down time
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09-21-2009, 12:15 PM | #1 |
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Diesel Engine warm up and cool down time
Folks,
Waiting to receive my 2010 335d and saw some discussion elsewhere about warm up/cool down periods. Can anyone say exactly what does the manual say about this? Typically it is always good to give an engine a minute or two to warm up and cool down before putting in gear. I'm sure many folks don't do that. I know some diesel cars actually have a shut off timer built in, that after you remove the key the engine keeps running for approx 1 minute to cool down the turbo. I certainly understand why you may want to do this, but is it built in that way on the BMW? Most cars actually idle a bit higher when you first start them, then after about 30-60 seconds they slow down, and that is when I usually engage the gears. I also usually wait about 15-30 seconds before I turn off my engine, and that is with a gasoline engine, with and without a turbo. I've heard that some engines (diesels and gas) with a turbo can have turbo damage if you shutdown with the turbo too hot, i.e. you were driving hard and then shut it down. As I recall the concern was that the housing and rotor are still rather hot and the oil stops circulating around the bearing, perhaps leading to a seizure. Appreciate hearing what facts (or myths or urban legends) if any are out there about this on the BMW diesel engine. |
09-21-2009, 12:37 PM | #2 |
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If you live in Miami why do you worry about warm up? Diesel engines are only problematic in the extreme cold climate If you live in Alaska . BMW turbos is water cooled . When you shut the the engine off an electric pump is still cooling the turbos off. Once its cool enough the pump willl stop circulating the coolant.
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09-21-2009, 12:43 PM | #3 |
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Haven't you heard of Global Warming? Just preparing for the next ice age!
Good to know about the electric cooling water pump. I was not aware of that detail. I've heard of electric fans turning off after shutdown, but if it is circulating the water, that should work nicely. Extreme cold temps for me is like 68 deg F. I almost can't get in my pool on those days. My pool temp has been around 87deg this summer. Just was wondering what if anything is in the manuals on this subject. |
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09-22-2009, 01:17 AM | #4 |
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The only recommendation I´ve seen is that they say advice a 1 minut cool down on idle if you have been pushing the engine hard or your over the nominal operating temps.
What kills diesels is mostly full throttle while the engine is cold. Just be careful with the throttle until you get to around 2/3´ds of operating temps. After that, you can mash the throttle all you want. Then take it easy the last 2 miles home. //amullo |
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06-24-2015, 05:17 AM | #5 |
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bmw pours pretty liquid oil in their diesel and preheating coils activated when drivers door opened, so don't worry, start engine and drive, you will not have problem in Miami climate
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06-24-2015, 10:21 AM | #7 |
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With the EGR blocked warm up will take a little longer.
Monitor the car with torque and see exactly how long it takes. It is also dependent upon the ambient temperature. Cool down is totally different story. It takes a looong time. There is no need for a turbo cool down unless you are in the middle of the regeneration or are racing on the streets. The EGT will let you know haw hot the exhaust is and what the turbos get. If you are below 400F when you park the car, you're golden. |
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06-24-2015, 11:03 AM | #8 | ||
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FYI, I have seen only a couple stories posted about turbo failure on bmw diesels on the www. Also FYI, our diesels barely warm up if the temp is under, say 40 degrees F and you're not really stomping it. Get one of the OBD reader guages if you want to watch coolant temp. |
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06-24-2015, 01:40 PM | #9 |
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for a single test it easier to use instrument panel test, test no 7 will show coolant temp
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06-25-2015, 09:39 AM | #11 |
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06-25-2015, 04:39 PM | #12 |
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a good thing! it is very robust and durable. To be completely honest, it does suck and it sucks rather well! to the tune over 26.5psi!
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06-25-2015, 11:52 PM | #13 | |
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Drives: 2010 BMW 335d
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Garage List 2010 BMW 335d [8.50]
2010 X5 35d [0.00] 2006 BMW 760i [0.00] 2002 BMW e39 540i S ... [0.00] 2014 BMW X5M [0.00] 1988 Pontiac GTA [0.00] 2005 KTM 950 Adventure [0.00] 2007 KTM 990 Adventure [0.00] 2012 BMW GS650GS Se ... [0.00] 2001 KTM 520EXC [0.00] 1989 Chevy IROC ASC ... [0.00] 1984 Dodge Ramcharg ... [0.00] 1997 Husaberg FC600 [0.00] 2015 Can-Am Outland ... [0.00] 2004 Ford F350 Supe ... [0.00] |
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06-26-2015, 12:02 AM | #14 |
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Garage List 2010 BMW 335d [8.50]
2010 X5 35d [0.00] 2006 BMW 760i [0.00] 2002 BMW e39 540i S ... [0.00] 2014 BMW X5M [0.00] 1988 Pontiac GTA [0.00] 2005 KTM 950 Adventure [0.00] 2007 KTM 990 Adventure [0.00] 2012 BMW GS650GS Se ... [0.00] 2001 KTM 520EXC [0.00] 1989 Chevy IROC ASC ... [0.00] 1984 Dodge Ramcharg ... [0.00] 1997 Husaberg FC600 [0.00] 2015 Can-Am Outland ... [0.00] 2004 Ford F350 Supe ... [0.00] |
Fwiw, the only difference I notice when cold is that the tranny holds gears a little longer.[/QUOTE]
In the programming of all modern vehicles to get the cats to "light-off" quicker to decrease emissions and also warmup time when cold. Promotes a leaner burn |
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07-09-2015, 12:57 AM | #15 | |
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2011 335d:Mostly stock for now
2007 BMW K1200s: PCIII |
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07-09-2015, 08:19 AM | #16 |
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Garage List 2010 BMW 335d [8.50]
2010 X5 35d [0.00] 2006 BMW 760i [0.00] 2002 BMW e39 540i S ... [0.00] 2014 BMW X5M [0.00] 1988 Pontiac GTA [0.00] 2005 KTM 950 Adventure [0.00] 2007 KTM 990 Adventure [0.00] 2012 BMW GS650GS Se ... [0.00] 2001 KTM 520EXC [0.00] 1989 Chevy IROC ASC ... [0.00] 1984 Dodge Ramcharg ... [0.00] 1997 Husaberg FC600 [0.00] 2015 Can-Am Outland ... [0.00] 2004 Ford F350 Supe ... [0.00] |
Coolant temp can be monitored by temporarily unlocking the feature on your dash, search is your friend
Torque app with a BT OBD2 adapter if you have an Android phone, custom PID's from DWR here:http://www.e90post.com/forums/showth...ght=TORQUE+pid If you have an iphone, Dashcommand is a decent app. You will need a Wifi OBD2 adapter. Not positive about EGT monitoring with this one, I'll check tonight and let you know Also, Carly for BMW which can do coding as well |
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07-09-2015, 08:25 AM | #17 |
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No sure about diesel but standard gasoline engines do not need a warm up prior to driving. Just start the car, give it a few seconds for the initial RPM surge to settle and drive MODERATELY; meaning keep the shifts between 3-3.5k RPMs. Do this till you reach proper operating temps. If you did a lot of spirited driving then again drive moderately the last mile or two so that the car can cool down a bit. Don't worry about the turbos too much because the water pump will keep cooling them even when you turn the car off.
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07-09-2015, 09:41 AM | #18 | |
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07-09-2015, 06:31 PM | #19 |
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Drives: 2010 BMW 335d
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Garage List 2010 BMW 335d [8.50]
2010 X5 35d [0.00] 2006 BMW 760i [0.00] 2002 BMW e39 540i S ... [0.00] 2014 BMW X5M [0.00] 1988 Pontiac GTA [0.00] 2005 KTM 950 Adventure [0.00] 2007 KTM 990 Adventure [0.00] 2012 BMW GS650GS Se ... [0.00] 2001 KTM 520EXC [0.00] 1989 Chevy IROC ASC ... [0.00] 1984 Dodge Ramcharg ... [0.00] 1997 Husaberg FC600 [0.00] 2015 Can-Am Outland ... [0.00] 2004 Ford F350 Supe ... [0.00] |
As Hooper stated no water to the turbos on the diesel
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07-09-2015, 10:13 PM | #20 | |
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2011 335d:Mostly stock for now
2007 BMW K1200s: PCIII |
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07-09-2015, 10:26 PM | #21 |
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Drives: 2010 BMW 335d
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Garage List 2010 BMW 335d [8.50]
2010 X5 35d [0.00] 2006 BMW 760i [0.00] 2002 BMW e39 540i S ... [0.00] 2014 BMW X5M [0.00] 1988 Pontiac GTA [0.00] 2005 KTM 950 Adventure [0.00] 2007 KTM 990 Adventure [0.00] 2012 BMW GS650GS Se ... [0.00] 2001 KTM 520EXC [0.00] 1989 Chevy IROC ASC ... [0.00] 1984 Dodge Ramcharg ... [0.00] 1997 Husaberg FC600 [0.00] 2015 Can-Am Outland ... [0.00] 2004 Ford F350 Supe ... [0.00] |
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