Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > The Best of Bimmerfest! > BMW Diesel Owners / Enthusiasts

BMW Diesel Owners / Enthusiasts
Do you own a diesel powered BMW? Maybe a 335d or a BMW x35d? Come and talk about what makes your car great!

Reply
 
Thread Tools Display Modes
  #1  
Old 08-05-2012, 06:11 PM
finnbmw's Avatar
finnbmw finnbmw is offline
Officially Welcomed to the 'Fest
Location: Atlanta, GA
 
Join Date: Jul 2008
Posts: 833
Mein Auto: 2010 & 2012 X5 35d
What happens with urea during extended storage?

I recall reading somewhere that the urea we are using in our diesels will crystallize over time. Is this true? If so, wondering what will happen with the system if the car is left sitting for a prolonged period? Will the urea crystallize in the lines, filter etc. and cause damage when the engine starts back up?

Just curious...

Last edited by finnbmw; 08-05-2012 at 07:42 PM.
Reply With Quote
Ads by Google
  #2  
Old 08-06-2012, 12:02 AM
Snipe656 Snipe656 is offline
Officially Welcomed to the 'Fest
Location: Humble, Tx
 
Join Date: Oct 2009
Posts: 4,032
Mein Auto: 2009 335d
It has a shelf life of well over a year if I remember right. It does not crystallize due to age but instead seems to be because of temperatures. When too old it looses it's efficiency. Your fuel will probably get algae growth long before the DEF becomes an issue from sitting for prolonged periods of time. You'd still be talking about extremely long periods of time of sitting for the fuel to be a worry.
__________________
--Admiral Aaron Rouse
Reply With Quote
  #3  
Old 08-06-2012, 01:48 PM
BMWTurboDzl BMWTurboDzl is offline
Officially Welcomed to the 'Fest
Location: Atlanta
 
Join Date: Jul 2010
Posts: 1,102
Mein Auto: 335D
Evaporates and leavs crystal behind. IIRC 2 yr storage life so it should be a none issue.
__________________
Reply With Quote
  #4  
Old 08-06-2012, 10:46 PM
Snipe656 Snipe656 is offline
Officially Welcomed to the 'Fest
Location: Humble, Tx
 
Join Date: Oct 2009
Posts: 4,032
Mein Auto: 2009 335d
In my experience fuel normally gets growth in it before 2 years so that would be my bigger worry if I were to have any worries about sitting. I could not imagine though having such a new car and leaving it collecting dust for so long.
__________________
--Admiral Aaron Rouse
Reply With Quote
  #5  
Old 08-09-2012, 11:40 PM
bimmerdiesel's Avatar
bimmerdiesel bimmerdiesel is offline
Officially Welcomed to the 'Fest
Location: Bedford MA
 
Join Date: Jul 2010
Posts: 806
Mein Auto: 335d
I left my car in garage for 1 month and it started just fine and no issues. This was in Nov month with temps in 20-30F. And I am currently away for 7 weeks and left car in parking. Hopefully I will have no issues after these 7 weeks.
__________________

335d Black Sapphire/Biege/Premium/Sport/Cold/Nav/CA/PDC/iPod

Reply With Quote
  #6  
Old 08-09-2012, 11:44 PM
Snipe656 Snipe656 is offline
Officially Welcomed to the 'Fest
Location: Humble, Tx
 
Join Date: Oct 2009
Posts: 4,032
Mein Auto: 2009 335d
Quote:
Originally Posted by bimmerdiesel View Post
I left my car in garage for 1 month and it started just fine and no issues. This was in Nov month with temps in 20-30F. And I am currently away for 7 weeks and left car in parking. Hopefully I will have no issues after these 7 weeks.
My car has sat for months on end and I have had zero issues with DEF crystallizing. I of course do not live in a very cold environment either so take it for what it is worth. I am more worried about my battery holding enough charge through the long periods of sitting than anything else on the car.
__________________
--Admiral Aaron Rouse
Reply With Quote
  #7  
Old 08-10-2012, 08:11 AM
UncleJ UncleJ is offline
Officially Welcomed to the 'Fest
Location: Silicon Valley
 
Join Date: May 2006
Posts: 6,515
Mein Auto: '06 X3
I think I would worry about the car stored for a long period in a hot environment which would hasten the evaporation of the urea solution in the lines and perhaps cause crystallization and clog the smaller orifices in the system. The urea system is a fairly new and I suspect that we will have much to learn about it as the years pass.
Reply With Quote
  #8  
Old 08-10-2012, 08:14 AM
Snipe656 Snipe656 is offline
Officially Welcomed to the 'Fest
Location: Humble, Tx
 
Join Date: Oct 2009
Posts: 4,032
Mein Auto: 2009 335d
But what is a "long period" in days?
__________________
--Admiral Aaron Rouse
Reply With Quote
  #9  
Old 08-11-2012, 07:10 AM
UncleJ UncleJ is offline
Officially Welcomed to the 'Fest
Location: Silicon Valley
 
Join Date: May 2006
Posts: 6,515
Mein Auto: '06 X3
6 months would be a "long period" IMHO.
Reply With Quote
  #10  
Old 08-11-2012, 07:13 AM
ericwarren ericwarren is offline
Registered User
Location: Philly burbs
 
Join Date: Dec 2004
Posts: 36
Mein Auto: 2011:335d and Touareg TDI
My car was on the lot for about 18 months before I purchased it
Have put on about 700 miles and all seems ok.
Should I have it drained and refilled??
Reply With Quote
  #11  
Old 08-11-2012, 10:10 AM
UncleJ UncleJ is offline
Officially Welcomed to the 'Fest
Location: Silicon Valley
 
Join Date: May 2006
Posts: 6,515
Mein Auto: '06 X3
I doubt that it just sat in storage for 18 months. Almost certainly it was moved around the lot, if only to be washed, started frequently (to keep the battery up) and not shunted off into a dark corner to be forgotten.
Reply With Quote
  #12  
Old 08-11-2012, 10:45 AM
GreekboyD GreekboyD is offline
Officially Welcomed to the 'Fest
Location: Toronto
 
Join Date: Jan 2012
Posts: 520
Mein Auto: 2009 BMW 335d
Quote:
Originally Posted by ericwarren View Post
My car was on the lot for about 18 months before I purchased it
Have put on about 700 miles and all seems ok.
Should I have it drained and refilled??
Hard to say. I bought my 2009 BMW 335d with only 3,800 kms on it last August. About 2-3 days later I had the SES light come on and the SA said it was due to old urea sitting in the car and hadn't been changed for over two years. Fault code showed a clogged/hardened urea valve.

With 700 miles on yours though, I'd say you should be fine.
Reply With Quote
  #13  
Old 08-11-2012, 05:54 PM
ericwarren ericwarren is offline
Registered User
Location: Philly burbs
 
Join Date: Dec 2004
Posts: 36
Mein Auto: 2011:335d and Touareg TDI
i'll let the onboard computer be my guide then!
thanks.
e
Reply With Quote
  #14  
Old 08-11-2012, 11:05 PM
Snipe656 Snipe656 is offline
Officially Welcomed to the 'Fest
Location: Humble, Tx
 
Join Date: Oct 2009
Posts: 4,032
Mein Auto: 2009 335d
My car sat outside for almost a year prior to being purchased but that was in Texas so not like it saw much cold weather. Now one that sat outside in Canada for such a period or longer then I'd be wondering about the transfer pump.
__________________
--Admiral Aaron Rouse
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > The Best of Bimmerfest! > BMW Diesel Owners / Enthusiasts
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



Forum Jump


All times are GMT -7. The time now is 06:12 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms