Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-11-2022, 09:05 AM
Member
 
Join Date: Jul 2013
Location: montreal
Posts: 210
Takimo is on a distinguished road
Extreme cold = low oil pressure ?

So today is -23C here in montreal, i made a valve cover job a few month ago so no more oil smell since then. but today after driving a few minute a burning oil smell came... then i went home and the car suddenly shut down, i restart it and it didnt start.. i then start and press gas at same time and it start... could it be oil pressure .. or it have something to do with extreme cold ? that make something go wrong with valve cover , then oil leak, and then low oil pressure ?


EDIT: before i did the valve cover job, everytime is around -20C the car would never start , i went threw this situation a few time.. (battery wasnt the problem)


i suspect the same situation happen today... oil leak + too cold = low pressure ?



it seem like when its too cold (-20C), something blow the valve cover valve and make it leak, does it make sense ?
__________________
BMW X5 3.0i 2006

Last edited by Takimo; 01-11-2022 at 10:14 AM.
Reply With Quote

Sponsored Links

  #2  
Old 01-11-2022, 10:50 AM
Premier Member
 
Join Date: Jan 2016
Location: Michigan
Posts: 397
ahlem is on a distinguished road
Could be your CCV system is involved. Have you done any maintenance there?
If you get the car to a warm garage does the situation change? Cold weather always seems to bring up issues that weren't issues when it was warmer.
I'd also check fuel pressure and vacuum leaks. Lots of o-rings and gaskets shrink or get more brittle when it's cold.
__________________
2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,
Reply With Quote
  #3  
Old 01-11-2022, 11:11 AM
Member
 
Join Date: Jul 2013
Location: montreal
Posts: 210
Takimo is on a distinguished road
-yeah i did the ccv during winter a couple year ago, and didnt notice any difference at the time between the before/after lol...


when i use to have valve cover oil leak , the car wouldnt start at -20C but if i wait couple days when its warmer around 0 it would start like a charm...


i dont have tool to check pressure, i guess i have to make a tour to a garage, i hope its not the valve cover gasket.. as i just did it during spring... but i guess the chance are here since i smell a burning smell ... only today since the repair
__________________
BMW X5 3.0i 2006
Reply With Quote
  #4  
Old 01-11-2022, 11:15 AM
Member
 
Join Date: Mar 2006
Location: Washington, DC
Posts: 744
nick325xit 5spd is on a distinguished road
If a car stops running due to low oil pressure, the engine is usually fucked at that point. So the short answer is if it restarted, I doubt low oil pressure is your issue.

It sounds like in extreme cold, you're running into gaskets failing and causing a vacuum leak. Which would cause the engine to die.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Reply With Quote
  #5  
Old 01-11-2022, 11:31 AM
Member
 
Join Date: Jul 2013
Location: montreal
Posts: 210
Takimo is on a distinguished road
Quote:
Originally Posted by nick325xit 5spd View Post
If a car stops running due to low oil pressure, the engine is usually fucked at that point. So the short answer is if it restarted, I doubt low oil pressure is your issue.

It sounds like in extreme cold, you're running into gaskets failing and causing a vacuum leak. Which would cause the engine to die.

something like that ...




it stall right when i made a turn to the driveway so i was halfway of the driveway, wouldnt restart untill i turn key and press gas at same time, drive a few inch turn the key off ASAP lol
__________________
BMW X5 3.0i 2006
Reply With Quote
  #6  
Old 01-11-2022, 11:55 AM
Member
 
Join Date: Mar 2006
Location: Washington, DC
Posts: 744
nick325xit 5spd is on a distinguished road
Quote:
Originally Posted by Takimo View Post
something like that ...




it stall right when i made a turn to the driveway so i was halfway of the driveway, wouldnt restart untill i turn key and press gas at same time, drive a few inch turn the key off ASAP lol
That's big vacuum leak behavior. Obviously not great, but more benign. I'd also investigate whether you have another vacuum leak. It's easy to check the intake elbow for cracks.

Low oil pressure behavior is spun rod bearings/seized engine and/or rods hanging out the side of the block. You might hear the lifters get noisy first.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Reply With Quote
  #7  
Old 01-11-2022, 12:06 PM
Member
 
Join Date: Jul 2013
Location: montreal
Posts: 210
Takimo is on a distinguished road
what funny its it start when i first leave home (i guess at that time to gasket didnt fail).... sound like... start in extreme cold = make valve gasket fail ( start of burning smell after few miles)... so it mean vacuum leak and then car stall and wont restart..
__________________
BMW X5 3.0i 2006
Reply With Quote
  #8  
Old 01-11-2022, 12:23 PM
Member
 
Join Date: Mar 2006
Location: Washington, DC
Posts: 744
nick325xit 5spd is on a distinguished road
Quote:
Originally Posted by Takimo View Post
what funny its it start when i first leave home (i guess at that time to gasket didnt fail).... sound like... start in extreme cold = make valve gasket fail ( start of burning smell after few miles)... so it mean vacuum leak and then car stall and wont restart..
When the car is cold, it runs in open loop mode. So the impact of a vacuum leak is much less.
__________________
2011 M3
2006 Sierra 2500HD 4WD LBZ/Allison
2004 X5 3.0i 6MT
1995 M3 S50B32
1990 325is
1989 M3 S54B32

Hers:
1989 325iX
1996 911 Turbo


Reply With Quote
  #9  
Old 01-11-2022, 01:39 PM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 3,830
EODguy is on a distinguished road
Check oil levels and unplug the MAF and see if you get any satisfaction on starting.

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #10  
Old 01-11-2022, 02:21 PM
Member
 
Join Date: Jul 2013
Location: montreal
Posts: 210
Takimo is on a distinguished road
pretty much sure oil level its lower then it was this morning since i smell burning oil...
__________________
BMW X5 3.0i 2006
Reply With Quote
Reply

Bookmarks

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 01:56 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.