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#1
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Extreme cold = 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 ?
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BMW X5 3.0i 2006 Last edited by Takimo; 01-11-2022 at 10:14 AM. |
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#2
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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.
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2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed, |
#3
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-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
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BMW X5 3.0i 2006 |
#4
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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.
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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 |
#5
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Quote:
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
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BMW X5 3.0i 2006 |
#6
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Quote:
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.
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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 |
#7
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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..
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BMW X5 3.0i 2006 |
#8
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When the car is cold, it runs in open loop mode. So the impact of a vacuum leak is much less.
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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 |
#9
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Check oil levels and unplug the MAF and see if you get any satisfaction on starting.
Sent from my SM-A730F using Tapatalk
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"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 |
#10
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pretty much sure oil level its lower then it was this morning since i smell burning oil...
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BMW X5 3.0i 2006 |
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