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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 12-05-2004, 09:23 AM   #1 (permalink)
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Hi. I have a 1997 528i with 100,000 miles on it. lately I have noticed a smoky burning smell coming through my vents inside the car when I use the heater. It does not come through when I am using the a/c. The other day while waiting in line at the bank I could even see a little smoke coming from the vents. It seems to go away as fast as it comes. Anybody have any idea what this could be? I also notice my Trans shifts hard when car is cold. Thanks.
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Old 12-05-2004, 11:31 AM   #2 (permalink)
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Sounds like oil leak? hitting exhaust manifold somewhere. Check for oil leaks. As to the tranny rough shifting when cold? To minimize it: when warming up I usually engage it in drive while holding breaks for several minutes to allow full circulation of fluid. It works; just make sure it has the proper amount of fluid. NOTE: NO dipstick!!

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Old 12-06-2004, 05:39 AM   #3 (permalink)
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Originally posted by billB@Dec 5 2004, 01:31 PM
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Sounds like oil leak? hitting exhaust manifold somewhere. Check for oil leaks. As to the tranny rough shifting when cold? To minimize it: when warming up I usually engage it in drive while holding breaks for several minutes to allow full circulation of fluid. It works; just make sure it has the proper amount of fluid. NOTE: NO dipstick!!

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Thank You Bill.
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Old 12-06-2004, 07:52 AM   #4 (permalink)
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i doubt its an oil leak, sounds like your heater core would need to be replaced.
check with a dealer, but i think thats what it is. what does it smell like?

good luck
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Old 12-06-2004, 07:59 AM   #5 (permalink)
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Originally posted by ///M Dream@Dec 6 2004, 09:52 AM
i doubt its an oil leak, sounds like your heater core would need to be replaced.
check with a dealer, but i think thats what it is. what does it smell like?

good luck
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It smeels like some type of lubericant or oil. It doesn't smell like engine oil burning. I also get a faint smell of anti freeze when I first fire up the heater.Thanks for the help.
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Old 12-06-2004, 08:02 AM   #6 (permalink)
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its a leaky heater core, what you smell is the antifreeze leaking out and into the innterior of your car
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Old 12-06-2004, 08:05 AM   #7 (permalink)
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Originally posted by ///M Dream@Dec 6 2004, 10:02 AM
its a leaky heater core, what you smell is the antifreeze leaking out and into the innterior of your car
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What would be the burning smell? I can't figure that one out.
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Old 12-06-2004, 08:11 AM   #8 (permalink)
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what burning smell? is there a smell other than the antifreeze?
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Old 12-06-2004, 08:23 AM   #9 (permalink)
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Originally posted by ///M Dream@Dec 6 2004, 10:11 AM
what burning smell? is there a smell other than the antifreeze?
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The burnig smells like some kind of oil. I even saw smoke coming threw the vents.
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Old 12-06-2004, 08:25 AM   #10 (permalink)
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that smoke coming out is the antifreeze, its one of the warning signs that the heater core is out. also, there might be some fog on the windshield and/or antifreeze on the passenger side floor.
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Old 12-06-2004, 10:47 AM   #11 (permalink)
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Quote:
Originally posted by fdeee@Dec 5 2004, 04:23 PM
Hi. I have a 1997 528i with 100,000 miles on it. lately I have noticed a smoky burning smell coming through my vents inside the car when I use the heater. It does not come through when I am using the a/c. The other day while waiting in line at the bank I could even see a little smoke coming from the vents. It seems to go away as fast as it comes. Anybody have any idea what this could be? I also notice my Trans shifts hard when car is cold. Thanks.
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Burning smell is burning smell......Foggy winshield, oily winshield, fog through vents is NOT burning oil. The latter symptoms are related to heater core. Which one is it?

CHECK the post coolant smell.....posted by "numberthree"
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Old 12-06-2004, 10:53 AM   #12 (permalink)
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Originally posted by billB+Dec 6 2004, 12:47 PM--><div class='quotetop'>QUOTE(billB @ Dec 6 2004, 12:47 PM)</div><div class='quotemain'><!--QuoteBegin-fdeee@Dec 5 2004, 04:23 PM
Hi. I have a 1997 528i with 100,000 miles on it. lately I have noticed a smoky burning smell coming through my vents inside the car when I use the heater. It does not come through when I am using the a/c. The other day while waiting in line at the bank I could even see a little smoke coming from the vents. It seems to go away as fast as it comes. Anybody have any idea what this could be? I also notice my Trans shifts hard when car is cold. Thanks.
[snapback]243810[/snapback]
Burning smell is burning smell......Foggy winshield, oily winshield, fog through vents is NOT burning oil. The latter symptoms are related to heater core. Which one is it?
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[/b][/quote]Bill. I have to say it is smokey smell it is not anti freeze. That said I also have the slight smell of anti freeze when I turn on the heater but they are two diffirent smells.
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Old 12-06-2004, 10:57 AM   #13 (permalink)
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Two things:
A. open the hood and take a look at everything and anything.....Smoke? smell?
B. Does your winshield gets GREASY,OILY foggy?
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Old 12-06-2004, 11:51 AM   #14 (permalink)
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Originally posted by billB@Dec 6 2004, 12:57 PM
Two things:
A. open the hood and take a look at everything and anything.....Smoke? smell?
B. Does your winshield gets GREASY,OILY foggy?
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Bill I had BMW check the engine for leaks and they found nothing. The Service Advisor said it could be the electric motor burning out but I don't think so. Its the damndest thing. Could it be power steering fluid or trans fluid burning?
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