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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 01-17-2005, 09:25 AM   #1 (permalink)
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I have a 2001 525 with 60k miles on it. Recently upon starting the engine (though not every time) I get significant amounts of blue smoke out the exhaust. Occasionally upon acceleration from a standstill I get the blue smoke. There are no other symptoms except on occasion the yellow low oil light will come on. I check the oil and it is down about 1/8 inch from the full mark. This is my 5th BMW (third one bought new) and I have never seen or heard of this symptom. I have a 1985 3 series car that has 200k miles on it and have never experienced anything like this. I am concerned that it is serious.

Harvey

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Old 01-17-2005, 11:30 AM   #2 (permalink)
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200K miles ?Make sure the smoke is blue NOT white. Since Blue smoke=burning oil I suggest the head gasket to be replaced but NOT without performing a compression test. Also have a pro testing the radiator for the presence of carbon monoxide in the radiator, which may indicate the possibility of a cracked head.

note: bad valve guides and rings gives off blue smoke also.
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Old 01-18-2005, 06:34 AM   #3 (permalink)
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Quote:
Originally posted by hndshelton@Jan 17 2005, 09:25 AM
I have a 2001 525 with 60k miles on it. Recently upon starting the engine (though not every time) I get significant amounts of blue smoke out the exhaust. Occasionally upon acceleration from a standstill I get the blue smoke. There are no other symptoms except on occasion the yellow low oil light will come on. I check the oil and it is down about 1/8 inch from the full mark. This is my 5th BMW (third one bought new) and I have never seen or heard of this symptom. I have a 1985 3 series car that has 200k miles on it and have never experienced anything like this. I am concerned that it is serious.

Harvey

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I now have the car in the local dealer shop. Yesterday they indicated the problem was due to a cracked/split diaphram in the oil separator valve (which is much like a PCV valve). The shop indicated they have seen this previously, but not frequently.

Harvey
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