Blue smoke coming out from my bmw 320d e46

Asked by Feb 23, 2016 at 01:39 PM about the 2003 BMW 3 Series

Question type: Maintenance & Repair

When I start the car quite a bit cloud of grayish
smoke comes out followed by blue smoke which
continues to come out. As soon as the enigne
warms up smoke disappears. I know it could be oil
being burned but could I Have all the possible
reasons please? Maybe its not oil at all? Also, once
someone told me that if you open the oil cap when
the car is running the oil should not spit. In this case
it does. But I have read a little but about it and
some poeple say it should spit (moving parts inside
it) and some people say it shouldnt (blowby gases).
Maybe it depends on the vehicle?

I would be greatful to receive some detailed answer.
Thank you!

5 Answers


Sounds like the valve guide seals may be leaking.


worn a compression test~ get a least new piston rings and hone~


Also a pcv acting up can sometimes cause blue smoke. That would be easier to check and repair if it's the issue.

1 out of 1 people think this is helpful.

there IS oil consumption? figured as much...when it heats up, due to expansion reduces the oil getting to where it shouldn't be~ OKAY, check the fluids...if the radiator fluid is low...suspect a cracked block...if it's OIL, like I say...may be time for an engine rebuild~


it should have at least 130,000 miles on it by's had a good long life already~ invest in some work...or get a new one~

Your Answer

Add photo

Related Questions

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 1,622 nationwide 3 Series listings starting at $1,499.

Postal Code:

Search BMW 3 Series Questions

BMW 3 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,280
#2 Robert Charlson
Robert Charlson
Reputation 1,440
#3 Michael Branan
Michael Branan
Reputation 1,150
View All

Related Models For Sale

Used BMW 5 Series
13 Great Deals out of 261 listings starting at $2,985
Used BMW M3
41 listings starting at $14,888
Used Mercedes-Benz C-Class
80 Great Deals out of 1,455 listings starting at $4,980
Used Audi A4
21 Great Deals out of 543 listings starting at $2,200
Used Ford Mustang
7 Great Deals out of 783 listings starting at $6,495
Used Honda Accord
73 Great Deals out of 876 listings starting at $1,888
Used Mercedes-Benz E-Class
49 Great Deals out of 465 listings starting at $1,999
Used BMW X5
8 Great Deals out of 448 listings starting at $2,900
Used BMW 6 Series
74 listings starting at $14,990
Used BMW 7 Series
6 Great Deals out of 74 listings starting at $5,995
Used Chevrolet Camaro
919 listings starting at $11,949
Used BMW 1 Series
4 Great Deals out of 96 listings starting at $8,555

Used Cars For Sale

2017 BMW 3 Series For Sale
284 listings starting at $44,637
2016 BMW 3 Series For Sale
43 Great Deals out of 125 listings starting at $29,900
2015 BMW 3 Series For Sale
41 listings starting at $28,500
2014 BMW 3 Series For Sale
4 Great Deals out of 82 listings starting at $20,991
2013 BMW 3 Series For Sale
46 Great Deals out of 334 listings starting at $17,995