Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 6 Series

6 Series
The BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

Reply
 
Thread Tools Display Modes
  #1  
Old 04-27-2013, 10:41 AM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
White smoke after idle

For some reason the past 2 weeks I've been getting white smoke from my exhaust pipes when I let the car idle standing still for about 4 minutes or more in park or drive. It happens when I push the gas the first time after the idle session. When it drives it's fine I see nothing.
Only happens after a few minutes of idling I have cycled the fuel put in additives but still smoke. I have a little bit of surging and a tad of rough idle at times.
I am thinking it might be my CAM sensors but not really sure if they would produce smoke.
I have no service engine soon lights or codes. Seems as if when idling something accumulates somewhere then gets burned off after a few throttle pumps.
Any ideas????

Thanks team!!!
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
Ads by Google
  #2  
Old 04-27-2013, 01:14 PM
HerbP HerbP is offline
Officially Welcomed to the 'Fest
Location: Georgia
 
Join Date: Jul 2009
Posts: 2,541
Mein Auto: 2005 645Ci & 2007 750Li
If your CCV valves have not been changed, it might be time to change them. If they have been changed, it sounds like your valve seals might be starting to fail. There are lots of threads on the 7 series forum, discussing valve seal failures.
Reply With Quote
  #3  
Old 04-27-2013, 01:45 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
White smoke after idle

Quote:
Originally Posted by HerbP View Post
If your CCV valves have not been changed, it might be time to change them. If they have been changed, it sounds like your valve seals might be starting to fail. There are lots of threads on the 7 series forum, discussing valve seal failures.
Hi Herb I have changed the CCV's a few months ago. As for the valve seals when they start going out you usually will see a white bluish smoke at first start of the day. Mine doesn't do that it never smokes only after the short stand still ..


Sent from BimmerApp mobile app
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #4  
Old 04-27-2013, 01:59 PM
HerbP HerbP is offline
Officially Welcomed to the 'Fest
Location: Georgia
 
Join Date: Jul 2009
Posts: 2,541
Mein Auto: 2005 645Ci & 2007 750Li
The only other thing could be would be antifreeze entering the combustion chamber from a possible bad head gasket. Are you losing any coolant from the system?
Reply With Quote
  #5  
Old 05-03-2013, 09:17 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
Quote:
Originally Posted by HerbP View Post
The only other thing could be would be antifreeze entering the combustion chamber from a possible bad head gasket. Are you losing any coolant from the system?
im not losing any antifreeze. Still can't find the cause.
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #6  
Old 05-11-2013, 01:15 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
Quote:
Originally Posted by HerbP View Post
The only other thing could be would be antifreeze entering the combustion chamber from a possible bad head gasket. Are you losing any coolant from the system?

Hi Herb I am not losing any coolant from my system. It's very weird only does it when it stands at idle for a maybe 5 minutes or more then after the first puff blows away its fine again no more smoke till it sits again. Stopping at traffic lights it's fine never smokes, I even just had it smog/emission tested and they passed it fine. Only level that was a little high in the report was HydroCarbons. Still hunting, I don't think it's the valve seals as they would smoke much more and more often.
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #7  
Old 05-11-2013, 06:08 PM
rebel.ranter rebel.ranter is offline
Officially Welcomed to the 'Fest
Location: Cork, Ireland
 
Join Date: Jul 2007
Posts: 454
Mein Auto: 630i, 525i, 320iC
Oh oh! That sounds like bad valve stem seals to me. Seen it on a 735i & that was the cause, also have a read of RusheyIRL's thread about his issue with white smoke at idle.

What does the smoke smell like after a while idling? Is it a choking smell like burning oil?
Reply With Quote
  #8  
Old 05-11-2013, 06:40 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
White smoke after idle

Quote:
Originally Posted by rebel.ranter View Post
Oh oh! That sounds like bad valve stem seals to me. Seen it on a 735i & that was the cause, also have a read of RusheyIRL's thread about his issue with white smoke at idle.

What does the smoke smell like after a while idling? Is it a choking smell like burning oil?
I know the smell your talking about but it's not the burning oil smell! Also oil will burn blueish not white the smell is hard to describe.


Sent from BimmerApp mobile app
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #9  
Old 05-12-2013, 12:35 AM
rebel.ranter rebel.ranter is offline
Officially Welcomed to the 'Fest
Location: Cork, Ireland
 
Join Date: Jul 2007
Posts: 454
Mein Auto: 630i, 525i, 320iC
Quote:
Originally Posted by Nitrogen View Post
I know the smell your talking about but it's not the burning oil smell! Also oil will burn blueish not white the smell is hard to describe.


Sent from BimmerApp mobile app
With the valve seals gone the oil will burn white, have a look at this video:



or this one:



or this:



finally this:

Reply With Quote
  #10  
Old 05-12-2013, 11:23 AM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
Quote:
Originally Posted by rebel.ranter View Post
With the valve seals gone the oil will burn white, have a look at this video:



or this one:



or this:



finally this:


Hi Rebel thanks for the info, man that doesn't look good. I might have the same problem after watching that. I wonder if I should sell the car my valve covers are leaking too. Pain in the butt don't know if I should keep it and fix stuff or just get rid of it and start over. It has 131K miles on it and I think things will just get worst from here as far as repairs are concerned. Although I do all my own repairs on the car.
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #11  
Old 05-12-2013, 11:51 AM
dolfan13's Avatar
dolfan13 dolfan13 is offline
Officially Welcomed to the 'Fest
Location: lexington,ky usa
 
Join Date: Jan 2011
Posts: 823
Mein Auto: 545i
In this situation the oil is coming out white because its being sucked in the exhaust valve.Oil is not being burnt in the combustion but rather by the cats and exhaust manifold.Suck in exhaust stroke pushed out with exhaust.Thats why its white,not burning hot enough to turn blue.
Reply With Quote
  #12  
Old 05-13-2013, 01:14 PM
snapdapro snapdapro is offline
650I Rolln
Location: San Diego
 
Join Date: Nov 2012
Posts: 49
Mein Auto: 650i convertible
this is something that happens with 650i. I JUST had 8k work done to mine and luckily I purchased the warranty and it was cover. your valve covers are bad and its leaking oil. i can forward you the invoice if you want to see all bmw el cajon fixed. took about 2 weeks, but depends on there workload.
__________________
me and my girlfriend...SUGA
Reply With Quote
  #13  
Old 05-13-2013, 01:18 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
White smoke after idle

Quote:
Originally Posted by snapdapro View Post
this is something that happens with 650i. I JUST had 8k work done to mine and luckily I purchased the warranty and it was cover. your valve covers are bad and its leaking oil. i can forward you the invoice if you want to see all bmw el cajon fixed. took about 2 weeks, but depends on there workload.
If I had to pay 8k I would buy another car to drive around with and do the work on my 6er myself and take my time .
I have no warranty my car has 131k miles no company will give me a warranty!!!


Sent from BimmerApp mobile app
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #14  
Old 05-13-2013, 03:38 PM
HerbP HerbP is offline
Officially Welcomed to the 'Fest
Location: Georgia
 
Join Date: Jul 2009
Posts: 2,541
Mein Auto: 2005 645Ci & 2007 750Li
If you are willing to do the work, I would go ahead & pull the motor. The valve seals can be replaced with the engine in the car, but it is probably a long 20 to 30 hours of pure aggravation. If you pull the heads, I think that you will need a special timing jig for reassembly? There is a thread on the 7 Series forum by Keif, that explains the repair.

A used motor might be found for 4 to 5k, but at that price I would build my own! The only damage that you can do by driving it as is, is possible damage to the cats. If you can make a trade without taking a beating, now would be the time to do it. Monitor the engine to see when it smoke the least, & take it to trade when it smokes the least.

Good Luck!
Reply With Quote
  #15  
Old 05-13-2013, 09:24 PM
ferny ferny is offline
Registered User
Location: Chicago
 
Join Date: Mar 2013
Posts: 87
Mein Auto: 06' BMW 650i
The Warranty Group and CARCHEX will cover your car with those miles I believe. Call them and ask.
__________________
// 06 650i, aFe Intake, M310 Avant Garde Wheels
// M Driving School
Reply With Quote
  #16  
Old 05-14-2013, 05:38 AM
pablo645's Avatar
pablo645 pablo645 is offline
Officially Welcomed to the 'Fest
Location: NY
 
Join Date: Feb 2009
Posts: 1,891
Mein Auto: 650i Convertible
Sorry to hear about your problems Nitrogen. It seems you love your ride and would like to keep it. I would suggest you try and repair it because a trade would kill you on the value with that problem. I figured you would lose just as much on the lost value, maybe even more, on a trade that you could use to fix the car. The cost of the seals are not that bad it's the labor cost that is going to be the problem. If you have a garage and handy with tools, you can pull it off yourself. Like others have said, it will take time but you can do it if you have the time to spare. And another good thing is you can replace all that you think needs replacing while you have it apart. Then you don't have to worry about certain issues for another 100K miles!
__________________
2012 650-xDrive Convertible. Titanium Silver Metallic - M Package - Driver assist package- Cold weather package - luxury seating package - Bang & Oulfsen system.

Previous Cars:
2008 650 Convertible 6 speed manual
2004 645 Convertible 6 speed manual
1994 540 6 speed manual
Reply With Quote
  #17  
Old 07-01-2014, 11:37 AM
GoGo98102 GoGo98102 is offline
Registered User
Location: Seattle
 
Join Date: Jun 2007
Posts: 1
Mein Auto: 06' 650i
I know this is an old thread but I bet people are still searching for info...

I had the exact same problem. Only smoke after a long idle but not first thing in the morning (typical symptoms of a leaking vale stem seals). BMW didn't know for sure what's wrong and quoted me an $8000 fix anyway. After googling and doing a lot of research, I found out that if you changed your oil to higher (5w 30 to 10w 40), it would stop oil from leaking into the engine. Because my car (06' 650i) can take up to 10w 60, I went to my BMW dealer and bought a case of them. Now 200 miles later, I have yet to see any smoke.

Obviously this is just a patch, not an $8000 fix but I can live with it.
__________________
06' 650i Coupe/Sports/Cold Weather/Premium Sound/Head Up
03' 325i
98' 540i
92' 318i Convertible
Reply With Quote
  #18  
Old 07-01-2014, 04:32 PM
coug60's Avatar
coug60 coug60 is offline
06 BMW 650i Sprt/Prem Pkg
Location: Nothern California - Bay Area
 
Join Date: Jun 2009
Posts: 944
Mein Auto: 2006 BMW 650i e64
Quote:
Originally Posted by GoGo98102 View Post
I know this is an old thread but I bet people are still searching for info...

I had the exact same problem. Only smoke after a long idle but not first thing in the morning (typical symptoms of a leaking vale stem seals). BMW didn't know for sure what's wrong and quoted me an $8000 fix anyway. After googling and doing a lot of research, I found out that if you changed your oil to higher (5w 30 to 10w 40), it would stop oil from leaking into the engine. Because my car (06' 650i) can take up to 10w 60, I went to my BMW dealer and bought a case of them. Now 200 miles later, I have yet to see any smoke.

Obviously this is just a patch, not an $8000 fix but I can live with it.
Like GoGo said you might try a heavier oil as a temp fix. It might last a while but when that fails it will grenade quickly.
If all this is actually $8k to fix you might look into a new rebuilt engine (I have no idea what one would cost) or if your mechanically inclined pull the engine and rebuild the top half yourself and then you would be good to go for sometime.
__________________

2006 BMW 650i Sport/Premium Package
+ Various Mods & Upgrades
Reply With Quote
  #19  
Old 07-02-2014, 02:37 PM
bmwoem1 bmwoem1 is online now
Regional Sponsor
Location: New York
 
Join Date: Jan 2013
Posts: 594
Mein Auto: X3
White smoke after idle

Or you can get the valve stem seal job done for $2500 (for those closer to the northeast).... Check out my threads


Sent from BimmerApp mobile app
Reply With Quote
  #20  
Old 07-07-2014, 04:44 PM
Bk650's Avatar
Bk650 Bk650 is offline
Nerdy G
Location: Brookyln
 
Join Date: Aug 2009
Posts: 867
Send a message via AIM to Bk650
Mein Auto: 650i
Quote:
Originally Posted by bmwoem1 View Post
Or you can get the valve stem seal job done for $2500 (for those closer to the northeast).... Check out my threads


Sent from BimmerApp mobile app
I can vouch for BMWOEM1 he did mine and saved me tons of money..
__________________
Greg A

650i on 22's Asanti, mtec v3 angel eyes, Custom exhaust...


2000 GS300 heavily modded gone but never forgotten
1998 LS400 Daily driver
2005 Range Rover HSE (family car) Lost in Divorce
Reply With Quote
  #21  
Old 07-30-2014, 10:48 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
Wow I changed my oil to 5-40 and no more smoke as well. Thanks for the easy fix. We will see how long it lasts but I think it will be good for a long time. If it doesn't just keep going with thicker oil.
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
  #22  
Old 07-31-2014, 06:45 PM
HerbP HerbP is offline
Officially Welcomed to the 'Fest
Location: Georgia
 
Join Date: Jul 2009
Posts: 2,541
Mein Auto: 2005 645Ci & 2007 750Li
It's hard to believe that going from 0w40 to 5w40, would make that big a difference? Good to know, we might all need it one day!
Reply With Quote
  #23  
Old 08-04-2014, 03:22 PM
Nitrogen's Avatar
Nitrogen Nitrogen is offline
Officially Welcomed to the 'Fest
Location: Central California
 
Join Date: Apr 2012
Posts: 427
Mein Auto: BMW 650i Convertible
Quote:
Originally Posted by HerbP View Post
It's hard to believe that going from 0w40 to 5w40, would make that big a difference? Good to know, we might all need it one day!

Ok so to recap, I did further testing and it still smokes. But it takes a really long time.
Before I would go through a car wash and at the end it would smoke like crazy. Also on long waits at traffic lights.
So Herb you are correct! But it is much better now it takes about 25minutes on idle to do anything. Which to me is no big deal if it gets worst again I will go thicker and thicker till it blows up LOL...
__________________
Sent Via iPhone using BimmerApp
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 6 Series
Today's Posts Search
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 On



Forum Jump


All times are GMT -7. The time now is 03:17 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms