BimmerFest BMW Forum banner

1 - 15 of 15 Posts

·
Registered
Joined
·
21 Posts
Discussion Starter #1 (Edited)
I have white smoke that comes from my tail pipes after it sits at idle for a little while(ex. like at a drive-thru or red light). There isn't any visible oil leaking from anywhere that either I nor two other mechanics know of. Could it be the oil separator valve, pcv valve, head gaskets, etc? Is it possibly just water? Usually I can give it a couple of revs and it'll go away. I also can hear a slight rattle/knocking sound. But I only have heard this once and that was today. Thanks for you help and please share your experiences.
 

·
Registered
Joined
·
833 Posts
I have white smoke that comes from my tail pipes after it sits at idle for a little while(ex. like at a drive-thru or red light). There isn't any visible oil leaking from anywhere that either I nor two other mechanics know of. Could it be the oil separator valve, pcv valve, head gaskets, etc? Is it possibly just water? Usually I can give it a couple of revs and it'll go away. I also can hear a slight rattle/knocking sound. But I only have heard this once and that was today. Thanks for you help and please share your experiences.
Likely the "infamous" valve stem seal failure.
 

·
Registered
Joined
·
21 Posts
Discussion Starter #5
I had that issue changed my crank case vent on both banks and car is better
So should I just change the CCV valves? Is this what you're referring to? I have looked on rockauto.com and they sell the CCV valve in the quantity of one. I'm assuming I have to buy two for both sides of the engine? Thanks!
 

·
Registered
Joined
·
833 Posts
Any videos you know of that show how to do this myself? I can use rock auto to get the valve stems.
Check Youtube. You will need a special tool that locks the camshafts in place and then you will have to compress the springs, remove them and replace the seals. From what I understand it's not an easy job, that's why it's not cheap if you take it to a mechanic.
 

·
Registered
Joined
·
833 Posts
So should I just change the CCV valves? Is this what you're referring to? I have looked on rockauto.com and they sell the CCV valve in the quantity of one. I'm assuming I have to buy two for both sides of the engine? Thanks!
I doubt it's your CCV. A bad CCV causes random smoking. the smoking you describe is classic for failing valve stem seals.
 

·
Registered
Joined
·
76 Posts
Yes CCV one for each bank. Cheap easy change I would do before anything else. It made a big improvement in my smoking after prolong idealing in traffic. Good luck
 

·
Registered
Joined
·
68 Posts
I have white smoke that comes from my tail pipes after it sits at idle for a little while(ex. like at a drive-thru or red light). There isn't any visible oil leaking from anywhere that either I nor two other mechanics know of. Could it be the oil separator valve, pcv valve, head gaskets, etc? Is it possibly just water? Usually I can give it a couple of revs and it'll go away. I also can hear a slight rattle/knocking sound. But I only have heard this once and that was today. Thanks for you help and please share your experiences.
Crazy, but exact same issue occurred to me. White smoke would come out of the tail pipe anytime I would turn on the car after it had been sitting for a prolonged time. For example, overnight or few days. When I took it to the dealer, they said an oil supply line in the turbo was leaking/broken. They fixed it. This was 1.5 years ago, and now it is happening again. Same issue. Typical crooks these dealerships. In doing some google searching, this is a common problem. Luckily last time I had an extended warranty but the cost was $1700!

Anyone know how much it costs to repair/replace these lines at an indep shop? Does it require replacing the entire turbo to actually fix it rather than put a band aid on it??
 

·
Registered
Joined
·
21 Posts
Discussion Starter #10
Update.

I took it to the dealer I originally purchased the vehicle from just a month ago and they agreed to replace the crankcase ventilation system which they say I needed and was something that they were suppose to "get around to doing" before I purchased the vehicle. So hopefully this will fix the problem. I was also told by an independent shop owner I've taken it too for my suspension problems that I need 5w-40 oil not 5w-30 because 5w-30 is too thin.
 

·
Registered
Joined
·
833 Posts
I took it to the dealer I originally purchased the vehicle from just a month ago and they agreed to replace the crankcase ventilation system which they say I needed and was something that they were suppose to "get around to doing" before I purchased the vehicle. So hopefully this will fix the problem. I was also told by an independent shop owner I've taken it too for my suspension problems that I need 5w-40 oil not 5w-30 because 5w-30 is too thin.
5W-30 is what BMW specs, but as these trucks get older and the engines get high miles heavier oil helps. Changing from 5W-30 to 5W-40 certainly helped cut my oil consumption.
 

·
Registered
Joined
·
21 Posts
Discussion Starter #12
5W-30 is what BMW specs, but as these trucks get older and the engines get high miles heavier oil helps. Changing from 5W-30 to 5W-40 certainly helped cut my oil consumption.
Yea that makes since. They also use the Penray additive as well to help with any smoking issues.
 

·
Registered
Joined
·
68 Posts
Crazy, but exact same issue occurred to me. White smoke would come out of the tail pipe anytime I would turn on the car after it had been sitting for a prolonged time. For example, overnight or few days. When I took it to the dealer, they said an oil supply line in the turbo was leaking/broken. They fixed it. This was 1.5 years ago, and now it is happening again. Same issue. Typical crooks these dealerships. In doing some google searching, this is a common problem. Luckily last time I had an extended warranty but the cost was $1700!

Anyone know how much it costs to repair/replace these lines at an indep shop? Does it require replacing the entire turbo to actually fix it rather than put a band aid on it??
As an update to this situation, the mechanic felt it was a leaking turbo. The other thought was the valve stem seals, but they said to try the turbo first. Luckily that did the trick, and after $2500, it has stopped.
 
1 - 15 of 15 Posts
Top