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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 03-20-2013, 04:29 PM
FUKJDM FUKJDM is offline
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For those who have replaced the valve seals..

I have a local shop that is going to do the job for me but has informed me that they have seen that those that have replaced these seals, usually have the same problem again after 2 years. My question to you guys is, if you have replaced the valve seals, have you had the issue come back? I know my other option is to trade in, just not too sure if i want to trade her in yet...
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  #2  
Old 03-20-2013, 05:13 PM
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Wallace754 Wallace754 is offline
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I had them done and the sensors and it is not as bad, but if the car sits idle for a while, the smoke comes back.
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Old 03-20-2013, 07:52 PM
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Had mine done this past October (covered under warranty) at the dealership. I have not heard of such a thing but with the history that is easily found here on such a problem I am sure quite a few of the members will chime in. I will have to review with my auto tech. Good Luck with your repairs.
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  #4  
Old 03-20-2013, 08:06 PM
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Rookie2008 Rookie2008 is offline
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Quote:
Originally Posted by oktane98 View Post
Had mine done this past October (covered under warranty) at the dealership. I have not heard of such a thing but with the history that is easily found here on such a problem I am sure quite a few of the members will chime in. I will have to review with my auto tech. Good Luck with your repairs.
Just curious being that you have a 750, how many miles did you have on your car when this happened?
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  #5  
Old 03-20-2013, 08:07 PM
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Quote:
Originally Posted by Wallace754 View Post
I had them done and the sensors and it is not as bad, but if the car sits idle for a while, the smoke comes back.
On your current 750 or the 745 you had?
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  #6  
Old 03-20-2013, 08:33 PM
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745iguy 745iguy is offline
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Perhaps the techs at bmw of newport were right, and all e65/6 are alike and prone to the same problems, they just haven't hit the mileage to have the problems yet.
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Last edited by 745iguy; 03-20-2013 at 08:34 PM.
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  #7  
Old 03-20-2013, 09:22 PM
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Wallace754 Wallace754 is offline
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750. The 745 didn't have that problem. Or just not before I traded it in.
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  #8  
Old 03-20-2013, 09:26 PM
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Quote:
Originally Posted by 745iguy View Post
Perhaps the techs at bmw of newport were right, and all e65/6 are alike and prone to the same problems, they just haven't hit the mileage to have the problems yet.
Same thing my trusty Indy said. It is the nature of the beast.
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  #9  
Old 03-22-2013, 06:14 AM
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If new seals only lasted a short time (i.e. two years) then I would be suspect that the valve guides were worn past tolerance of 0.5mm total movement from side to side of valve stem tip.
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  #10  
Old 03-22-2013, 06:25 PM
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Originally Posted by Rookie2008 View Post
Just curious being that you have a 750, how many miles did you have on your car when this happened?
I had just hit 92K and the only way I found out was that I was making a video clip for the guys on FB "e65/e66". I saw the trail of blue smoke. Seriously considered trading her on an Audi S8 I saw listed. Dealer took 2.5 weeks to repair. (I had them do other things since the engine bay was so open) Well $8K in covered warranty work later she rides and hums like new. I was reading a thread here the other day and it is true, when we have these known problems we are ready to throw the towel in but, once repaired each and every one of us to a fault will demand that our BMW's be looked at as the best autos ever made. They (7's) are second to none.
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  #11  
Old 03-22-2013, 09:30 PM
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Quote:
Originally Posted by Davidf View Post
If new seals only lasted a short time (i.e. two years) then I would be suspect that the valve guides were worn past tolerance of 0.5mm total movement from side to side of valve stem tip.
I'm going to mention this. I was without smoke for a couple of weeks. Then it was back. It is not as bad as before. But it is still there. I get a lil nervous when I have to idle for a while.
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  #12  
Old 03-22-2013, 09:36 PM
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That really sucks... Will you fix it again or learn to live with it?
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  #13  
Old 03-22-2013, 09:51 PM
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Had mine done few months Ago. No issues so far plus I have warranty on my service for 3 yrs
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  #14  
Old 03-25-2013, 10:50 AM
FUKJDM FUKJDM is offline
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Good to hear, mines not as bad as ive heard others have experienced so hopefully that means the guides havent been damaged. Ill be taking her next week... Thanks for the replies.
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  #15  
Old 03-25-2013, 11:02 PM
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Quote:
Originally Posted by Rookie2008 View Post
That really sucks... Will you fix it again or learn to live with it?
I'm not sure. I haven't decided yet. It's a stupid problem to have especially since I had it all worked in, but its still a problem regardless.
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  #16  
Old 03-26-2013, 05:31 AM
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I have 25k on new valve seals replaced at 90k.I am also running a cooler thermostat as of 1k ago.These n62 engines run at 105c which is in my opinion shortening all seal life.I modded the stock tstat to run 95c.Going to do a UOA at 4k after mod to check for unusual wear.Ive also been changing oil at 5k since new seals with 0w30 GC.
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  #17  
Old 03-26-2013, 07:11 AM
jkess114 jkess114 is offline
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What mileage are y'all at? I am at 104k and don't have any smoke coming from the car. . .
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  #18  
Old 03-26-2013, 08:58 AM
FUKJDM FUKJDM is offline
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I'm at 120k, the "smoke" isnt consist on my car but it does happen here and there which is odd.

Last edited by FUKJDM; 03-26-2013 at 09:04 AM.
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  #19  
Old 03-26-2013, 09:13 AM
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Maybe mine were done previously? Im at 148k miles now and the only time i see smoke is in the cold weather and its not a cloud of smoke like people are saying here (magic show, ultimate smoking machine etc); as it warms up outside nothing at all.
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  #20  
Old 03-27-2013, 06:00 AM
Davidf Davidf is offline
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Mine is smoking at 215k miles. Have plugged secondary air ports as well. Going to purchase the AGA kit to clean the ports, replace the air port valves and then tackle the valve seals. Not looking forward to projects. Doing the port cleaning attempt first, because if it fails, the head comes off and then valve stem seals are easy.

Edit: Crud, I always forget which forum I am on...this is for my E60 545i (same engine).

Last edited by Davidf; 03-27-2013 at 06:03 AM.
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  #21  
Old 03-27-2013, 10:41 AM
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Mine starting smoking at 60k miles. I have learnedd to live with it, but I ain't happy about it. Be tween that, the weep hole issue and the secondary air system failures, I am seriously pissed, but just love how the car drives and feels. It's like being married to a super model.......sex is great, she looks great under your arm, but the drama and high maintenance are almost a deal breaker! Ugh.
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  #22  
Old 04-09-2013, 01:09 AM
EzBusiness EzBusiness is offline
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Relaced Valve Seals and CCVV and still Smoking

Hello eveyone

2002 745Li
170000 miles

My problems started about 6 months ago. I heard a whistling at idle and I was told it was the CCV, so i changed them and the whistle went away. But my other problems began. I began to notice a sudden use of oil that I did not have before. I was now using about 11/2 quarts every 1000 miles when I didnt use any before changing the CCVV.

I searched through the forum and found that everyone immediately said it was the Valve Stem Seals. I didn't think it was he seals because everytime I let the engine iddle for a ten minute period of time and tried getting it to smoke, it would only smoke 1 in 3 times. I figured it couldn't be the seals because once they are worn or cracked they don't fix themselves. I continued to loo for other possible options but I couldn't find any so I continued to check my engine. I noticed that my intake manifold had oil residue inside of it and there should not be any oil there. Since I couldn't find any help figuring out where the oil was coming from I decided to change the Valve Stem Seals, I had them changed and got the car back together and you guessed it, still smokes on and off.

I still think that the problem is that the oil is going from the valve covers to the intake manifold because of the excessive vacuum at idle. So today I turned the car on cold and pulled the dipstick and oil filler cap and to my amasement the vacuum was normal. So i figured it must have been a connector or hose that I had just rechecked to make sure they were tight but I guess I am not so lucky. After the car warmed up andI removed the dipstick and then the oil filler cap the excessive vacuum was back.

This is what I need help figuring out, why do I have such high vacuum in the engine and why is my oil going from the valve covers to the intake manifold? The car runs perfect except for the smoke and oil consumption. Remember

Things already replaced
CCVV
Valve Stem Seals
All Vacuum lines

Symtoms
Vacuum normal when cold excessive when hot.
Oil in the intake manifold
Smokes at idle sometimes and uses 11/2 quarts of oil every 1000 miles. All this began when I changed my CCVV never used oil before I changed them.

Plase help, I am at my witts end. I am thinking about just parting the car out if I can fix it. I can't find myself selling the car to someone and handing over my nightmare in goog concious.

Thanks
EzBusiness
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  #23  
Old 04-09-2013, 05:54 AM
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Rookie2008 Rookie2008 is offline
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Wats up bro! My answer would be the same as David on post 9. Valve guides are worn. Best of luck.
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  #24  
Old 04-09-2013, 01:43 PM
EzBusiness EzBusiness is offline
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Thanks Rookie for your response.

I thought the same thing but since I got seals installed the car never stopped smoking. Normally if you have bad valve guides when you put new seals it stops smoking for sometime before it begins smoking again.

The other thing is why would it smoke only sometimes, and the smoke only began when i changed the CCVV.

I think it has something to do with the excessive vacuum, because there should not be any oil in the intake manifold. I just don't have any idea of what causes excessive vacuum in the engine. Excessive vacuum only happens when the car is hot not when it first starts. So i would think it has to do with a sensor or valve because one second it's normal the next it's high vacuum.

Best Regards,
EzBusiness
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  #25  
Old 09-06-2013, 08:05 PM
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Hogie Hogie is offline
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The oil passing into the intake and the valve stem seals on higher mileage N62s is common and my N62 developed the smoke after idle at about 140K miles. Does not happen all the time at the same idle length and is better now at 194K than when it started.

OK so I agree that high vacuum at idle or at any time can pull oil over through the vent tubes that run from the valve cover to the intake.

My question is what creates the vacuum to begin with? and why would it be more at 140K than it was at 50K? What changed?

Are worn parts to blame for higher vacuum? is the intake drive at the rear the culprit. What does the pressure regulator do at the rear of the intake?

I have also been told that an engine is at its highest vacuum at idle.

So I have more questions than answers. Here again is the final one. Is the vacuum at idle higher than anytime previous prior to the smoke starting?
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