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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 08-04-2014, 06:03 AM
vasq4932 vasq4932 is offline
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Replaced stems still smokes!

My mechanic has replaced my valve stems.Cleaned the heads and valve covers timing case covers the whole 9 & 10.. I had a toxic smell coming from tail pipe but after replacing the stems it no longer smells as such but still smokes. I have no coolant loss just this smoke. It's driving me crazy!! Any other reason the man upstairs would allow this vehicle to smoke besides for the valve stems.please help!!!


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  #2  
Old 08-04-2014, 08:17 AM
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CCVs ???? (valves and/or hoses - oil in the intake)
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  #3  
Old 08-04-2014, 08:37 AM
vasq4932 vasq4932 is offline
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No sir We are doing the CCV today. I've done everything up under the sun. We don't see any leaks anywhere. I replaced my stems due to bmw and an Indy telling me that was the cause. After reading through the forums I see that CCV is the cheap less likely fix but I'm all out of options sir. I love my car and just want this to go away as I see everyone else does. This is a list of everything I've done so far


Valve steam seals
Gaskets for alternator
Valve cover gaskets
Spark plug and tube
Oil pressure sending unit n engine vacuum
Front sway bar
Trans pan gasket and mechatronics
Timing case cover O-ring

Is there anything I'm missing. Thanks for your time sir!



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  #4  
Old 08-04-2014, 09:22 AM
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Check the hoses carefully - I was sucking air beneath the insulation and did not realize it until I noticed a slight seepage from under the insulation. Any vacuum leak within the crankcase won't allow the CCVs to work correctly. A telltale sign is excessive oil in the intake.
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  #5  
Old 08-04-2014, 09:26 AM
vasq4932 vasq4932 is offline
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Thank u so very much. I will have my mechanic look into this also this evening. Thank you once again!


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  #6  
Old 08-29-2014, 09:25 AM
vasq4932 vasq4932 is offline
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So I replaced the CCV and had my seals checked again and the car is still smoking. Doesn't smoke as bad when I'm parked but when I'm idling (like when I take my daughter to school and smoking everyone out while sitting in line embarrassing!) is when it gets bad!!!!Im losing about a quart a week of oil but don't have any leaks that can be seen....Is there anything that my mechanic is missing.. Thanks in advance Click image for larger version

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  #7  
Old 08-29-2014, 09:27 PM
grayautomotive grayautomotive is offline
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oil rings worn, oil seeping past oil rings getting into combustion causing oil burn slowly causing smoke. there for causing loss of oil maybe..
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  #8  
Old 08-29-2014, 10:59 PM
J750 J750 is offline
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Your wheels may be the culprit.
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  #9  
Old 08-30-2014, 01:00 PM
meangreen94z meangreen94z is offline
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Did he replace all 32 valve seals or just the exhaust valve seals? Was it worse before? The same?
There is an oil return valve in your passenger valve cover. If it gets sludged, stuck, or blocked you can have oil collect in the intake. There is an updated passenger valve cover and breather hose. Have your mechanic look in the breather hoses and intake for excessive oil.
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  #10  
Old 08-30-2014, 01:17 PM
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Quote:
Originally Posted by meangreen94z View Post
Have your mechanic look in the breather hoses and intake for excessive oil.
+1 This should have been the first thing checked and repaired
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  #11  
Old 08-31-2014, 08:18 AM
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Quote:
Originally Posted by J750 View Post
Your wheels may be the culprit.

I lol'd. But seriously check the ccvs and hoses. Did the mech change all seals? My car stopped smoking immediately after I completed mine.


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  #12  
Old 09-01-2014, 02:37 PM
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samadkins29 samadkins29 is online now
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For those of you with this issue/resolved. Prior to this were you losing/burning oil?
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  #13  
Old 09-01-2014, 08:23 PM
Pimpin745 Pimpin745 is offline
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I have the same problem they keep telling me that it may be a crack in the head gaskets or something. Now is your check engine light on?


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  #14  
Old 09-02-2014, 05:27 AM
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csmeance csmeance is offline
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Do a leakdown test to see how much pressure you are loosing from the rings, it sounds like this shop is trying to take you for an expensive ride in the dark!
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  #15  
Old 09-02-2014, 06:53 AM
Pimpin745 Pimpin745 is offline
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Exactly what I was thinking!!!


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  #16  
Old 09-02-2014, 04:59 PM
Pimpin745 Pimpin745 is offline
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So do you think it's as bad as their trying to make it sound? Or no?


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  #17  
Old 09-03-2014, 06:20 AM
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Quote:
Originally Posted by Pimpin745 View Post
So do you think it's as bad as their trying to make it sound? Or no?

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A shop should give you a plan of attack and you need some preliminary info (Start with the least expensive) Is there oil in the intake? Are you loosing coolant, with no external leaks? etc.

You also need to post your vehicle info so we know what you have.
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Last edited by A B Able Truck; 09-03-2014 at 06:22 AM.
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  #18  
Old 09-03-2014, 06:22 AM
Pimpin745 Pimpin745 is offline
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Yes no external leaks


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  #19  
Old 09-03-2014, 06:24 AM
Pimpin745 Pimpin745 is offline
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I'm sorry kind of new to this but I have a 2004 bmw 745li


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  #20  
Old 09-03-2014, 06:55 AM
troynado troynado is offline
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I've got an 06 750Li with the exact same issue. Snaking through the school parking lot to pick up my children and smoking out every other parent and teacher around is embarrassing. I'm convinced it's got something to do with the hoses coming off the CCV's or close by. I'm getting more vacuum than I've ever seen on a car before. Too many folks with the same issue. I can't help but think that the strong vacuum is sucking oil through a hose into the intake. Is this possible?
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  #21  
Old 09-03-2014, 06:59 AM
Pimpin745 Pimpin745 is offline
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Idk I'm just hoping that I won't have to replace the engine or have it rebuilt.


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  #22  
Old 09-03-2014, 08:59 AM
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Quote:
Originally Posted by troynado View Post
I've got an 06 750Li with the exact same issue. Snaking through the school parking lot to pick up my children and smoking out every other parent and teacher around is embarrassing. I'm convinced it's got something to do with the hoses coming off the CCV's or close by. I'm getting more vacuum than I've ever seen on a car before. Too many folks with the same issue. I can't help but think that the strong vacuum is sucking oil through a hose into the intake. Is this possible?
You shouldn't have a strong vacuum - it should be very slight - unless your valvetronics aren't working, then it reverts to conventional throttle valve operation. But then if your CCVs are working and your crankcase is sealed, the CCVs should be held shut from the excessive vacuum (no oil heading towards intake except at initial startup) It's a complicated engine to diagnose.
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  #23  
Old 09-14-2014, 08:58 PM
vasq4932 vasq4932 is offline
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It ended up being a bent valve cover on the driver side not the valve cover gaskets but the whole valve cover itself. My intake manifold gasket on that side needs to be replaced also. Anyone who has the smoking issue please do a leak test first. All the information given to me on here was over valuable and I greatly appreciate it. Thanks!!


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  #24  
Old 09-15-2014, 11:55 AM
Stompkin Stompkin is offline
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Excellent, glad to hear it is fixed! I need to get my valve cover gaskets replaced and have been wondering whether or not to get the valve covers replaced as well when I get it done....
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