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7 Series - E65 / E66 (2002 - 2008)
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  #26  
Old 01-31-2013, 08:15 PM
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amcrae amcrae is offline
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Would the new AGA kit Sec Air carbon cleaning kit fix it this problem.AGA our the same people who made coolant pipe kit...
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  #27  
Old 02-01-2013, 06:04 AM
Davidf Davidf is offline
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The (future) AGA secondary air port cleaning kit will only fix the "secondary air low flow" error message. The fault is generated due to carbon build-up in the heads that clog the port at the exhaust valve. The carbon build-up is due to the leaky valve stem seals. The AGA kit might allow sufficient cleaning of the ports to make head removal not necessary, but at $250 it is about the same cost as removing the heads DIY when you figure in head gasket and head bolt parts cost. Plus, pulling the heads ensure a better job of cleaning than using the AGA kit. IMHO.
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  #28  
Old 02-06-2013, 04:39 PM
Chris29817 Chris29817 is offline
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I have 06 with 119k miles and I am having the same issues. BMW service wants 7900 to replace all the seals. 44 hours of labor is banana's.
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  #29  
Old 02-06-2013, 04:43 PM
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First_745Li First_745Li is offline
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Originally Posted by Chris29817 View Post
I have 06 with 119k miles and I am having the same issues. BMW service wants 7900 to replace all the seals. 44 hours of labor is banana's.
They are out of their freakin mind..
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  #30  
Old 02-06-2013, 05:58 PM
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When doing the value cover gaskets can you change out the valve stems at the same time?
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  #31  
Old 02-06-2013, 06:06 PM
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Yes you can if your up for a big job. If you plan on doing valve seals then yes you will end up doing valve cover an upper timing cover. If you only plan on doing valve cover an upper timing cover its a lot more work involved to get to valve seals. Ultimately just do valve cover an timing cover until you are ready to tackle or have enough cash to do the valve seals.
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Last edited by Rookie2008; 02-06-2013 at 06:19 PM.
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  #32  
Old 04-02-2015, 12:28 PM
Alwaysneedhelp Alwaysneedhelp is offline
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Originally Posted by cmpcpro View Post
All the engines out there that run to 200k plus and the dealer says, Oh yes, after 100k the heads have to be repaired.. sorry, I own an E65 too, but that makes me feel like my motor is junk and I am at 130k with no smoke after 20min idle..
The dealers are nothing but crooks.
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  #33  
Old 04-02-2015, 12:33 PM
Alwaysneedhelp Alwaysneedhelp is offline
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Originally Posted by Stephen Max View Post
Yes, replacing valve seals with the head on the engine is a well-known and time honored procedure. I am going to do mine myself sometime this spring.
I plan on doing this myself too. So, are you saying it's ok to replace the seals with the heads on? I've heard both but I don't want to screw something els up if it's really not recommended. Do you happen to know where I can find a good step by step for heads on valve stem replacement along with all the tools I'll need? Thanks Stephen
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  #34  
Old 04-02-2015, 12:49 PM
Davidf Davidf is offline
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If you are going to do the work, then you need the AGA valve stem seal replacement tool kit. AGA's site has good instructions/videos. I have done the valve stem seal replacement and it was not fun. Not terrible difficult, just VERY tedious. You do not need to remove upper timing covers as someone mentioned above. I ended up changing coolant transfer pipe at the same time (so, I had the intake manifold out of the way as well). I also had a blocked secondary air passages and attempted to clean at the same time as well. I successfully change the coolant transfer pipe and valve stem seals, but was unsuccessful with the cleaning the block air passages. The work took about 20+ hours.

Incidentally, several hundred miles after the stem seals were replaced, the secondary air passage fault cleared itself has not returned since (over 6 months). I believe once the excess oil was eliminated from the combustion chamber, the carbon in the air passages eventually burned off to the point of allowing air to pass. Fuel economy also improved significantly and oil consumption is now a non issue (130k miles on engine).
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  #35  
Old 04-02-2015, 12:57 PM
Stephen Max Stephen Max is offline
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Originally Posted by Alwaysneedhelp View Post
I plan on doing this myself too. So, are you saying it's ok to replace the seals with the heads on? I've heard both but I don't want to screw something els up if it's really not recommended. Do you happen to know where I can find a good step by step for heads on valve stem replacement along with all the tools I'll need? Thanks Stephen
I eventually bit the bullet and removed the heads. That was necessary for two reasons. 1) the secondary air ports needed to be drilled out. They were totally clogged with rock hard carbon, and there is no way to dill them without either removing the heads or removing the engine. 2) I wanted to make sure that the valve guides were good. Turns out that several needed to be replaced. I was able to do the job myself for about $1000. Couple of hundred for gaskets and o-rings and the rest for the machine shop to do the valve job and drill the SA ports. That was about 15 months ago, the car has been running great since. Pulling the heads was a bear of a job, I took a shortcut and pulled the heads with the headers and cats still attached. There is barely enough room to do it that way.
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  #36  
Old 04-02-2015, 01:16 PM
Davidf Davidf is offline
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AGA now seals a tool to "dig" the carbon out of secondary air ports. But, you still have to pull the exhaust manifolds to use the pick tool. I guess I was lucky the air ports cleared themselves (only clogged on one side). I could get absolutely zero air through the passages when I tried to clean...now all is well after running the engine sans excess oil in the combustion chamber.

Also, if I pulled the heads, I would probably Time-Sert all the head bolt holes just to be safe.

Last edited by Davidf; 04-02-2015 at 01:17 PM.
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  #37  
Old 04-03-2015, 10:37 AM
TheCloser TheCloser is offline
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God I love this forum
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  #38  
Old 04-06-2015, 12:44 PM
Alwaysneedhelp Alwaysneedhelp is offline
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Thanks all, very good info. Just to make sure I don't miss anything I think I will take off the heads, what the hell right? What am I looking for with regards to the stems needing work? Are they out of round or not centered? What will the shop do to them? Sorry, no idea on this one.

Thanks!
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