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5 Series DIY
Knowledge Is Power! ~ The place for do-it-yourself threads on a variety of topics. Start a thread describing a particular job (oil change, cooling system overhaul, brakes, shocks and springs, etc.) or search for one you need help with!

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  #1  
Old 06-13-2013, 03:41 PM
A B Able Truck's Avatar
A B Able Truck A B Able Truck is offline
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Location: San Diego
 
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Mein Auto: 2006 550I (N62TU) V8
Valve stem seals "NOT"

**The valve stem diameter was increase at a production point to remedy the guide problem. I can not believe BMW would continue to use inferior stem seals after this change. I have attached my post related to this carbon buildup issue. My vehicle has passed smog test & no longer smokes. I did have to run the proceedure twice before it lowerd the HC levels within specs. And I will probably do it 1 more time for good measure. It cost me $200 to fix compared to the $4000 > $5000 I was told it would take for a guide/seal replacement **

2006 BMW 550I 92,000 miles V8 (N62TU)
Smokes (white/gray ) failed visual Smog Report (15 mph HC ppm Measured 91 Max. 49)

It used oil (approx. 1 qt. per 2-3 tanks) and I read the history of V8 valve stem problems (internet & local shop research), I was about to have the valve guide/stem seals replaced or drive the car off a cliff. But it didnt have the classic symptoms of defective valve stem seals/guides. It also ran like a rapped ape (old school for ran great). Im a heavy truck mechanic with old school car experience (35 years). The plugs were clean and the exhaust smelled funny, also the exhaust dripped clean water no matter how hot or long it ran. I pulled the intake throttle housing and noticed excessive oil. Replaced the (ccv) diaphragms in the valve covers (torn) & read up on the cyclone oil separator (like a Dyson vacuum). Because I wasnt happy with the oil consumption & residue in the intake, I fabricated a sponge with screen for each valve cover vent outlet. This cleaned out the oil residue and I assume it will reduce oil consumption while allowing crankcase recirculation, but it did not solve the smoke problem. I pulled the spark plugs and stuck a camera down a couple plug holes. Yes, the top of the pistons were loaded with carbon. So I sprayed Sea Foam in each plug hole, followed by a shot of low pressure shop air to help spread it around the piston. I let it sit for an hour or so, then reinstalled the plugs. I topped off the fuel tank with high octane and added 12 oz. of CRC Fuel System Cleaner (part #05063) to the tank. 100 miles later and what a difference no smoke or water dipping out the exhaust after warm up. Im in love with the car again
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  #2  
Old 06-16-2013, 06:25 AM
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A B Able Truck A B Able Truck is offline
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Mein Auto: 2006 550I (N62TU) V8
**** Day 7 - 610 miles later and still no smoke or excessive water from tailpipe ****

**Note: I need to give full credit to my 25 yr. old friend/mechanic/smog tech/neighbor for his insistence I try Sea Foam. He works on BMWs, Mercedes and other makes. I never heard of Sea Foam and didn't believe it would solve my issue (either). Although it was my idea to soak the piston tops first before spraying it thru the intake. I'll also take credit for the sponge/foam/screen in the PCV hose idea. **
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  #3  
Old 09-06-2015, 09:00 PM
jfife83 jfife83 is online now
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Location: KY
 
Join Date: Jun 2014
Posts: 47
Mein Auto: '05 545i
You describe the same issue I have...my car runs great as well...how much sea foam did you spray into intake....your sponge/screen sounds like an oil trap I've seen installed just much more simple. ...do you have any pics of this you could pass along
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  #4  
Old 10-28-2015, 04:48 PM
pcb5 pcb5 is offline
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Mein Auto: 545i
Any updates? How's it running?
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  #5  
Old 10-28-2015, 05:03 PM
jfife83 jfife83 is online now
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Location: KY
 
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Mein Auto: '05 545i
I actually built the other oil trap that he has on his other thread and it works like a charm....2 days after installing it blue smoke at stop lights gone and oil consumption barely noticeable ....and it's been 2 months....a b truck has it figured out

Last edited by jfife83; 10-28-2015 at 05:07 PM.
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Old 11-29-2015, 07:52 AM
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A B Able Truck A B Able Truck is offline
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Mein Auto: 2006 550I (N62TU) V8
I don't get e-mail alerts when someone replys to a thread (forgot about the DIY posts), but jfife83 sent a PM that the "catch can" hose assembly is working fine. Good to hear not all need valve stem seals. Over time as these cars are resold, who knows if your vehicle has already had the seals replaced.
Always check your CCV & hoses first - Be sure your crankcase is sealed for them to operate correctly - And religiously fight the carbon build up.
I modified my "Catch Can" hoses since my original post;

http://www.bimmerfest.com/forums/alb...ictureid=39148

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Old 11-29-2015, 07:52 AM
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Duplicate post **
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Last edited by A B Able Truck; 11-29-2015 at 07:54 AM.
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  #8  
Old 11-29-2015, 09:08 AM
jfife83 jfife83 is online now
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Location: KY
 
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Mein Auto: '05 545i
Yes AB that's the one I built as well...my smoke problem was exactly as you had...just wanted to say thank you
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