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  #11  
Old 04-25-2013, 12:19 AM
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Torn PRV gives a whistling sound...hmmmm. Would one hear this through the center vent of the HVAC system? Might explain the odd sound I hear from time to time there.

LTFT = long term fuel trim? You were doing so well with acronyms up until this one...

Great write-up. Thanks!
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  #12  
Old 05-19-2013, 01:46 AM
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gotta keep this post on top... or, in DIY section, for an excellent explanation of the "blue smoke" phenomenon!!!
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  #13  
Old 06-24-2013, 09:48 PM
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Hey McDonaldD how everything running? Has the smoke come back?
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  #14  
Old 07-02-2013, 12:38 PM
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Help with White Smoke After Idling - 2006 X5 4.4L (E53/N62)

McDonaldD - Amazing write-up! Very happy to find someone with the exact problem and it appears that you fixed the issue! Congrats and thank you for taking the time to share your experience with us. Very encouraging that it could something other than a blown head gasket that will cost us thousands to fix! I was recently laid off and can't afford a $8K fix, so your post is a relief and gives me hope. I love my X5 and but for the "cloud of shame" the car runs like a champ!

My white smoke issue started about a month ago - my 2006 X5 4.4L (E53/N62) with 80,000 miles - "an embarrassing cloud of shame - typically after accelerating from prolonged idling." Happens more noticeably on warm sunny days. Only difference is the smoke is only coming out of the driver's side tailpipe.

I replaced my Pressure Regulating Valves, as many suggested, but that didn't help since they weren't torn.

McDonaldD - I am a DIYer that is somewhat mechanically inclined and recently completed simple stuff like changing my brake pads and rotors, oil/filter changes, etc. But what you are describing seems a little over my head. So I would like to ask for a favor and propose to ask for your help. It appears that we live close by, I am in San Francisco. I propose that I will buy all the parts and over a day or two get your help with doing exactly what you did on your X5 and I could compensate you for your time. It would be a great learning experience for me as well. That would be a tremendous help to me, let me know if you are willing and have the time.

BenSF
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  #15  
Old 07-04-2013, 03:52 AM
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pcb5 - Everything is running great! I recently changed the fluid/filters in my transmission and differentials - After all of the work, I'm now averaging a combined 19.7 Smoke-FreeMPG - compared to ~16 SmokeFullMPG. Aside from replacing a flatted/slashed tire from my last trip to Tahoe, my next task is to track down a permanent fix for the random yellow tinge that my Nav screen has become increasingly fond of.

BenSF - The post-fastrak stop light on Bay Bridge helped render some of my car's finest works. If you can wait about two weeks, I can free up the time to work with you. Its quite the job but nothing to be afraid of: 1 full day would be cutting it close, a plan calling for two would be wise. Do you have a garage, an arsenal of tools, jack, jack-stands, and a desire to feel insanely accomplished? As long as you have the last one, I'm happy to help; everything else can be worked out.

The wait is perfect for you to order parts - While helpful and convenient, BMW of SF can get quite pricey. I believe I still have my parts list(s)/receipts(prices) from when I did it...but its probably best to hash those details out through e-mail, phone, or otherwise. Let me know, I'll be back in the city by Tuesday, July 9th, but I'll be pretty busy through the 17th or 18th. My e-mail is just my username at either me.com or berkeley.edu - I haven't had a lot of luck being notified of private messages on here.
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  #16  
Old 07-04-2013, 11:56 AM
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Wow very nice post
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  #17  
Old 07-09-2013, 07:24 AM
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Quote:
Originally Posted by McDonaldD View Post
pcb5 - Everything is running great! I recently changed the fluid/filters in my transmission and differentials - After all of the work, I'm now averaging a combined 19.7 Smoke-FreeMPG - compared to ~16 SmokeFullMPG. Aside from replacing a flatted/slashed tire from my last trip to Tahoe, my next task is to track down a permanent fix for the random yellow tinge that my Nav screen has become increasingly fond of.

BenSF - The post-fastrak stop light on Bay Bridge helped render some of my car's finest works. If you can wait about two weeks, I can free up the time to work with you. Its quite the job but nothing to be afraid of: 1 full day would be cutting it close, a plan calling for two would be wise. Do you have a garage, an arsenal of tools, jack, jack-stands, and a desire to feel insanely accomplished? As long as you have the last one, I'm happy to help; everything else can be worked out.

The wait is perfect for you to order parts - While helpful and convenient, BMW of SF can get quite pricey. I believe I still have my parts list(s)/receipts(prices) from when I did it...but its probably best to hash those details out through e-mail, phone, or otherwise. Let me know, I'll be back in the city by Tuesday, July 9th, but I'll be pretty busy through the 17th or 18th. My e-mail is just my username at either me.com or berkeley.edu - I haven't had a lot of luck being notified of private messages on here.

What a guy!! I wish I lived on the west coast
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  #18  
Old 07-09-2013, 12:07 PM
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McDonaldD - Sent you a note to you email acct. Thanks again for offering to help, I really appreciate it!
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  #19  
Old 07-24-2013, 05:48 PM
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Blue Smoke Issue - 2005 X5 4.4i

Thanks for the excellent information and step by step process of addressing this issue.

I just bought this vehicle for my kids to drive and was just sick when the smoke started two days later.

I live in a small city in central Canada and we have one dealer who is really uninformed about the connection between blue smoke and crankcase ventilation and loss of vacuum seal. He is convinced it is valve seals/stems and suggested finding a new motor as this one was probably toast, he said.

:/

But it didn't FEEL like valves, seals, guides, pistons, rings, etc. so I decided to research it and ended up here, which is by far the most informative post on the web!

After reading your post, I can see that my issue is def. with the crankcase vent. system and not the valves, based on what has been happening to me and McDonaldD: blue smoke on warm engine after idling for any length of time (stop and start type stuff); never any smoke on cold start if the oil that has been collecting somewhere has been purged the day before; a kind of weird feeling on the top end of the motor when smoke is about to blow out (almost like a little shudder?); loss of vacuum pressure when dipstick or oil cap is removed + rough idle. I can tell when it is about to purge the oil out of the exhaust - it loses acceleration on the pedal - almost like a misfire but not really.

So I am going to follow your repair McDonaldD and see if that sorts it out. Can you PLEASE post an itemized parts list of what is needed so I can order it? All the gaskets, grommets etc? I am familiar with REALOEM and I also use Pelican Parts for our BMWs out of warranty.

The dealer and BMW Canada haven't been of much help - the service mgr didn't even know about the technical service bulletin surrounding this issue SI-B-11-01 07. Or maybe he did and just wants me to rebuild the engine.
I dunno ...

Also - I saw the post about Option A and Option B somewhere that PCB5 is talking about. Can somebody please link me to the original thread as I forgot to bookmark it.

Thanks so much everyone!
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  #20  
Old 07-25-2013, 04:04 PM
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Oil consumption was excessive - It smoked - I was told I needed valve stem seals

My car (didn't pass smog & couldn't renew registration);
2006 BMW 550I – 92,000 miles – V8 (N62TU)
Smokes (white/gray/blue) – failed visual – Smog Report (15 mph – HC ppm Measured 91 – Max. 49)

Symptoms & history;
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 didn’t have the classic symptoms of defective valve stem seals/guides. It also ran like a rapped ape (old school for ran great). I’m 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 wasn’t happy with the oil consumption & residue in the intake, I fabricated a Scotch Brite pad filter with screen for each valve cover vent outlet. As well as a pre-filter for the CCV diaphragm base. This cleaned out the oil residue and has greatly reduced oil consumption while allowing crankcase recirculation. 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.

****This note was copied from a BMW Technical Training manual
Note: If the exhaust system produces blue smoke, it is necessary to check whether the engine is also drawing oil into the combustion chamber through the crankcase breather, which suggest that there is a fault in the area of the crankcase breather. A clear sign of a problem is an oiled up clean-air pipe.

****The valve stem diameter was increase at a production point (you would assume) to remedy the guide problem. I don't believe BMW would use inferior stem seals after this change, if ever. My vehicle has now passed smog test & no longer smokes. I did have to run the proceedure twice before it lowerd the HC levels within specs. I will probably was the Chevron fuel treatment from this point on. (See attached TSB) It cost me $200 to fix compared to the $4000 > $5000 I was told it would take for a guide/seal replacement.
SI B 13 05 06 & SI B 13 01 07

**** Day 35 - 1200+ miles later NO smoke or excessive water from tailpipe - It also **** Does not need any oil ****
For those of you seasoned mechanics replacing guides & seals - This worked for me - my vehicle - my situation - but I believe you should diagnose each vehicle on an individual basis - Regardless of BMW guide/valve stem history.
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