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F10 / F11 (2011 - Current)
The new chapter in the highly successful story of the BMW 5 Series Sedan (F10) and wagon (F11)

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  #1  
Old 07-14-2013, 09:21 PM
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Blue Smoke from exhaust

I found an interesting notation while reading the BMW N63 Engine - Technical Training Workbook (Page 20)

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.
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  #2  
Old 07-16-2013, 09:41 PM
Bmwlvr60 Bmwlvr60 is offline
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White Smoke = New Pope
Black Smoke = Still Deciding
Didn't know what Blue Smoke meant- new one for me
;-)
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  #3  
Old 07-17-2013, 09:53 AM
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Quote:
Originally Posted by Bmwlvr60 View Post
White Smoke = New Pope
Black Smoke = Still Deciding
Didn't know what Blue Smoke meant- new one for me
;-)
I don't understand what you're saying or asking (New Pope ?)
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  #4  
Old 07-17-2013, 10:10 AM
ae86pwr ae86pwr is offline
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People have been using oil catch cans to avoid burning oil blow pass.
See the attached product blog post:

http://blog.bavauto.com/9477/bmw-n62...i-750li-x5-x6/

and

http://blog.bavauto.com/13526/bmw-n5...35i-335i-535i/
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  #5  
Old 07-17-2013, 02:13 PM
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Quote:
Originally Posted by ae86pwr View Post
People have been using oil catch cans to avoid burning oil blow pass. See the attached product blog post:
http://blog.bavauto.com/9477/bmw-n62...i-750li-x5-x6/
and http://blog.bavauto.com/13526/bmw-n5...35i-335i-535i/
Yes - but what happens when they go for their Smog Inspection when the emissions have been modified. Does the vehicle owner have to go to the arbitrator for approval?
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  #6  
Old 07-17-2013, 05:44 PM
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Does the catch can need to be emptied manually?
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  #7  
Old 07-18-2013, 07:26 AM
Ken@BavAuto Ken@BavAuto is offline
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Quote:
Originally Posted by Donm View Post
Does the catch can need to be emptied manually?
Yes they do. But it's not something you need to empty all the time either. Most people check them once a month or so. However the catch cans we carry are currently only available for N54 and N55 engines. Our blog post for the stock system was referring to the N62 engine which has replacement valves available. And we sell a lot of them. But on the OP's N63 the crankcase vent valves are built into the valve covers. So to replace one you have to replace the entire valve cover which is currently $370.95 a side. Hopefully it will be a more reliable setup than they used in the past.
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  #8  
Old 07-18-2013, 10:13 AM
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Quote:
Originally Posted by Ken@BavAuto View Post
Yes they do. But it's not something you need to empty all the time either. Most people check them once a month or so. However the catch cans we carry are currently only available for N54 and N55 engines. Our blog post for the stock system was referring to the N62 engine which has replacement valves available. And we sell a lot of them. But on the OP's N63 the crankcase vent valves are built into the valve covers. So to replace one you have to replace the entire valve cover which is currently $370.95 a side. Hopefully it will be a more reliable setup than they used in the past.
The valve is serviceable (oil/air cyclone) on the N63 when cover is removed - I'm not sue on the N62 (see attached page 20)

http://prodcds.bmwuniversity.com/lib...0Engine_WB.pdf

Last edited by A B Able Truck; 07-18-2013 at 10:14 AM. Reason: spelling
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  #9  
Old 07-18-2013, 10:39 AM
Ken@BavAuto Ken@BavAuto is offline
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Quote:
Originally Posted by A B Able Truck View Post
The valve is serviceable (oil/air cyclone) on the N63 when cover is removed - I'm not sue on the N62 (see attached page 20)

http://prodcds.bmwuniversity.com/lib...0Engine_WB.pdf
The N62 has a removable valve on the top of each valve cover.

Page 20 in that document explains how it works on the N63 and it clearly shows bolts. However I'm not seeing any individual parts of the system besides hoses being available on the ETK. There could be some things listed in the service system that don't show up on the ETK I'm looking at though.
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  #10  
Old 07-18-2013, 11:09 AM
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Quote:
Originally Posted by Ken@BavAuto View Post
The N62 has a removable valve on the top of each valve cover.
Page 20 in that document explains how it works on the N63 and it clearly shows bolts. However I'm not seeing any individual parts of the system besides hoses being available on the ETK. There could be some things listed in the service system that don't show up on the ETK I'm looking at though.
I have an N62TU - had oil consumption & smoke issues until I fixed ?? (bandaid) My question is if I were to pull the valve covers - could I clean the cyclone ports (serviceable)? The picture for the N63 shows that it can be disassembled - can the N62 ??
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  #11  
Old 07-18-2013, 11:26 AM
Ken@BavAuto Ken@BavAuto is offline
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Quote:
Originally Posted by A B Able Truck View Post
I have an N62TU - had oil consumption & smoke issues until I fixed ?? (bandaid) My question is if I were to pull the valve covers - could I clean the cyclone ports (serviceable)? The picture for the N63 shows that it can be disassembled - can the N62 ??
I haven't heard of anyone taking apart the valves on the N62. What usually seems to fail is breather valve right on the top of the valve cover and they aren't terribly expensive to just replace. Part number is 11 12 7 547 058 and they are in stock for $21.95 each. These are an updated design over what likely came on your car and one is needed per valve cover. It's what we covered in the blog post but we didn't specifically label it as being for N62TU.

http://blog.bavauto.com/9477/bmw-n62...i-750li-x5-x6/
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  #12  
Old 07-18-2013, 01:01 PM
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The bad diaphragms will cause a vacuum leak (won't suck oil) But if the cyclones are dirty (theory is) they would become ineffective at separating the oil from air causing excessive oil consumption/smoke.

Last edited by A B Able Truck; 07-18-2013 at 01:01 PM. Reason: spelling
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  #13  
Old 02-20-2014, 10:59 AM
FREE100KSECRET FREE100KSECRET is offline
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2003 X5 Suddenly Blowing Smoke Out Driver Side Exhaust

Curious,

All of a sudden one morning when I started car, below freezing, it started to blow smoke and oil residue out driver side exhaust. What is strange is it runs OK, just smokes, and it went through a couple quarts while I was trying to see what was wrong while running at idle, actually dripping oil out exhaust tips? Is it safe to drive it to shop, or not. Of course, I will keep an eye on oil level, but can I drive car with dip stick out to relieve vacuum pressure even if it runs rough at idle?

Thanks,
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  #14  
Old 02-20-2014, 12:24 PM
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Quote:
Originally Posted by FREE100KSECRET View Post
Curious,

All of a sudden one morning when I started car, below freezing, it started to blow smoke and oil residue out driver side exhaust. What is strange is it runs OK, just smokes, and it went through a couple quarts while I was trying to see what was wrong while running at idle, actually dripping oil out exhaust tips? Is it safe to drive it to shop, or not. Of course, I will keep an eye on oil level, but can I drive car with dip stick out to relieve vacuum pressure even if it runs rough at idle?

Thanks,
If oil is dripping out the exhaust & using a couple qts. while you're looking at it - STOP THE ENGINE - DO NOT DRIVE
It will hydrolock

Last edited by A B Able Truck; 02-20-2014 at 12:25 PM.
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  #15  
Old 02-20-2014, 01:51 PM
FREE100KSECRET FREE100KSECRET is offline
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Thanks,

So what is hydrolock technically speaking, never heard that term before. What causes this, the infamous condensation freeze in CCV hose, and if so, will it melt down now that weather is above freezing?

Thanks,
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  #16  
Old 02-20-2014, 03:39 PM
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What engine do you have? The N62 normally won't suck that much oil thru the engine. Hydrolock is when the valves are closed - the cylinder has either water and/or oil in it and the piston pushes against the fluid with no where to go.
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  #17  
Old 02-20-2014, 03:50 PM
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Fun video on the 6 cyl. issue;



**
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  #18  
Old 02-20-2014, 04:20 PM
FREE100KSECRET FREE100KSECRET is offline
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It is 4.4 V-8 and I changed oil every 5K with full synthetic 10-30W. I checked it out a little closer, and it runs great, check engine light is on, didn't check codes yet, but smokes like crazy out driver side. Most cars would be missing like crazy with that much oil being burned, so it must not be fowling plugs, but maybe on exhaust side, don't know the internal vacuum feeds if it is sucking up oil. Sure is strange. Am going to check and replace CCV valves and hoses and keep my fingers crossed.

Thanks,
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