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  #141  
Old 11-24-2016, 10:56 PM
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The CCV regulates flow to maintain a certain level of vacuum in the crankcase while the PCV just regulates (basically 2 positions) flow according to how much vacuum(level) is in the intake manifold. Completely different. Plus the CCV also uses a cyclone to seperate the water (and oil) droplets and return them to the crankcase.
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  #142  
Old 11-25-2016, 12:00 AM
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Sorry I didn't make myself clear.

I know exactly what PCV and CCV mean. But that was not my question.

I am ONLY interested in long-term report: after some 5000-10,000 miles AFTER doing this mod by BavarianE39, what is the oil consumption BEFORE and AFTER the mod. If people can post the following info, it'd be great:

- Year/Model/Trans/Mileage (example: 2006 X5 M54 6spMT with 122K miles).

- Oil consumption BEFORE mod = _________

- Oil consumption AFTER mod = _________
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  #143  
Old 11-25-2016, 01:38 AM
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See this thread

http://www.bimmerforums.com/forum/sh...umption-Solved
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  #144  
Old 11-25-2016, 01:54 AM
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And this thread who has done it first
Long back
http://www.bimmerforums.com/forum/sh...tal-in-10-mins!!!
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  #145  
Old 11-25-2016, 08:24 AM
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And here is you'll see another setup and mileage and cars running on this setup
http://www.bimmerforums.com/forum/sh...c-Heavy)/page4
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  #146  
Old 11-25-2016, 12:00 PM
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Thanks but I have read all the threads related to M54 engine oil consumption.
It seems that mlody (aka "Elbow Grease" on youtube) eventually had to rebuild his engine using new piston rings as in the video below:



https://www.youtube.com/watch?v=fLJGoCuNDzo


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  #147  
Old 11-25-2016, 12:53 PM
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But I think people are changing this ccv even me cause it's failing prematurely cause if that rubber piece inside got damaged cause of oil
So they shifted to this mods
Or do you think this modification make him rebuild his engine ?
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  #148  
Old 11-25-2016, 01:12 PM
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- My CCV was overhauled recently, all BMW parts so it is brand-new (also cleaned the dipstick housing channels, which were not blocked). Car still consumes 1qt/500 miles.

- I am looking for long-term report on the mod.

- I may do the mod today and report back in 500 miles (another month) re oil consumption.
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  #149  
Old 11-25-2016, 01:14 PM
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cn90
This is my experience with this mod:
2003 X5 3.0 Auto
Mode installed - 188k miles
Current odometer - 212k miles
Oil consumption before mode - 1QT / 1200 miles
Oil consumption after mode - 0.5QT / 6000 miles
Engine runs perfectly. No codes!
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  #150  
Old 11-25-2016, 01:32 PM
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Thanks axgordon,

You convinced me, I am taking the thing apart and go to Home Depot today to get all the odds and ends.

QUESTION: I don't plan to use the Duralast PCV Valve (which is basically one-way valve with the spring inside to allow air to be sucked in at certain vacuum value) simply b/c I am afraid if the PCV is ever stucked closed, the crank case pressure will be very high and some seals will be blown, with the RMS being the worst to repair.

So, who uses Duralast PCV and who does not?
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