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  #41  
Old 06-09-2015, 10:00 PM
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Quote:
Originally Posted by Ricky Bobby View Post
^axgordon, please share pics of your setup and parts needed to make it look cleaner and completely "plug and play"!

How was vaccuum since converting to the simple PCV system?
Ricky,
See attached pictures. I did not measure vacuum after the mod yet. The crankcase remains under vacuum for some time after the engine shut off - i don't see any issues with that.
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  #42  
Old 06-09-2015, 10:09 PM
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Quote:
Originally Posted by imalabil View Post
In mulling this over I have a couple of questions before I take the plunge this weekend:

1. Oil will reduce the octane value of gasoline. This change will presumably put more oil vapor into the intake manifold. Has anyone noticed a tendency to ping/knock with this set-up?
2. I'm wondering if more oil combusted could foul 02 sensors or catalytic converters.

Of course, other cars use simple PVC systems and don't necessarily suffer these side-effects, but I thought I'd ask.
Imalabil - I do not have clear answer why this mod greatly reduce oil consumption, however this is what many including my self observed. This is clear indication that less oil got burned causing less impact on the fuel octane and less stress for catalytic converters and O2 sensors. My experience based on less than 2500 miles. I will continue to monitor and report to the board.
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2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
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2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
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1999 528i (Sold)
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  #43  
Old 06-10-2015, 09:49 AM
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axgordon, thanks for the pics, they look great. Since that PCV needs to be vertical, call me stupid but could you not put it vertical facing downward and use a 90 degree elbow with hose to eliminate the "hose loop" on the upward facing PCV?
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2013 X5 35D (CEO's) - Born on 5/17/2013 -
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Last edited by Ricky Bobby; 03-28-2017 at 10:14 AM.
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  #44  
Old 06-10-2015, 09:52 AM
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Quote:
Originally Posted by axgordon View Post
Imalabil - I do not have clear answer why this mod greatly reduce oil consumption, however this is what many including my self observed. This is clear indication that less oil got burned causing less impact on the fuel octane and less stress for catalytic converters and O2 sensors. My experience based on less than 2500 miles. I will continue to monitor and report to the board.
This happens because of the loop of the hose going UPWARD: oil goes down by gravity (not by separation as in the E53 stock CCV valve), and air gets sucked into the loop. So oil consumption is minimal.

Conceptually, this is similar to E23 (1983-1987 735i) with simply a hose slating upward as the CCV, talking about simplicity.
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  #45  
Old 06-10-2015, 10:11 AM
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Two things come to mind...

1. For those who want to sell the car in the future, the next owner will likely has some questions for all these "snakes" running around on top of the engine. You will need to explain it to him/her.

2. The E23 (1983-1987 735i) Intake Manifold sits ABOVE the engine.
So the CCV system in that car is simply a tube going upward, see photo for #11 in E23:
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  #46  
Old 06-10-2015, 10:48 AM
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Quote:
Originally Posted by trader4 View Post
Trader4 – All good points. I am myself firm believer in the effectiveness of stock components and always try to use genuine parts for critical systems. This situation is little different. Let me try to answer some of your questions:

If you think having to add oil between oil changes is unusual with high mileage, 10+ year old cars, then you must have some exceptional
vehicles.
Ricky’s car is not high mileage car - less than 80k miles if I remember correctly. My 528i with m52tu engine did not consume a drop of oil at 180k miles

Of course BMW put the CCV system on for emissions. My point was
that if it results in a decrease in MPG compared to the simple PCV
type design, then they would have to be pretty dumb to use the oil
separator design when they are desperate to increase MPG.
All the other manufacturers of all kinds of vehicles are meeting EPA with PCV type designs.

Yes. Original BMW CCV system works perfectly fine on m52tu motors. I did not found any reference that m52tu ever hydro locked in cold climate. The only known mode of failure – slugged CCV causing oil leaks and drivability / idling issues. The only substantial difference in design between m52tu and m54tu is low-tension rings on the latter. I spoke with the reputable performance shop owner and he confirmed that he successfully fixed high oil consumption on two m54tu by replacing piston rings. My theory here that extra blow by gases reach in H2O on m54tu causing simply overload capacity of stock CCV system. Apparently, these low-tension rings starting to fail at 60k+ miles causing excessive blow by. This is why we do not see mayo on low mileage m54tu. It is frozen mayo causing catastrophic failure of CCV and hydro lock as of result.

Perception of peppiness is almost meaningless, given the high potential
for the placebo effect.

Cannot argue here. Nevertheless, I noticed better performance myself.

BTW, you didn't answer the question as to what the reference point
for these claimed benefits is? A new, stock CCV system? Or an old 100K,
stock one that is possibly failed, known failed, etc.

I was trying to provide this information in my original post. I used my car stats with old, new and aged CCV system. I thing that 5+ years routine of adding oil every 2k miles is reasonable reference point.
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2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
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2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
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  #47  
Old 06-10-2015, 10:56 AM
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axgordon, interested now to hear about the shop owner's opinion on the piston rings. He believed that replacing piston rings on stock CCV setup on M54 would solve oil consumption in higher mileage vehicles? Or alternatively you could keep the low tension piston rings and do the "CCV Bypass/PCV install" like you have done and solve the same issue?

You are correct I just rolled 80k miles a week ago so I'm not as "up there" yet.
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  #48  
Old 06-10-2015, 11:15 AM
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trader4,

I am talking about brand-new stock system from showroom. From an engineering standpoint, E23 is more simple than M52/M54 setup.

1. In the E23, the mixture of oil and vapor goes up the slope (the simple tube). Vapor keeps going up while oil, being heavier, drips back down the valve cover area.

2. In the E53 M54 setup, the Intake Manifold sits LOWER than the valve cover.
So the mixture of oil + vapor goes DOWN the slope and pools at the Separator area.
In theory, oil being heavier goes down the dipstick housing and vapor gets sucked into the Intake manifold.
However, when the membrane opens up (under certain vacuum condition), some oil gets sucked into the I.M.
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  #49  
Old 06-10-2015, 11:18 AM
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Quote:
Originally Posted by Ricky Bobby View Post
axgordon, interested now to hear about the shop owner's opinion on the piston rings. He believed that replacing piston rings on stock CCV setup on M54 would solve oil consumption in higher mileage vehicles? Or alternatively you could keep the low tension piston rings and do the "CCV Bypass/PCV install" like you have done and solve the same issue?

You are correct I just rolled 80k miles a week ago so I'm not as "up there" yet.
Ricky,
let me clarify this - the oil consumption was corrected by replacing worn out piston rings with a new set of the stock rings from the dealer. The shop owner stated that old rings were worn out and did not seal / removed oil correctly.

I did not experiment or have an answer on possible re-positioning of PCV valve. Personally I am totally OK with the loop... for now
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2012 X5 x35i My new toy
2005 X5 4.4 Her's (Retrofitted Servotronic Steering Rack)
2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
2001 M5 Son's car
2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
2001 530i (Sold)
1999 528i (Sold)
1975 2002 (Sold)
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  #50  
Old 06-10-2015, 11:23 AM
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No worries, I imagine worn out rings would cause consumption, but is not the rule across the M54 nor is it something I've read that is something that is done often (replacement of piston rings)

If you guys want a real, OEM solution to delete the CCV, using all OEM parts, perhaps the E46Fanatics guys will tickle your fancy: (M56 Valve Cover with integrated oil separator, VCG, oil fill cap gasket, and breather hose is all thats needed), the M56 VC fits on the M54 with no issues.

The Permanent M54 CCV Delete - E46Fanatics
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