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  #31  
Old 06-09-2015, 09:34 AM
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So since the original DIY you did connect both pieces of the air distribution piece on the manifold and added a "T" correct? Still running like a champ and no consumption, and the PCV is holding up well?
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  #32  
Old 06-09-2015, 10:25 AM
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I just ordered the BMW OEM CCV parts for a CCV overhaul at 115K, simply because the original system is still fine at 115K, so I will stick to the stock setup for now.

However, in the future, if I have to do this CCV again, I may switch to this mod.

For comparison purpose:
- My 1998 528i (M52 CCV setup) consumes nothing between oil changes.
- My 2006 X5 3.0i (M54 CCV setup) drinks about 1 qt every 1,000 miles.

Since the CCV setup is very similar between M52 and M54, I think the oil consumption issue in M54 has more to do with the pistons rings etc. rather than the CCV thingy.


One another note, bimmerforums E39 M54 forum has something similar to the mod in this thread. See the DIY by mcgnms below:

M54 Oil Consumption Solved
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  #33  
Old 06-09-2015, 11:11 AM
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^On the original CCV there is definitely a time element to this so cn90 its probably good idea to replace with updated cold weather parts since you are almost at 10 years old on stock system.

Just to get some peppiness back from the engine, less consumption, and increased mpg's sounds great on this mod. I wonder if doing this PCV and pluming a MannHummel ProVent100 in line would be perhaps the "ultimate" solution to the stock CCV?
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  #34  
Old 06-09-2015, 11:48 AM
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^^I'm talking about BavarianE39's CCV delete and "PCV inline" solution. He reports less consumption and increased mpg. Not talking about the factory CCV system.
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  #35  
Old 06-09-2015, 02:29 PM
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^There are many reports of people who have bypassed the stock system on the M54 (Bimmerforums, E46Fanatics, Bimmerfest) if you read some threads which report increased mpg, and literally zero oil consumption, compared to a working stock system. There are still some who have replaced with updated Cold Weather CCV parts and report oil consumption. I will check mine out when I get home tonight, but I just changed my oil in December and have put about 3k miles on it.

This is the first vehicle I've owned where consumption of oil in between changes is deemed "acceptable" even on a fully working and operational stock system.

BMW put the CCV system on for emissions as far as I can tell and environmental factors, that is more important in my opinion and most likely in their eyes, than fuel efficiency.


Bavarian can you remark about your fuel and oil consumption since installing the "simple PCV" solution, and as well, if you have any perceptions of increased peppiness from the engine as I have seen elsewhere.
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  #36  
Old 06-09-2015, 03:55 PM
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I would like to share my experience with PCV mod (Long...):
The car – 2003 3.0 - Purchased February 2010 at 115000 miles from the original owner. Strictly dealer serviced from day 1 (all documented). From the supplied service records, previous owner complained about oil consumption after ~ 70k miles. Per dealer evaluation, consumption within factory specs. Previous owner disclosed to me, that he adds at least 2Qt between 10k miles oil changes.
Having extensive experience with m52 and m54 engines, I did not want to take chances with CCV and within the first two weeks of the ownership, I replaced valve cover gasket, OFH gasket and entire CCV system except dipstick tube with genuine BMW parts. The dipstick tube was removed and properly cleaned from all gunks. I cleaned a fair amount of mayo from the inside of the valve cover and all CCV lines and valve itself was badly clogged with yellow stuff.
Prior and after the service car run perfectly fine – no smoke or any drivability issues. The car is driven daily and I avoid short trips. Car always parked in the garage where temperature never drops below freezing. The oil consumption slightly increased over the past five years to ~ 1.5Qt per 2000 miles.
Over the past two years, car develop small oil leak from the rear mail seal – no drops on the floor, however heavy oil deposit on the stiffening plate and the bottom of transmission bell housing. (Planned to replace rear main seal and torque convertor seal this spring. Even purchased new genuine seals and two stage transmission jack.)
I used Slack-Tube Manometer to measure crankcase vacuum - it was normal 6” – 8”, so I did not suspect issue with inadequate crankcase ventilation. Also, no visible mayo under the oil cap.
This spring I was prepared to replace CCV components again as a preventative maintenance, but before ordering new parts, I decided to try (proof of concept) PCV mod. I followed “BavarianE39” instructions with few minor changes – utilized ends of old CCV lines to make installation completely “Plug and Play”. Also positioned PCV valve vertically. Changed oil (BMW 5W-30) and filter same day at 188900 miles on the odometer.
First impression – Noticeably better throttle response from the stop – I did not anticipate this and it was very welcome change.
This past Sunday marked 2200 miles since installation (191100 on the odometer). The oil level remained at the upper mark on the stick!!!
The stiffening plate and the transmission is bone dry!!!
I did not notice change in MPG
Conclusion – considering age and the mileage of my car I am not planning going back to stock CCV. And no more fear of hydro locking engine during winter!
If anyone interested to experiment with it – let me know and I will post pictures of my setup.

P.S. Cracked open old CCV – after 75k miles nothing clogged, reasonable amount of carbon buildup and rubber diaphragm appears to be in good shape. Checked dipstick return tube - it is not clogged. Go figure if anything is wrong with the stock system.
My son’s 2001-530i hydro locked engine in February 2013 with two-month-old CCV system. That car consistently consumed 1Qt per 900 miles before and after CCV replacement. Parked outside and driven to / from school 5 miles each way.

In response to the” Trader4” point about valve cover design – please compare attached images of valve covers from m30 (old BMW engine with basic crankcase vent system) and m54. Please note that I never took internal plates from any of these covers, so cannot elaborate on what is behind, but as you can see, both valve covers have some internal plates covering ventilation hole.
Attached Images
  
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  #37  
Old 06-09-2015, 04:04 PM
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^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?
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  #38  
Old 06-09-2015, 04:19 PM
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Quote:
Originally Posted by cn90 View Post
Since the CCV setup is very similar between M52 and M54, I think the oil consumption issue in M54 has more to do with the pistons rings etc. rather than the CCV thingy.
At one time we had three BMW vehicles with the M54 engine. All were driven by the same drivers, on the same roads, in the same ambient temperatures. All were purchased new and broken in the same way. All used the same oil. The E53 consistently used more oil, over several years of concurrent comparison. The only difference was that it was a heavier vehicle. The engine was working harder. (Which incidentally meant that it warmed up faster). In terms of oil consumption, I don't think CCV design had anything to do with it.
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  #39  
Old 06-09-2015, 08:51 PM
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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.
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  #40  
Old 06-09-2015, 08:56 PM
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Also, I changed the oil filter housing gasket shortly after I got the vehicle in 2010. At that time there was no burned oil smell, just a lot of leaking at the plate access hole for the oil drain plug. Yes, it could be leaking again!
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