DIY Solution to M54-M52TU CCV problems

[Sroor9001]

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

[cn90]

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

[axgordon]

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!

[Sroor9001]

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 ?

[cn90]

- 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.

[cn90]

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?

[Joshdub]

cn90, have you read the thread where people add a vac line from the capped off port on the CCV to a capped off port on the back of the intake manifold?

I did and it reduced my consumption from 1qt per <1k miles to about <.25qt per 1k (averaged over the past 4k miles). I also have some seeping somewhere.

[bcredliner]

The majority of those that do some type of modification or workaround have a CCV system that is malfunctioning, in need of repair. IMO, if there is excessive oil consumption with a properly operating CCV system something else is the core cause.

Based on the mileage most of us have on our X5s it is quite likely we have or will experience CCV issues. I think the best fix is to clean or replace the CCV components rather than modify the system. If there was no excessive oil consumption for say the first 50,000+ miles I don't see the logic that the system is the problem and should be modified.

Oil consumption due to a faulty CCV system is often corrected by replacing the oil separator flap. In extremely cold areas there is a cold weather modification from BMW to address the freezing potential.

[Scott ZHP]

Originally Posted by bcredliner

The majority of those that do some type of modification or workaround have a CCV system that is malfunctioning, in need of repair. IMO, if there is excessive oil consumption with a properly operating CCV system something else is the core cause.

Based on the mileage most of us have on our X5s it is quite likely we have or will experience CCV issues. I think the best fix is to clean or replace the CCV components rather than modify the system. If there was no excessive oil consumption for say the first 50,000+ miles I don't see the logic that the system is the problem and should be modified.

Oil consumption due to a faulty CCV system is often corrected by replacing the oil separator flap. In extremely cold areas there is a cold weather modification from BMW to address the freezing potential.

I share this opinion.

I replace the CCV and all hoses and clean out the air distribution manifold about every 60k miles. Use the cold weather version of the CCV, the insulated hoses and if you live in a really cold area - retrofit the cold weather dipstick - it eliminates the baffle that gets clogged. At the same interval, I use a can of BG Products "EPR" (aka BG109) to keep the rings unstuck. I have 148k miles on my 3.0i/M54, bought it new, and it uses virtually no oil.

[cn90]

OK,

I am doing the BavarianE39's mod as we speak.

I am trying to understand why this mod works b/c:

1. I went to Autozone and got the Duralast PCV valve, I just double-checked the design:
a. Blew one way (toward I.M.), it flows.
b. Blew the other way, no flow.
Nothing special, this is the design of the PCV valve, which is basically "one-way street".

2. I also have a BMW CCV Valve lying around:
- Blocked the oil return port.
- Blew at port #2, air came out port #3.
- Blew the other way, no flow.

Don't get me wrong, I am doing the BavarianE39's mod but...

From an engineering standpoint, there is virtually no difference in the 2 designs (Mod vs Stock).
See photo below: vapor + oil is still sucked into the Intake Manifold, so why does this mod work?