Xoutpost.com - DIY Solution to M54-M52TU CCV problems

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Xoutpost.com (https://xoutpost.com/forums.php)

- X5 (E53) Forum (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/)

- - DIY Solution to M54-M52TU CCV problems (https://xoutpost.com/bmw-sav-forums/x5-e53-forum/99551-diy-solution-m54-m52tu-ccv-problems.html)

Bmwe5320023.0

07-02-2023 02:39 AM

Quote:

Originally Posted by 80stech (Post 1231035)

Yes, there must be a leak somewhere. There is absolutely no way that a PCV is regulating the vacuum in the crankcase to 1".

Actually I forgot that I swore to myself never to post again in this ridiculous thread!

:beerchug::rofl:

Bmwe5320023.0

07-02-2023 02:41 AM

Quote:

Originally Posted by Fifty150hs (Post 1231036)

Catch can is sealed with an O ring. If I had a vacuum leak I'd be throwing codes. I'm not. The line essentially runs from the valve cover, through the catch can and into the intake manifold. When I first tested before the mod I got 1/2" hg vacuum. The system is definitely working as I get oil in the catch can. If I tested vacuum by porting directly into the intake manifold I would expect 17" or more.

Gotta drill the cap haha! I'll post results...

Bmwe5320023.0

07-04-2023 03:00 AM

Was also thinking if anyone considered a vacuum adjustable valve?
Control Devices VR Series Brass Vacuum Relief Valve, 0-30" Hg Vacuum Range, 1/4" Male NPT https://a.co/d/2Qi4gNR

80stech

07-04-2023 10:36 AM

Something like a propane regulator would probably work nicely to regulate crankcase vacuum but on the fresh air side NOT on the vacuum side. The Wagner adjustable PCV valve in place of the 'magic' PCV valve listed in this thread is a better option as well. If memory serves, the E30 and others used full vacuum on the crankcase with only flow limited by an orifice. I think I have said most of this before but either way I'm done now.

Bmwe5320023.0

07-07-2023 06:59 PM

https://i.ibb.co/gjRJnJs/20230707-164105.jpg https://i.ibb.co/nfmKDH2/Screenshot-...126-Torque.jpg

Valve cover pressure around 10 in Hg when vehicle is idling. Not a huge draw I think. Drove the vehicle for maybe 500km and the oil still dropped from full mark to min mark on the dipstick

Fifty150hs

07-07-2023 09:24 PM

Quote:

Originally Posted by Bmwe5320023.0 (Post 1231186)

And that is why I put a catch can into the system. Oil is still getting pulled out of the crankcase. If the vapors go through a catch can you can return it to the crankcase. That said, from full to low in 500 km is a huge loss of oil. That's a liter. Even when I had a bad CCV and I was burning a lot of oil, the most I used was a liter in 600 miles. That was half your usage and I was getting smoke out of the tail pipe. With your kind of usage you should be too, or you should have a big puddle under your engine.

Bmwe5320023.0

07-08-2023 01:19 AM

Definitely nothing leaking, so I'm not sure where the oil went lol. I'm gonna test again to make sure.
I also ordered acdelco top engine cleaner, so maybe it will help with bad rings

Bmwe5320023.0

07-11-2023 09:58 PM

Alright one more update, made sure engine oil was at max and drove 500km.
Came back and checked again, and the level is full!
So I think this mode is working well. Will see how it holds over time.

cn90	07-12-2023 12:01 AM

Another update...

Long-term report on 2006 X5 3.0i 6sp MT...

- Nov. 2016: 122K miles: oil consumption ---> 1qt/400 miles.

- July 2023: 143K miles: oil consumption ---> nothing at 5K oil change interval.

Bmwe5320023.0

07-12-2023 04:21 AM

Legendary!

Only 21k miles in 7 years??

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