DIY Solution to M54-M52TU CCV problems - Page 30

Fifty150hs · #1 06-30-2023, 09:45 PM

Quote:

Originally Posted by Bmwe5320023.0

Here's my test. So I just measured directly at the hose that goes into the distribution box that's connected to the manifold.
So manifold is pulling 16-17 inHG instead of 0.48 inHG?
Does the original CCV system then blocks the vacuum at the diaphragm and doesn't let it pull so much from valve cover?
I guess to confirm all we need to do is have someone with the stock CCV system measure the vacuum?
Which is probably going to be like bmw says 0.48inHG?
So on this case it's true, the vacuum with this mod is 30 times stronger.
Now how much vacuum is safe for the seals?
Just for fun I sucked on that gauge as hard as I could, and it showed 23 inHG lol! So it relative terms that I can relate to, it's not that much suction...

But it's probably enough to stop the oil consumption...
Here's CN90's picture, numbers are just examples.
BTW I wonder if CN90 is still around with thus mod?

Fifty150hs I think your mode is a bit different because you installed a catch can??

Mine is pretty much the same except the catch can is in line between the output of the PCV valve and the return into the intake manifold. The Cn90 mod runs the hose from the PCV outlet directly to the intake manifold. The catch can in my system just extends the hose from the PCV outlet and the inlet to the intake manifold. No difference in vacuum.

Fifty150hs · #2 01-05-2021, 05:08 PM

I have 6000 miles on this mod. I did it with a catch can. The catch can does catch oil, so this mod doesn't completely eliminate oil usage. That said, I'm 4000 miles since my last oil change and have only used about 1/2 liter. If I go to my next oil change at 5000 miles without adding oil I will consider this mod a complete success. I already consider it a very good mod. I haven't received any SES for STFT. I get the odd LTFT SES for too rich in one bank, but I was getting those before the mod.

docnabimmer · #3 01-06-2021, 11:21 AM

Quote:

Originally Posted by Fifty150hs

I have 6000 miles on this mod. I did it with a catch can. The catch can does catch oil, so this mod doesn't completely eliminate oil usage. That said, I'm 4000 miles since my last oil change and have only used about 1/2 liter. If I go to my next oil change at 5000 miles without adding oil I will consider this mod a complete success. I already consider it a very good mod. I haven't received any SES for STFT. I get the odd LTFT SES for too rich in one bank, but I was getting those before the mod.

glad that it worked out for you fifty!!!
you mind posting pics of your SET UP?

Fifty150hs · #4 01-06-2021, 11:12 PM

Quote:

Originally Posted by docnabimmer

glad that it worked out for you fifty!!!
you mind posting pics of your SET UP?

I'll get some in the next couple of days. I thought I already had some, but I can't find them.

Fifty150hs · #5 02-24-2021, 10:54 PM

Quote:

Originally Posted by docnabimmer

glad that it worked out for you fifty!!!
you mind posting pics of your SET UP?

Here's some pics. Sorry it took so long. Have been chasing some other problems on my truck. Finally got a chance to get some. My latest oil consumption has been quite good compared to how it was. There is a caveat however. Since my last oil change I've been doing about 95% around town driving with a little freeway. This normally results in lower oil usage on its own. Because of that I don't consider this a total validation of this mod. It is a very good sign though.

I'm about 500 miles from my 5000 mile oil change being due and I have only used 1 liter of oil. I've never had oil usage that low. Having the catch can allows me to recover oil that normally would have been burned, even with the PCV mod. Since the original mod doesn't call for a catch can I don't see how it really cuts down on oil consumption. I can say without a doubt putting a catch can in the system does.

docnabimmer · #6 03-03-2021, 01:47 PM

Quote:

Originally Posted by Fifty150hs

Here's some pics. Sorry it took so long. Have been chasing some other problems on my truck. Finally got a chance to get some. My latest oil consumption has been quite good compared to how it was. There is a caveat however. Since my last oil change I've been doing about 95% around town driving with a little freeway. This normally results in lower oil usage on its own. Because of that I don't consider this a total validation of this mod. It is a very good sign though.

I'm about 500 miles from my 5000 mile oil change being due and I have only used 1 liter of oil. I've never had oil usage that low. Having the catch can allows me to recover oil that normally would have been burned, even with the PCV mod. Since the original mod doesn't call for a catch can I don't see how it really cuts down on oil consumption. I can say without a doubt putting a catch can in the system does.

thanks for the pictures, i am running the conventional CVV set up for now .

Caryalon · #7 01-06-2021, 10:07 PM

I previously installed the catch can mod in my e39.

I have installed a M56 valve cover with integral CCV in my e53. This seems to work really well. I am not using much oil, and don't have to worry about the CCV under the intake manifold...

80stech · #8 02-25-2021, 02:23 PM

@ fifty150 -- you need to work on then baffling and/or the fitting that comes off the valve cover if you want to reduce the oil in the catch can. The original system had a cyclone oil separator which you disconnected when you did "the mod."

Fifty150hs · #9 02-25-2021, 03:25 PM

Quote:

Originally Posted by 80stech

@ fifty150 -- you need to work on then baffling and/or the fitting that comes off the valve cover if you want to reduce the oil in the catch can. The original system had a cyclone oil separator which you disconnected when you did "the mod."

I get that. That was kind of my point. The original mod doesn't do that. It does exactly what I did minus the catch can which is why I don't understand how the mod could actually reduce the oil consumption without a catch can.