DIY Solution to M54-M52TU CCV problems

[80stech]

@fifty150 try running with oil level at the low mark.

[Fifty150hs]

Originally Posted by 80stech

@fifty150 try running with oil level at the low mark.

Curious why you think that might have an effect?

[docnabimmer]

Originally Posted by 80stech

@fifty150 try running with oil level at the low mark.

I would be curious why as well?

[docnabimmer]

Originally Posted by cn90

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

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

- Aug. 2020: 135K miles: oil consumption ---> nothing at 5K oil change interval.

FYI: if you remove the PCV valve and connect the hoses directly using a simple metal reducer, the crankcase vacuum will be excessive and you will hear a loud hissing vacuum noise (very scary sound), been there done that and posted in this thread. So far, I am very happy with this mod. This mod using the Duralast PCV valve definitely increases the vacuum to the "correct" amount.

I will remove the Duralast PCV valve for inspection and photo for the group soon.

In many cars, this kind of PCV valve *should be* replaced every ___ yr/miles.
Does anyone here know the proper interval for let's say Duralast generic PCV valve as in this mod?

thanks Cn90 ,-about the PCV - i have no idea what the interval is but , if it was me i would replace it yearly cause its inexpensive and easy to access and RR.Are you still running same set up that uses the 2 ports on the manifold?
wonder if Bave39 still around....

@fifty -thank you for the input , hope you sort that oil consumption soon

[Fifty150hs]

Originally Posted by docnabimmer

thanks Cn90 ,-about the PCV - i have no idea what the interval is but , if it was me i would replace it yearly cause its inexpensive and easy to access and RR.Are you still running same set up that uses the 2 ports on the manifold?
wonder if Bave39 still around....

@fifty -thank you for the input , hope you sort that oil consumption soon

Thanks doc so do I. I'm going to let it go a little longer and see what happens. If it keeps up my last ditch effort is to try the ERR treatment to ungunk/unstick the ring packs.

[80stech]

I'm pretty sure the marks on the dipstick are wrong (on mine anyway) and the oil level is far to high on the full mark, causing the crank to dip into the oil. It may have been done intentionally to create the vacuum break for the CCV system but results in too much splash on the cylinder walls and a lot more oil going up against the rear main seal. As far as the "Mod" goes. If you understand how the systems work you will realize how much luck is involved by having it work by just following the instructions in this thread about the "dynalast valve" .

The dynalast valve does not control anything about the "amount" of vacuum in this case. Using only the one port instead of both probably has more of an effect and points out even more about what is unknown by people following this blindly.

[Fifty150hs]

Originally Posted by 80stech

I'm pretty sure the marks on the dipstick are wrong (on mine anyway) and the oil level is far to high on the full mark, causing the crank to dip into the oil. It may have been done intentionally to create the vacuum break for the CCV system but results in too much splash on the cylinder walls and a lot more oil going up against the rear main seal. As far as the "Mod" goes. If you understand how the systems work you will realize how much luck is involved by having it work by just following the instructions in this thread about the "dynalast valve" .

The dynalast valve does not control anything about the "amount" of vacuum in this case. Using only the one port instead of both probably has more of an effect and points out even more about what is unknown by people following this blindly.

If mine continues with the results I've got I will probably put the stock CCV system back in it. No sense running a mod if it doesn't do anything.

[docnabimmer]

Originally Posted by Fifty150hs

If mine continues with the results I've got I will probably put the stock CCV system back in it. No sense running a mod if it doesn't do anything.

I dont blame you, ...If you do get this sorted, you can then have an M56 valve cover MOD which makes it easier to remove and replace the CCV system with a russian membrane and a Paraklas CCV cover and get rid of the old system which is a pain to remove and replace....

Im keeping the Bave39 MOD as it has "cured" my oil consumption.

[cn90]

- This mod is about reducing INTERNAL oil consumption.

- It is NEVER intended to reduce EXTERNAL oil leak. Although it is a potential theory in things such as oil pan gasket or RMS leak, NOT proven yet.

[Fifty150hs]

Originally Posted by cn90

- This mod is about reducing INTERNAL oil consumption.

- It is NEVER intended to reduce EXTERNAL oil leak. Although it is a potential theory in things such as oil pan gasket or RMS leak, NOT proven yet.

My external leaks are miniscule. I don't have drips under the car. My usage is internal. If my usage was from external leaks I'd have a lot of oil under my car and I don't.