DIY Solution to M54-M52TU CCV problems

[tahoechallenger]

I use a catch can too. I have been using a pcv valve for a year and about 20 thousand miles. There has been zero oil consumption and no negative effects.

[ix&x5]

I will be doing this mod, does anyone have a picture of the "catch can" added to this system? Thanks

[tahoechallenger]

Let's see if this works:

[1iwilly]

ok some guys are using catch can others not the ones not using it say that they use no oil or see residue on tail pipe like with the ccv or have to add oil so why the need for the can.??

Originally Posted by ix&x5

I will be doing this mod, does anyone have a picture of the "catch can" added to this system? Thanks

[Ricky Bobby]

Catch cans in my opinion are moisture collectors.

[tahoechallenger]

I posted a photo of what I drain out of the catch can every 6 weeks or so. If there was no catch can that 4 ounces of oil and water would be sucked into the cylinders and burned with gas. Oil mixed with gas lowers the octane and can lead to misfires. The knock sensor would detect the misfires and reduce timing. The timing reduction leads to less fuel economy. Also that oil and water mix would leave deposits on the top of the piston and exhaust valve. Those deposits also can cause misfires.
The catch can is not necessary for the application, but for $100 I think it is worth it.

[1iwilly]

wow you paid $100.00 look at this for $15.00=
Billet Aluminum Racing Engine Oil Catch Reservoir Tank Can Hose Indicator Black | eBay

[BavarianE39]

Originally Posted by 1iwilly

ok some guys are using catch can others not the ones not using it say that they use no oil or see residue on tail pipe like with the ccv or have to add oil so why the need for the can.??

I guess it's all personal preference, the catch can definitely won't hurt anything, mine has been running as is without one and I surely don't have black tail pipes like I did before the delete. I'm going to keep mine absolutely the same just to be a Guinea pig and see what and when will fail first. So far everything is working as intended.

And as far as the $100 vs $15 catch can goes, the Mishimoto one is very well engineered with internal baffles that are very good at separating oil from air vapors. They are a very popular upgrade with the BMW N54 crowd.

[1iwilly]

ok the way i'm going to do mine is take the drain plug out from the bottom of catch can put a on and off valve then at other end a hose running to oil dipstick tube so when can is full i open valve the oil drains back to engine just my thoughts simpler way of getting rid of the oil look at pic of sample valve

[tahoechallenger]

I don't think that is a good idea. You don't want to put the oil water mix back into the engine. The oil stays a lot cleaner with the catch can. You will see for yourself the first time you drain it!