Oil Catch Can DIY [OBX-RCT003]

[rocketstarter]

haha you want an honest answer?

[timot_one]

I do.  Tell us the truth.

[suleman_manji]

I'd also want to know.

[rocketstarter]

3k and not a drop. Makes me wander where the PCV valve vents to. Cause I have to be missing something.

[seththekorean]

yeah, to be honest, my breather filter( matt i know you hate it) isnt oily at all from the crankcase. I dont think its changed colors for about 3.5k

[exelr8]

seth you really need a catch can with that filter arent you just blowing oil all over your engine bay?

[stirfriedferret]

So I see that you used the pcv tube for the oil return...  There's some issues that come with doing that, but at the same time I'm not exactly sure if our engines have a second means of releasing trapped air inside the crankcase. If someone can elaborate, that would be nice.

[rocketstarter]

So I see that you used the pcv tube for the oil return...  There's some issues that come with doing that, but at the same time I'm not exactly sure if our engines have a second means of releasing trapped air inside the crankcase. If someone can elaborate, that would be nice.

pcv tube for the oil return? issues with the tubing? elaborate.

As far as I know the PCV [positive crankcase ventilation] valve is responsible for the second means of blow by release. However I don't know where it actually vents to.

[stirfriedferret]

Sorry... I was wondering where the built up pressure within the crankcase would vent to since you took the breather tube and hooked it up to the oil catch can. That breather tube normally goes to the intake tube where the built up air would be sucked up and recycled. Without that, I imagine that the air pressure would just build up inside of the crank case and the weakest part would break (probably some of the tubing on the oil catch can or the fittings on it). Maybe it's just me, but I don't think there's a second means of blow by release within the crankcase in our engines.

Edit: Now, I see something that I didn't notice before. You know that tube that's on your intake? (The one between the maf sensor and the TB)  Where does that go to?  That's the tube that's supposed to go to the breather tube that's on the valve cover. Maybe I'm wrong and there is a second means of letting air escape from the crankcase. Time to go investigate!

[seththekorean]

seth you really need a catch can with that filter arent you just blowing oil all over your engine bay?

No, i cant even tell you how long I've had it with no problems. or even a trace of an oil spray. even on the flame retardant hood thing. where its usually evident (esp on turbo cars)

but as to stirfriedferret. If you're saying he has no vacuum pulling pressure out, he does; the tube goes from the crankcase to the catch can which then goes to the intake. so the intake is pulling the clean air out of the catch can keeping a vacuum.

[stirfriedferret]

Ah, alright. Thanks, Seth. You answered my question

[rjp6262]

hell i may end up doing this..but i may put the catch can closer to the PCV opening. just in case the amount of tubing has an effect or something.

but i'll need to see if it actually catches anything. if it doesn't then im not doing it. another reason why you may not see the oil that is being caught is there needs to be a significant amount of oil in that can to actually show on the side thing. just a thought.

[rocketstarter]

hell i may end up doing this..but i may put the catch can closer to the PCV opening. just in case the amount of tubing has an effect or something.

but i'll need to see if it actually catches anything. if it doesn't then im not doing it. another reason why you may not see the oil that is being caught is there needs to be a significant amount of oil in that can to actually show on the side thing. just a thought.

unscrewed the bottom and no oil. Amount of tubing doesn't play a role since the walls are reinforced and the motor doesn't produve enough vacuum for it to collapse.

[rjp6262]

oh i see. oh well lol maybe, maybe not.

[timot_one]

Okay, I finally looked at the pictures a little closer this time and read through everything.  The reason why you're not getting any oil, is because you have this connected to the breather port on your valve cover.  Oil catch cans are to be used with your PCV (Positive Crankcase Ventilation) valve.  That is located on the front of your engine block, by your water pump.  I'm getting a catch can soon, so I'll take some pictures to show you where it should be connected to.