Hello all, There are probably plenty of topics like this, however, I went through many others, read them, watched videos, and I found 1 thing that seems legit, but nobody mentions it. I would like to know more and what is the real truth. The intro to the topic, very well summarized: link I came across an interesting video that might help clarify things further. Maybe you can teach me more about it. Below, I’m sharing a video along with another one that explains the topic in more detail: Video 1 (pros & cons of using OCC) Video 2 (what is PCV and why it exists) I’ve spent a lot of time reading posts, browsing forums, and watching videos to determine which Oil Catch Can (OCC) brand would be the best choice. The first video reinforced what I had already learned but also introduced some potential downsides of using an OCC. It seems that the impact might depend on the type of filter used. But I'm not the expert and maybe someone else can explain it better or fix my misunderstanding. The video explained in TL;DR: The PCV is here to help us reduce the pressure in the crankcase. As there is no obstacle in the hose coming from the crankcase, the air and possibly the blow-by can go out freely without obstacle or back pressure. Adding something like an OCC, longers the distance traveled more than expected, possibly adding back-pressure/obstacle by adding a stiff filter in it (bronze filter?). As the video describes, the filter is not the thing that separates the oil from the vapor, but the cooldown of the air is. To cool the air down, it is possible to do it by slowing it down using a filter or anything in the way. Removing and cleaning air coming back to the engine works. However, it also prevents the expected functioning of PCV by adding an obstacle. The blow-by eventually escapes the crankcase, but not as fast as expected as there is an obstacle that slows it down, so it can contaminate the oil in the crankcase by staying there longer. To sum it up, I was thinking, if this all is true, how to solve it. Because based on this information, the downside of the OCC is stronger than the benefit of it. Maybe I have to get more information on what filters Billet, UPR, or any EU brand (cuz I live in the EU) use to not create an obstacle for the blow-by on the way out from the crankcase. Also, I'm not 100% sure how CFM Breather figures in this discussion, if it can help anyhow to solve the issue. If anyone has information on this topic, I would appreciate it! Thank you!
So I guess those of us with OCC's will be removing our dipsticks and checking for oil spewing from tube while running?
Me too, but I can't check my turbo applications cause they have electronic oil level monitoring. I doubt my cans are restrictive enough to be creating an issue.
Inline 6 gas injected BMW's. Going to try removing fill caps and see if there's any undue pressure escaping.
I once had a Sprinter that could check the oil level from the dash, luckily it still had a dipstick. I am hearing the Hurricane 6 has no dipstick as well? Maybe an manometer, test with factory PCV tube, and catch can. I haven't blown any seals on my GTDI van, been using a can for about 60k miles.
Thete are many good and false reports on the web about catch cans, but after using them on 3 of my autos it is a fact that they do work great. I have about 2-3 ounces of oil on mine at every 3k miles. I would rather catch it than have it going into the intake manifold.
Not enough resistance on the two I checked Saturday (not actually filtered but deep chambered) to be causing an issue (but are collecting oil).
The last thing you wany is an oil mist collecting and burning on the bach side and stem of the intake valves and the oil sludgh on the instde of the intake manafold.
