Nissan 370Z Forum - View Single Post

phunk · 12-26-2011, 02:28 PM

i was just referring to an oil catch can, not the fact that they appear to be combined.

oil catch cans really dont do anything, especially in the typical configuration that 99% of them are constructed. most of them are just plain tanks plumbed inline to the existing PCV system, and many people end up plumbing them in a way that is going to make the PCV system disfunctional.

the majority of the oil in the PCV system is in a vapor form. That is how it is able to leave the baffled valvecovers to begin with. the catch tank will remove minimal oil from the PCV system... its really just a function of the surface area inside of it happening to catch some. If the goal is to take oil out of the PCV because you dont like it coming back into the intake, then a catch tank is a failboat. You need a real seperator in there to catch the oil.

But really, I dont see the point in all that drama and mess in the engine bay. A ton of oil through the PCV system isnt helpful, but if youre having issues with that in the VQ then your problems are probably much deeper rooted.

12-26-2011, 02:28 PM	#11 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	i was just referring to an oil catch can, not the fact that they appear to be combined. oil catch cans really dont do anything, especially in the typical configuration that 99% of them are constructed. most of them are just plain tanks plumbed inline to the existing PCV system, and many people end up plumbing them in a way that is going to make the PCV system disfunctional. the majority of the oil in the PCV system is in a vapor form. That is how it is able to leave the baffled valvecovers to begin with. the catch tank will remove minimal oil from the PCV system... its really just a function of the surface area inside of it happening to catch some. If the goal is to take oil out of the PCV because you dont like it coming back into the intake, then a catch tank is a failboat. You need a real seperator in there to catch the oil. But really, I dont see the point in all that drama and mess in the engine bay. A ton of oil through the PCV system isnt helpful, but if youre having issues with that in the VQ then your problems are probably much deeper rooted. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph Last edited by phunk; 12-26-2011 at 02:32 PM.