This thread was created to provide basic and how to information on OCC as well as discussion or issues that may arise. Keeping all OCC discussion in one place benefits us all!
What is an Oil Catch Can?
An oil catch can is used in turbo applications, or high-performance race applications where excessive blow-by (leakage past the piston rings) of air and fuel vapor occurs. This creates a positive pressure in the crankcase. Engine manufactures have placed a valve on the engine block which releases this pressure. This valve is known as a PCV (Positive Crankcase Ventilation) valve.
During engine operation, blow-by gases, as well as oil mist from the rotating components of the engine, pass through the PCV valve and are routed back into the intake for the engine to burn off. However, some of the oil mist and other products settle along the engine intake and over time form a "gunk." The oil catch can collects the oil mist and condenses the fuel vapors while allowing "cleaner" gases to be passed back into the intake.
Typically the blow-by gasses are passed through a wire mesh, which give the vapor droplets something to adhere to. Since the oil catch cans condense the vapor portion of the gasses, they will need to be drained periodically of all the oil, fuel and other contaminants.
*PICTURE IS FOR REFERENCE ONLY.*
Here's a pic of wha the OCC looks like on the inside to make it effective:
Install Links
http://www.mazda3forums.com/index.php?topic=131262.0
http://www.mazdas247.com/forum/showt...-tons-of-pics.
http://www.mazdaspeedforums.org/foru...ons-pics-7216/
http://www.jamesbaroneracing.com/sup...structions.pdf
Things to Note
Install Review
Update