One goes from the cam cover to the intake and one goes from the crank case to the intake manifold. With no catch can installed, you have the potential to get build up in the intake manifold causing dirty valves and poor compression.Ī Mazdaspeed 3 has two PCV lines. There are also small amounts of condensation that get trapped in the crankcase and you don’t have to be a rocket scientist to know water and oil don’t mix.Īn oil catch can is designed to “catch” unwanted vapors that are in your crankcase and PCV system and prevent these contaminates from entering your motor. This excess air will cause pressure in the crankcase to slow down the pistons from going up and down and build up oil vapors that create frothing of the oil. There is a small amount of compression that is lost into the crankcase passing by the rings. When the engine is running, the pistons are happily moving up and down. Most understand the basics of what the OCC does, but want to know more about how our OCC does it.įor the last 20 or so years, all cars have had some sort of PCV system installed to re-burn unwanted vapors from your crankcase instead of venting them to the outside world.
Since the release of our Oil Catch Can we have had a lot of questions about how our set-up functions.
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