I have a question for those that have installed catch cans on their VM Motori diesels. Do you actually catch any oil? If so, how much and how often?
The reason I ask is after reviewing service training manual that Milous uploaded in the premium member section, it documents a centrifugal oil separator device built into the crankcase ventilator system that routes cleaned air and allows oil to flow back into the crankcase.
The manual has a couple of diagrams that shows the centrifugal oil separator, baffles, and oil flow. Here is a quote from the manual:
"The 3.0-liter diesel engine uses a centrifugal oil separator to route crankcase gases to the intake manifold. The oil separator is attached to the left side intake camshaft. Crankcase gases flow through the front engine cover into the baffling machined into the front upper left engine cover. The vapors are routed to the fresh air inlet tube and liquid oil flows back down the baffles to the crankcase
So, if you have a catch can, does it actually catch any oil?
I would find it hard to believe that the relatively simple baffle system in an aftermarket catch can would catch more oil than the centrifugal system built into the engine.
Ordered 9 Aug 2013
: '14 Overland 4x4, Diesel, AdvTech, Off Road II, Block Heater
Unloaded From Railcar
11/10/2013 11:57 PM PST Mira Loma, CA