Blowby Oil Vapor - ROAD DRAFT TUBE "CATCH CAN" possible damage

[RWS]

Currently running mechanical diesels with an "open" blow-by design.

Yanmar 6 LP series

Crankcase blow by from the valve train area is simply piped to the air cleaner area

As engine RPM increases, these vapors are sucked onto the air filter media and then into the engine where they coat the intercooler and turbo blades.

The aftermarket has come up with a number of "CATCH CANS" that coaless these vapors back into a liquid that can be drained out from time to time. I have one on my 420 HP Ford Mustang and am quite happy to drain out this nasty crap every couple of months. The Mustang is a closed system, meaning it has a PCV valve. The Yanmar is a simple open system.

In adding the catch can I fear I will restrict the flow of blow-by air/fumes with this restriction, allowing pressure to build up in the valve cover.

Any ideas on how to avoid this, or simply leave well enough alone?

The blowby vapors do in fact make the air filters nasty, also likely doing no good to the intercooler and turbo blades.

Moroso offers such a unit and Raycor has one for marine usses part # ccv4500

Comments?

RWS

 

[abalmuth]

Sounds like a good solution and if it were me I'd go with the Raycor Marine unit.
Not to take away anything from Moroso, as they are a fine aftermarket manufacture, but Raycor/Parker H. is OEM with so many marine applications i cant see any downside to using them

 

[boatbum]

I'd call up Walker and check them out. In use on MANY engines. Yanmar is included in their supported list of engines. I picked one, there are many other supported Yanmar models. The Airseps drain the oil back to the crankcase.

Walker Engineering - Product Detail

The Walker Airsep--the only factory installed, closed-crankcase, no maintenance breathing systems for Detroit Diesel, Caterpillar, Cummins, Deutz, Lugger, and other diesel engines. Custom air filtration systems available.

www.walkerairsep.com

 

[The Other Gary]

I have the Racor CCV 4500 and matching Air Cleaners on my Cummins 5.9 TBA engines for the last
8 years. It is far superior to the Walker system I removed. I change the 4500 filters every year and also wash the
air cleaner elements annually. The puke hose from the CCV 4500 to a bottle has yet to collect any runoff so I have never
bothered to route it back to the crankcase.
Sold on this system.