By enclosing the crankcase system of diesel engines, particularly older Detroit Diesel two-strokes, you'll keep your engine space and your bilges noticeably cleaner.
July 6, 2015
Keeping crankcase fumes in the engine where they belong lets you spend more time fishing and less time cleaning up oily residue.John Brownlee
Before the installation of Walker Airseps on the author’s Detroit Diesel 6V-92TAs, breather hoses channeled exhaust fumes from the valve covers back to conventional air filters. They were mostly ingested back into the engine, but some escaped into the engine room.John Brownlee
With the Walker Airsep system, the breather hoses go from the valve covers through a vacuum regulator to a collection canister attached to the turbocharger, thereby “closing” the crankcase system so residue doesn’t escape. The canister is the actual “Airsep,” and it separates the lube oil from the combustible gasses that make up the blowby from the engine. The gasses get routed back through the engine while the oil returns to the crankcase.John Brownlee
The hoses lead from the valve covers to the vacuum regulator, then into the Airsep.John Brownlee
The hose from the vacuum regulator to the Airsep gets attached.John Brownlee
The final step involved connecting a drain hose from the bottom of the Airsep to a fitting on the engine block. This allows all of the oil that would have ended up in your bilge to be returned into the engine instead. Thus, a closed system.John Brownlee