Diesel Engines

System consists of a sealed oil filler cap, a calibrated orifice, a water separator, and vacuum lines. Separator is located on intake pipe, in air filter, or at back of carburetor on intake pipe.

The blow-by gases and crankcase vapors from the engine flow to the water separator, which on some models, is located on the clean side of the air filter. Water and impurities settle on the walls of the separator.

Engine vacuum draws the condensation and blow-by gases through the calibrated orifice where they join with the air/fuel mixture and enter the combustion chambers.

During lower and partial load range operation, additional clean air is drawn into the engine due to high intake manifold vacuum and depending on the accumulation of condensate and blow-by gases. In the upper load range, the blow-by gases and crankcase vapors flow directly to the clean air side of the air filter where they are drawn, along with intake air, via the carburetor into the combustion chambers.