Description

Engine Emission Control

OPERATION

Oil Separator
Piston blow-by gases are drawn through the oil separator into the engine air intake manifold and added to the air charge. The depression caused by the engine air intake draws gasses from the crankcase, through the separator and the hose into the air inlet manifold.
The resultant depression in the engine oil pan, front covers and cylinder head covers reduces the load on the joint seals in those areas. Engine oil drawn into the separator is collected on angled plates in the separator. The oil collects on the plates and falls back to the oil pan via a hole in the cylinder block.

Camshaft Cover Breather
Piston blow-by gases that enter the camshaft cover are drawn through the baffle valve and into the clean air low pressure intake duct by a venturi effect of the clean air passing the hose connection. Oil vapor is collected in the baffle valve and drains back to the cylinder head and the oil pan.

COMPONENT DESCRIPTION

Oil Separator
The oil separator is located on the LH (left-hand) side of the cylinder block. It is secured with 8 bolts and sealed with a gasket. A hose connects from the top of the separator and is routed into the intake manifold. The hose connection to the separator contains a PCV (positive crankcase ventilation) valve. The PCV (positive crankcase ventilation) valve is open at low throttle opening and closed and mid to full throttle openings.

Camshaft Cover Breather
The camshaft cover breather comprises a hose connecting the camshaft cover to the clean air low pressure intake duct from the air cleaner and a baffle valve located within the cover. This breather is known as the full load breather.