Engine Oiling System

Lubrication is dry sump type. Two independent oil pumps provide for pressure and suction in system. Pressure pump takes oil from externally mounted oil tank, and forces oil through passages to main, connecting rod and intermediate shaft bearings.

Camshaft bearings are oiled by external oil lines leading to camshaft housing. Oil splashes against valve cover to drip on rocker arms and valve stems. Suction pump takes oil from sump through strainer and forces it through oil filter to oil tank.

Oil from lower part of camshaft housing is returned to crankcase by oil return pipes. Pressure is controlled by 4 separate valves. At low temperatures, a thermostatically controlled valve directs oil to engine. At higher temperatures, oil first flows through cooler and then to bearings.

A pressure and relief valve directs oil into crankcase if pressure rises above 76.9-99.6 psi (5.4-7.0 kg/cm² ). Additional safety and by-pass valves are built into the system to prevent damage from excess pressure.