Oil Pressure

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Oil pressure is 5 psi (0.35 kg/cm² ) at idle, and 45-105 psi (3.1-7.3 kg/cm² ) at 3000 RPM. Rocker arm shafts are hollow and are used as lubrication oil ducts. See Fig 1.

Fig 1: Cross-Sectional View Of Engine Oil Circuit

Courtesy of CHRYSLER CORP.