Oil Pressure

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Oil pressure is 5 psi (.35 kg/cm² ) at idle, and 25-80 psi (1.8-5.6 kg/cm² ) at 3000 RPM. Rocker arm shafts are hollow and are used as lubrication oil ducts. See Fig 1 or Fig 2 .

Fig 1: Cross-Sectional View Of Engine Block Oil Circuit

Courtesy of CHRYSLER CORP.

Fig 2: Cross-Sectional View Of Cylinder Head Oil Circuit

Courtesy of CHRYSLER CORP.