Oil Pump - Porsche 928 1982 Service Information

ENGINE - Lubrication
Oil Pump
Up to now the oil return bore from the shaft
seal led into the intake end of the pump.
Because of this led, it had been possible for
the pump to take in air through the shaft
seal.
-. -
TO prevent this, the return flow bore in the pump body has been modified in such a manner
that oil can flow directly
into the oil sump.
The crankcase lower section
has a return bore in the
area of the suction bore for
the oil oumo.