TM10-3950-672-24-2
Lubricating System
Lubricating System Flow
Lubricating Oil Pump
The engine use gerotor type oil pumps (1). The machined cavity in the block is the same for all engines. A wider gerotor
is used in the six cylinder engine to increase the pump capacity. Consequently, the pumps are not interchangeable.
Pressure Regulating Valve
The pressure regulating valve (2) is designed to keep the oil pressure from exceeding 414 kPa [60 PSI]. When the oil
pressure from the pump is greater than 414 kPa [60 PSI], the valve opens uncovering the dump port so part of the oil is
routed to the oil pan. The minimum and maximum oil pressure limits is the same for the four cylinder and the six
cylinder engine. Because of manufacturing tolerances of the components and the oil passages, the oil pressure can
differ as much as 69 kPa [10 PSI] between engines.
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