Pump, Engine Oil: Operation
NOTE:
Pump cover removed for clarity.
The gerotor type engine oil pump is part of the oil pump housing. The oil pump is directly coupled to the crankshaft.
- Engine oil is drawn up from the sump through the oil pick-up tube (1).
- An internal mechanical plunger (2) and spring type pressure relief valve diverts excess oil from the pump outlet back to the pump inlet.
- The pressure controlled oil flows through the oil pump/oil filter housing interface (3) and into the oil filter housing.
- After the oil is filtered and cooled it travels back to the oil pump housing through the oil pump/oil filter housing interface (4) where it is routed to the main engine oil gallery (5).
The gerotor pump is not to be disassembled.
- The gerotor pump is a non-serviceable component of the oil pump housing and is replaced as a complete assembly.
- The pressure relief valve is serviceable and can be removed and inspected.