Oil Pump Cleaning and Inspection
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Oil Pump Cleaning and Inspection
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1.
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Clean the oil pump components with non-corrosive solvent.
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1.
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Note
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There are no serviceable components within the oil pump. Disassemble the pump only to diagnose an oiling concern. A disassembled oil pump must not be reused. A disassembled oil pump must be replaced.
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Inspect the oil pump housing for the following:
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Damage, scoring, or debris on the housing surface for the driven gear (1)
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Damage to the oil pump mounting bosses (2)
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Damage, scoring, or debris on the housing surface for the drive gear (3)
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Damage, scoring, or debris in the oil pump relief valve port (4)
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Damage, scoring, or debris in the oil pump intake port (5)
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Damage, scoring, or debris in the oil pump relief valve bore (6)
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Damage, scoring, or debris in the oil pump output port (7)
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Damage to the threads in the oil pump housing for the oil pump cover bolts (8)
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2.
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Inspect the oil pump cover for the following conditions:
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Damage to the oil pump cover mounting bosses (1)
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Damage, scoring, or debris in the oil pump cover oil passages (2)
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Damage to the sealing surface between the oil pump cover and the oil pump housing (3)
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3.
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Inspect the inner drive gear for damage. If inner diameter damage is found, ensure the crankshaft is also inspected.
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4.
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Inspect the outer driven gear for damage.
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5.
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Inspect the oil pump relief valve components for debris or damage.
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6.
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Inspect the primary camshaft drive chain lower guide for damage (1-3).
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7.
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If debris or damage is present within the oil pump, further inspection of all of the engine components is necessary.
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