Oil Pump: Testing and Inspection

Oil Pump Inspection

Inspection





^ Check outer rotor (3), inner rotor and oil pump cases (1), (2) for excessive wear or damage.
^ Check relief valve (4) for excessive wear or damage.

NOTE: If any repair is required on outer rotor, inner rotor and oil pump cases, replace them as an assembly.





^ Measure free length and tension of oil relief spring.





Oil relief spring

^ Measure clearance of oil pump rotor and oil pump case.

Radial Clearance





Check radial clearance between outer rotor (2) and case No.1 (1), using thickness gauge (4).
If clearance exceeds its limit, replace outer rotor or case.
Limit on radial clearance between outer rotor and case 0.15 mm (0.0059 inch)


Side Clearance





Using straightedge (5) and thickness gauge (4), measure side clearance.
If side clearance exceeds its limit, replace oil pump assembly.
Limit on side clearance 0.11 mm (0.0043 inch)