Disassembly and Reassembly

DISASSEMBLY





^ Disassemble oil pump as shown in figure.

INSPECTION
^ Check outer rotor, inner rotor and oil pump cases for excessive wear or damage.
^ Check relief valve 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.





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

Radial Clearance
Check radial clearance between outer rotor and case, using thickness gauge.
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 and thickness gauge, measure side clearance.
Limit on side clearance: 0.11 mm (0.0043 inch)

ASSEMBLY
1) Wash, clean and then dry all disassembled parts.
2) Apply thin coat of engine oil to inner and outer rotors, and inside surfaces of oil pump case.
3) Install outer rotor to pump case No.1.





4) Install relief valve, relief spring and retainer to oil pump case No.2.
Tighten retainer to specified torque.
Tightening Torque (a): 29 Nm (2.9 kg-m, 21.0 ft. lbs.)
5) Install oil pump case pins to oil pump case No.2.





6) Assemble oil pump. After assembling oil pump check to be sure that rotor turns smoothly by hand.
Tightening Torque (a): 12 Nm (1.2 kg-m, 9.0 ft. lbs.)