Disassembly and Reassembly

DISASSEMBLY





Disassemble oil pump as shown in figure.

CAUTION: Do not remove oil pump sprocket or bolt. Otherwise, oil pump sprocket and/or oil pump rotor shaft might be damaged.

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








^ 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 oil pump assembly.
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. If clearance exceeds its limit, replace oil pump assembly.
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. Assemble oil pump. After assembling oil pump check to be sure that rotor turns smoothly by hand.
Tightening Torque (a): 12.0 Nm (1.2 kg-m, 8.5 ft. lbs.)