Procedures

Legend
1. Oil seal
2. Oil pump cover
3. Outer rotor
4. Inner rotor
5. Cotter pin
6. Oil pressure spring seat
7. Oil pressure spring
8. Oil control plunger
9. Oil pump body
DISASSEMBLY / ASSEMBLY
1. Disassemble in the order shown in the image, referring to Disassembly Note.
2. Assemble in the reverse order of disassembly, referring to Assembly Note.






Disassembly Note
Oil seal
Remove the oil seal by using a screwdriver protected with a rag.






INSPECTION
Oil Pressure Spring
1. Inspect the spring for weakness and breakage.
2. Measure the free length. Replace the spring if necessary.
Free length: 45.94 mm (1.809 in )






Rotor Clearance
Measure the following clearances. Replace the rotor or the pump body if necessary.
Tooth tip clearance:
Standard: 0.02 - 0.18 mm (0.0008 - .0070 in )
Maximum: 0.2 mm (0.0079 in )






Outer rotor-to-pump body clearance:
Standard: 0.09 - 0.18 mm (0.0036 -.0070 in )
Maximum: 0.2 mm ( 0.0079 in )





Side clearance:
Standard: 0.03 - .12 mm ( 0.0012 - .0047 in )
Maximum: 0.14 mm (0.0055 in )






Assembly Note:
Oil seal
1. Apply clean engine oil to the new oil seal.
2. Install the oil seal into the oil pump body by hand.
3. Press the oil seal into the oil pump body by using the SST.






Inner and outer rotor
1. Apply clean engine oil the friction surface of the pump body and the rotors.
2. Install the inner and outer rotors into the oil pump body with the marks aligned as shown.