Oil Pump: Service and Repair

Oil Pump Overhaul

Special Tools Required
^ Seal Driver 07LAD-PT3010A
^ Driver 07749-0010000
^ Attachment, 42 x 47 mm 07746-0010300

NOTE: Refer to the Exploded View as needed during this procedure.

Removal
1. Drain the engine oil.
2. Remove the timing belt and the balancer belt.
3. Remove the timing belt tensioner and the balancer belt tensioner.
4. Remove the CKP/TDC sensors, then remove the timing belt drive pulley.
5. Remove the balancer belt driven pulley.
6. Remove the balancer gear case and the balancer driven gear.
7. Separate the oil pan from the cylinder block with an oil pan seal cutter.





8. Remove the oil pan and the oil screen (A).
9. Remove the mounting bolts and the oil pump assembly (B).
10. Remove the screws from the pump housing, then separate the housing and cover.

Inspection





11. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and outer rotor (B). If the inner-to-outer rotor clearance exceeds the service limit, replace the inner and outer rotors.





12. Check the housing-to-rotor axial clearance between the rotor (A) and pump housing (B). If the housing-to-rotor axial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.





13. Check the housing-to-outer rotor radial clearance between the outer rotor (A) and pump housing (B). If the housing-to-outer rotor radial clearance exceeds the service limit, replace the set of inner and outer rotors and/or the pump housing.
14. Inspect both rotors and the pump housing for scoring or other damage. Replace parts if necessary.
15. Remove the old oil seals from the oil pump.





16. Gently tap in the new oil seals until the special tool bottoms on the pump.

Installation
17. Reassemble the oil pump, applying liquid thread lock to the pump housing screws.
18. Check that the oil pump turns freely.
19. Clean and dry the oil pump mating surface.





20. Install the oil pump (A).
^ 1 Apply liquid gasket, part No. 08718-0001 or 08718-0003, evenly to the block mating surface of the oil pump and to the inner threads of the bolt holes.
^ 2 Grease the lips of the oil seals and apply oil to the new O-ring (B).
^ 3 Install a dowel pins (c), then align the inner rotor with the crankshaft and install the oil pump.
^ 4 Clean the excess grease off the crankshaft and balancer shaft and check the seals for distortion.

NOTE: Do not install the parts if 5 minutes or more have elapsed since applying liquid gasket. Instead, reapply liquid gasket after removing the old residue.

21. After assembly, wait at least 30 minutes before filling the engine with oil.
22. Install the baffle plate (D).





23. Hold the front balancer shaft with a screwdriver (A), then install the timing balancer belt driven pulley (B).





24. Before installing the balancer driven gear (A) and the balancer gear case (B), apply molybdenum disulfide (C) to the thrust surfaces of the balancer gears as shown.





25. Install the balancer driven gear.
^ 1 Remove the bolt (A) and washer (B) from the maintenance hole (C).
^ 2 Scribe a line on a 6 x 100 mm bolt, 74 mm from the end.
^ 3 Insert the bolt in the maintenance hole and into the hole in the rear balancer shaft (D) up to the line you scribed.
^ 4 Install the balancer driven gear (E).





26. Install the balancer gear case (A).
^ 1 Apply clean engine oil to the new O-ring (B).
^ 2 Hold the rear balancer shaft with the 6 x 100 mm bolt.
^ 3 Align the notch (c) on the pulley edge with the pointer (D) on the gear case.
^ 4 Install the gear case (A).





27. After installation, make sure the pulley pointer (A) aligns with the oil pump pointer (B).
28. Clean and dry the cylinder block mating surfaces.





29. Apply liquid gasket, part No. 08718-0009, evenly to the cylinder block mating surface of the oil pan and to the inner threads of the bolt holes, then install the oil pan.

NOTE:
^ Apply a 4 mm wide bead of liquid gasket.
^ Apply a second bead where the two ends of the first bead ends meet.
^ Do not install the parts if 5 minutes or more have elapsed since applying liquid gasket. Instead, reapply liquid gasket after removing old residue.





30. Tighten the bolts/nuts in two or three steps. In the final step, tighten all bolts/nuts, in sequence to 12 Nm (1.2 kgf-m, 8.7 ft. lbs.)