Oil Pump: Service and Repair
Engine Oil Pump Overhaul
Exploded View
Removal
1. Remove the front wheels.
2. Remove the splash shield. Engine Removal
3. Remove the drive belt auto-tensioner. Removal and Replacement
4. Remove the cylinder head cover. Cylinder Head Cover Removal
5. Disconnect the positive crankcase ventilation (PCV) hose.
6. Remove the crankshaft pulley. Service and Repair
7. Support the engine with a jack and a wood block under the oil pan.
8. Remove the bolt (A) securing the A/C line, then remove the upper torque rod (B).
M/T model
A/T model
9. Remove the ground cable (A), then remove the side engine mount bracket (B).
10. Remove the oil pump.
Inspection
1. Remove the screws from the pump housing, then separate the pump housing and the pump cover.
2. Check the inner-to-outer rotor radial clearance between the inner rotor (A) and the outer rotor (B). If the inner-to-outer rotor clearance exceeds the service limit, replace the oil pump assembly.
Inner Rotor-to-Outer Rotor Radial Clearance
3. Check the pump housing-to-rotor axial clearance between the rotors (A) and the pump housing (B). If the pump housing-to-rotor axial clearance exceeds the service limit, replace the oil pump assembly.
Pump Housing-to-Rotor Axial Clearance
4. Check the pump housing-to-outer rotor radial clearance between the outer rotor (A) and the pump housing (B). If the pump housing-to-outer rotor radial clearance exceeds the service limit, replace the oil pump assembly.
Pump Housing-to-Outer Rotor Radial Clearance
5. Inspect both rotors and the pump housing for scoring or other damage. Replace the parts, if necessary.
6. Apply liquid thread lock to the pump housing screws, then install the oil pump cover.
7. Check that the oil pump turns freely.
Installation
1. Check the oil pump oil seal for damage. If the oil seal is damaged, replace the oil seal. Pulley End Crankshaft Oil Seal Installation (R18A1 and R18A4 Engine)
2. Remove all of the old liquid gasket from the oil pump mating surfaces, the bolts, and the bolt holes.
3. Clean and dry the oil pump mating surfaces.
4. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009 to the engine block mating surface of the oil pump, and to the inside edge of the threaded bolt holes. Install the component within 5 minutes of applying the liquid gasket.
NOTE:
- Apply a 3 mm (0.12 in) diameter bead of liquid gasket along the broken line (A).
- If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply new liquid gasket.
5. Apply liquid gasket to the engine block upper surface contact areas (B) on the oil pump, and the lower block upper surface contact areas (C) on the oil pump.
NOTE: Apply about 11 mm (0.43 in) diameter and about 3 mm (0.12 in) thickness of liquid gasket to the areas (B) and (C).
6. Apply liquid gasket, P/N 08717-0004, 08718-0003, or 08718-0009 to the oil pan mating surface of the oil pump, and to the inside edge of the threaded bolt holes. Install the component within 5 minutes of applying the liquid gasket.
NOTE:
- Apply a 3 mm (0.12 in) diameter bead of liquid gasket along the broken line (A).
- If too much time has passed after applying the liquid gasket, remove the old liquid gasket and residue, then reapply new liquid gasket.
7. Install new O-rings (A) on the oil pump. Set the edge of the oil pump (B) on the edge of the oil pan (C), then install the oil pump on the engine block (D). Loosely install the dowel bolts (E), then tighten the 8 mm bolts (F), the 6 mm bolts (G) and the dowel bolts. Wipe off the excess liquid gasket on the oil pan and oil pump mating surface.
NOTE:
- When installing the oil pump, do not slide the bottom surface onto the oil pan mounting surface.
- Wait at least 30 minutes before filling the engine with oil.
- Do not run the engine within 3 hours after installing the oil pump.
8. Install the side engine mount bracket (A), then loosely tighten the new bolt and nut (B), then loosely tighten the bolt (C).
9. Install the ground cable (D).
10. Remove the air cleaner assembly. Service and Repair
11. Loosen the transmission mounting bolt and nuts (A).
12. Raise the vehicle on the lift.
M/T model
A/T model
13. Loosen the lower torque rod mounting bolt (A).
14. Lower the vehicle on the lift.
15. Tighten the side engine mount bracket mounting bolts and nut.
16. Tighten the transmission mounting bolt and nuts.
17. Raise the vehicle on the lift.
M/T model
A/T model
18. Tighten the lower torque rod mounting bolt.
19. Lower the vehicle on the lift.
20. Install the air cleaner assembly. Service and Repair
21. Install the upper torque rod (A), then tighten the new upper torque rod mounting bolts in the numbered sequence shown.
22. Install the bolt (B) securing the A/C line.
23. Install the crankshaft pulley. Service and Repair
M/T model
A/T model
24. Connect the positive crankcase ventilation (PCV) hose.
25. Install the cylinder head cover. Cylinder Head Cover Installation
26. Install the drive belt auto-tensioner. Removal and Replacement
27. Install the splash shield. Engine Installation
28. Install the front wheels.
