Oil Pump: Service and Repair

Overhaul

Special Tools Required
Oil seal driver 07LAD-PT3010A

Removal
1. Drain the engine oil.
2. Turn the crankshaft so that the No. 1 piston is at top dead center.
3. Remove the timing belt.
4. Remove the idler pulley.
5. Remove the crankshaft position (CKP) sensor, then remove the timing belt drive pulley.
6. Remove the VTEC solenoid valve and oil filter assembly.
7. Remove the oil pan.





8. Remove the oil screen (A).
9. Remove the mounting bolts and the oil pump assembly (B).

Inspection
1. Remove the screws from the pump housing, then separate the housing and cover.





2. 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 oil pump assembly.
Inner Rotor-to-Outer Rotor Radial Clearance
Standard (New): 0.04 - 0.16 mm (0.002 - 0.006 inch)
Service Limit: 0.20 mm (0.003 inch)





3. Check the housing-to-rotor axial clearance between the rotors (A) and pump housing (B). If the housing-to-rotor axial clearance exceeds the service limit, replace the oil pump assembly.
Housing-to-Rotor Axial Clearance
Standard (New): 0.02 - 0.07 mm (0.001 - 0.003 inch)
Service Limit: 0.12 mm (0.005 inch)





4. 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 oil pump assembly.
Housing-to-Outer Rotor Radial Clearance
Standard (New): 0.14 - 0.19 mm (0.006 - 0.007 inch)
Service Limit: 0.20 mm (0.008 inch)
5. Inspect both rotors and pump housing for scoring or other damage. Replace 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. Remove the old oil seal From the oil pump.





2. Gently tap in the new oil seal until the special tool bottoms on the pump.
3. Remove old liquid gashes from the oil pump mating surfaces, bolts and bolt holes.
4. Clean and dry the oil pump mating surfaces.





5. Install the oil pump (A).
-1 Apply liquid gasket, P/N 08718-0001 or 08718-0003, evenly to the block mating surface of the oil pump and to the inner threads of the bolt holes.

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

-2 Grease the lip of the oil seal, and apply oil to the new O-rings (B).
-3 Install the 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 check the seal for distortion.
6. Install the oil screen (D).
7. Install the oil pan.
8. Install the VTEC solenoid valve and oil filter assembly.
9. Install the timing belt drive pulley, then install the CKP sensor.
10. Install the idler pulley.
11. Install the timing belt.
12. After assembly, wait at least 30 minutes before filling the engine with oil.