Inspection

Wash the disassembled parts, check them for the following items and repair or replace if defective.

INNER ROTOR
Check the outside diameter of the inner rotor shaft portion and replace it if worn or damaged.

SPECIFICATION:
Outside diameter of inner rotor shaft portion 1.4035 - 1.4055 in. (35.65 - 35.70 mm).

OUTER ROTOR
Check the outer rotor and replace if worn or damaged.

SPECIFICATION:
Outside diameter of outer rotor 1.9665 - 1.9685 in. (49.95 - 50.00 mm).

OIL PUMP CASE CLEARANCE
Measure the clearance between the outer rotor and the cylinder block rotor housing. If the clearance exceeds the limit, replace the rotor.

SPECIFICATION:
Case clearance:
Standard 0.0039 - 0.0071 in. (0.10 - 0.18 mm)
Limit 0.0087 in. (0.22 mm)






OIL PUMP SIDE CLEARANCE
1. Measure total height of case projection (H1) plus oil pump inner and outer rotors (H2).











2. Measure depth (L) of rotor housing bore in cylinder block.
3. Calculate side clearance (C) using the following equation: C = L - (H1 + H2)
4. If side clearance value (C) is larger than "Limit" shown below, replace pump inner and outer rotors with the suitable ones selected from the following specifications.

SPECIFICATIONS:
Side Clearance: C
Standard 0.0020 - 0.0063 in. (0.05 - 0.16 mm)
Limit 0.0071 in. (0.18 mm)
Height of case projection: H1 0.3138 - 0.3150 in. (7.97 - 8.00 mm)
Depth of rotor housing: L 0.8646 - 0.8677 in. (21.96 - 22.04 mm)






INNER AND OUTER ROTOR
Marking Height (H2)
A 0.5468 - 0.5476 in. (13.89 - 13.91 mm)
B 0.5472 - 0.5480 in. (13.90 - 13.92 mm)
C 0.5476 - 0.5484 in. (13.91 - 13.93 mm)

OIL RELIEF VALVE
Check the valve for fitting condition and damage. Check the relief valve spring for damage and deterioration. Replace the parts if defective.

SPECIFICATION:
Relief Valve Spring:
Free length 1.854 in. (47.1 mm)
Installed length 1.319 in. (33.5 mm)
Load when installed 8.555 - 9.437 lb. (3.88 - 4.28 kg)

OIL PUMP CASE
Check the oil pump case for worn shaft hole, clogged oil passage, worn rotor chamber, cracks and other faults.

OIL SEAL
Check the oil seal lips for deformation, hardening, wear, etc. and replace if defective.