Oil Pump Inspection
Precautions: General safety (00)
Oil Seal
Check oil seal lip for defects and damage. Replace it if necessary.
Oil Pump
•Check outer rotor (1), inner rotor (2), rotor plate and timing chain cover for excessive wear or damage.
•Check that relief valve (1) is not excessively worn or damaged and operates smoothly.
| 3. | Front mark |
Radial clearance
Check radial clearance between outer rotor (1) and timing chain cover (2) using feeler gauge (3).
If clearance is out of specification, replace oil pump assembly.
Radial clearance between outer rotor and timing chain cover
Standard: 0.265 – 0.335 mm (0.0104 – 0.0131 in.)
Limit: 0.355 mm (0.0139 in.)
Side clearance
Using straightedge (1) and feeler gauge (2), measure side clearance.
If side clearance is out of specification, replace oil pump assembly.
Side clearance of oil pump inner rotor
Standard: 0.03 – 0.08 mm (0.0011 – 0.0031 in.)
Limit: 0.10 mm (0.0039 in.)
Relief valve spring free length and load
Check free length and load of relief valve spring as shown in figure. If any of measurement is smaller than specification, replace relief valve spring.
Relief valve spring free length and load
| Standard | Limit | |
|---|---|---|
| Free length | 59.7 mm (2.35 in.) |
— |
| Load at spring length 52.0 mm (2.04 in.) |
23.1 N (2.36 kgf, 5.19 lbf) |
20 N (2.04 kgf, 4.50 lbf) |
