Engine Oil Pump: Inspection: Notes
- Inspect relief plunger.
Coat the valve with engine oil and check that it falls smoothly into the plunger hole by its own weight.
If it does not, replace the relief plunger. If necessary, replace the front case.
- Inspect relief valve spring.
Inspect for distorted or broken relief valve spring.
Standard value
Free height : 43.8 mm (1.724 in.)
Load : 3.7kg/40.1 mm (8.14 lb/1.579 in.)
- Inspect rotor side clearance.
Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.
ROTOR SIDE CLEARANCE REFERENCESide clearance Outer gear 0.04 ~ 0.09 mm (0.0016 ~ 0.0035 in.) Inner gear 0.04 ~ 0.085 mm (0.0016 ~ 0.0033 in.) If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the front case.
- Inspect rotor tip clearance.
Using a feeler gauge, measure the tip clearance between the inner and outer rotor tips.
Tip clearance
0.025 ~ 0.069 mm (0.0010 ~ 0.0027 in.)
Courtesy of HYUNDAI MOTOR CO.
If the tip clearance is greater than maximum, replace the rotor as a set.
- Inspect rotor body clearance.
Using a feeler gauge, measure the clearance between the outer rotor and body.
Body clearance
0.12 ~ 0.185 mm (0.0047 ~ 0.0073 in.)
Courtesy of HYUNDAI MOTOR CO.
If the body clearance is greater than maximum, replace the rotors as a set. If necessary, replace the front case.