Lubrication System: Inspection

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 for distorted or broken relief valve spring.

Standard value 

Free height: 43.8mm (1.724 in.)

Load : 3.7kg/40.1mm (8.14 lb/1.579 in.)

Using a feeler gauge and precision straight edge, measure the clearance between the rotors and precision straight edge.

Fig 1: Measuring Clearance Between Rotors And Precision Straight Edge

Courtesy of HYUNDAI MOTOR CO.

If the side clearance is greater than maximum, replace the rotors as a set. If necessary, replace the front case.

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.)

Fig 2: Measuring Tip Clearance Between Inner And Outer Rotor Tips

Courtesy of HYUNDAI MOTOR CO.

If the tip clearance is greater than maximum, replace the rotor as a set.

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.)

Fig 3: Measuring Clearance Between Outer Rotor And Body

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.