Withdrawal
Remove the inner and outer gears of the oil pump from the front cover, after noting their relative position.
Examination
1. Check for wear or damage to the oil pump gear teeth.
2. Check the axial clearance of the oil pump rotors. Axial clearance: 0.02–0.07 mm.
3. Measure the gap between the teeth of the oil pump rotors with a feeler gauge. The gap between the teeth of the oil pump rotors: 0.1–0.2 mm.
4. Check the radial clearance of the oil pump rotors.
Plunger and spring
1. Check for smooth plunger movement.
2. Check the spring for deformation or damage.
Checking the oil pressure sensor
1. Using an ohmmeter, check the continuity of the connection between the sensor terminal and the cylinder block. If there is no continuity, replace the sensor.
2. Using an ohmmeter, check the continuity of the connection between the sensor terminal and the cylinder block with the sensor rod extended. If there is continuity even with the stem extended, replace the sensor.
3. However, if there is no conductivity even when a 50 kPa vacuum is applied to the sensor opening, the sensor is working properly.
Checking the oil sprayer
1. Check the oil spray and control valve for blockages.
2. Check the oil sprayer for damage and deformation.
Installation
1. Install the oil pump outer rotor in the front cover, after aligning the previously applied marks.
Attention! Before installing the rotor, lubricate it with engine oil.
2. Using a special tool, screw in the oil pressure sensor, having previously lubricated the threads of the sensor with a layer of sealant.
Attention! Do not overtighten the pressure sensor with high torque.