Removing
1. Remove the toothed belt.
2. Remove the oil pump pulleys and crankshaft.
3. Remove the main oil pan block.
4. Unscrew the bolts and remove the oil pump cover from the end of the crankshaft.
5. Using a marker, mark the relative position of the inner and outer rotor of the oil pump.
6. Remove the inner oil pump rotor.
7. Remove the outer oil pump rotor.
8. If necessary, unscrew the bolt of the pressure relief valve, remove the O-ring.
Examination
1. Clean the oil pump parts and check them for wear.
2. Using a feeler blade, check the gap between the teeth of the pump rotor.
3. Using a feeler blade, check the clearance between the outer rotor and the oil pump housing.
4. Check that the piston of the safety valve moves easily and freely under the action of the spring.
Installation
1. Install a new O-ring on the pressure relief valve and screw the valve into the cylinder block, tightening it to the specified torque.
2. Lubricate the pump rotor with clean engine oil and install in the pump housing in accordance with the previously made mark.
3. Replace oil pump and crankshaft O-rings.
4. Check that the mating surfaces of the oil pump housing and pump cover are clean and dry.
5. Apply a light coat of sealant to the mating surface of the oil pump cover and, being careful, install the oil pump cover (A and B - places for applying sealant).
6. Apply sealant to the threads of the pump cover mounting bolts and screw in the screws, tightening them to the required torque.
7. Install the oil pump and crankshaft pulleys. Install the oil pan.
8. Fill the engine with clean engine oil.
Replacing the O-ring of the oil pump
1. Remove the oil pump pulley.
2. Drill two small holes in the o-ring at diametrically opposite ends of the o-ring. Insert two self-tapping screws into the drilled holes in the O-ring and use pliers to pull the O-ring out past the screw heads.
3. Clean the sealing ring seat.
4. Lubricate the sealing lips of the new sealing ring with clean engine oil and, using a tubular drift, install the sealing ring in place.
5. Install the oil pump pulley.
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