Oil pump parts
1. Pump (front cover); 2. Spring; 3. Plug; 4. Gasket; 5. Pressure reducing valve; 6. Gasket; 7. Slave rotor; 8. Leading rotor; 9. Pump cover; 10. Crankshaft oil seal
Removal
1. Remove the belts and tensioner roller.
2. Remove the tray.
3. Remove the crankshaft pulley and front cover.
4. Remove 7 screws (indicated by arrows) and remove the oil pump housing.
5. Remove any remaining seal from the split surfaces of the pump and cylinder block and wash the surfaces with solvent.
6. Remove the leading and trailing rotors.
7. Disassemble the pressure reducing valve. Unscrew the plug carefully, holding it with force, as the valve spring is very rigid.
Examination
1. Wash all parts in solvent, check for wear and damage.
2. Check the condition of the sliding surface of the pressure reducing valve piston and spring. If damage is detected, replace the piston and spring together.
3. Check the gap between the driven rotor and the housing with a feeler gauge.
View the full text on the portal [toyotaman.ru]
4. Check the end clearance between the rotor and the cover.
5. Check the clearance in the rotor engagement.
6. If the gaps exceed the norm, replace the rotors as a set. If necessary, replace the pump body (front cover).
Installation
1. Lubricate the rotors with engine oil and install them into the housing.
2. Place technical petroleum jelly in the pump cavities, place the gasket, install the cover and tighten the screws.
3. Lubricate the relief valve piston with fresh engine oil and install the valve parts.
4. Install the new chain cover gasket onto the guide pins.
5. Replace the oil channel cover gasket.
6. Install the chain cover by engaging the oil pump drive rotor with the crankshaft drive gear.
7. Install the remaining parts in reverse order.
8. Fill with oil, start the engine, check for leaks.