Removal
1. Remove the oil pan (see section Removal and installation the engine oil pan).
2. Apply timing marks to the injection pump and oil pump (refer to the accompanying illustration).
3. Remove the cooling system outlet pipe.
4. Loosen the fasteners and remove the oil pump housing (refer to the accompanying illustration).
5. To disassemble the pump, remove its driven gear (refer to the accompanying illustration), unscrew the plug of the pressure reducing valve and remove the valve, gasket and spring.
6. Scrape off all traces of sealant and old gasket material from the mating surfaces of the pump and engine block, then wipe the surfaces with a rag soaked in acetone.
Examination
1. Wash all components in solvent, then inspect them for signs of excessive wear and mechanical damage.
2. Inspect the rubbing surfaces of the pressure reducing valve components, assess the condition of the valve spring. If necessary, replace the valve assembly.
Installation
1. Place the drive and driven gears into the pump body with the markings facing the cover.
2. Lubricate the components of the pressure reducing valve with clean engine oil and install them in their original place. Tighten the plug with a new sealing gasket.
3. Apply a bead of RTV sealant to the mating surface of the pump (refer to the accompanying illustration).
3. Apply a new rubber seal (refer to the accompanying illustration).
Note: Pump installation must be completed within five minutes of applying the sealant.
4. Tighten the oil pump housing mounting bolts to 20 Nm.
5. Install the fuel injection pump, following the marks applied earlier.
6. Unscrew the oil pump plug with a 5 mm Allen key (refer to the accompanying illustration) and pour about 10 cm³ of engine oil into the pump.
7. Lubricate the plug threads with hardening sealant and screw the plug into place.
8. Install the oil receiver with a new gasket.
9. Install the oil pan.
10. Add the required amount of engine oil, start the engine and check it for signs of developing leaks.
11. Check the engine oil level again.