Removal
- Disconnect the cable from the negative battery terminal.
- Raise the front of the vehicle.
- Place a pan under the engine to collect engine oil.
- Drain the engine oil.
- Using a lifting mechanism, lift the engine so that its weight is supported by the lifting mechanism.
- Remove the plate located between the engine and the gearbox.
- On a vehicle with an F3R 768 engine, lower the engine subframe by 50 mm.
- Remove the oil pan mounting bolts and separate it from the cylinder block.
- Remove the oil pan and gasket.
- Remove the oil pump mounting bolts and remove it.
Disassembly and inspection
- Unscrew the mesh filter mounting bolts and remove it.
- Remove the gears from the oil pump housing
- Check the gears, gear seats in the pump housing and the mating surface for installing the mesh filter for scratches, nicks and wear.
- Install the gears into the oil pump housing.
- Using a metal ruler and feeler gauge, check the clearances between the gears and the oil pump housing (see values in "Technical Specifications").
- Using a metal ruler and feeler gauge, check the end clearance of the oil pump gears.
Caution: If the clearances exceed the permissible values or there are scratches or marks on the pump elements, replace the oil pump assembly.
Fig. 1.80. Checking the clearance between the gear and the oil pump housing
Fig. 1.81. Checking the end clearance of the oil pump gears
- Lubricate the gears and the mating surface of the pump body with engine oil to install the mesh filter.
- Install the gears into the oil pump housing and mesh filter and secure it with bolts, tightening them to the required torque.
- Remove the pressure reducing valve plug mounting pin (Fig. 1 82).
Fig. 1.82. Oil pump pressure reducing valve: 1 - piston; 2 - spring; 3 - cork; 4 - pin
- Remove the plug, spring and piston from the oil pump housing.
- Check the piston and its seat for scratches, nicks and wear.
- Lubricate the piston and spring and install them into the oil pump housing.
- Install the plug and secure it with the pin.
Installation
- Clean the seating surfaces of the oil pan and cylinder block.
- On the F3R 728 engine, make sure there is a centering socket on the pump shaft (Fig. 1.83).
Fig. 1.83. Location of the centering socket (1) on the oil pump shaft of the F3R 728 engine
- Install the oil pump and secure with bolts, tightening them to the required torque (fig. 1.84, 1.85).
Fig. 1.84. Fastening the oil pump on the F3R 728 engine: 1 - bolts for fastening the oil pump to the cylinder block; 2 - bolts for fastening the mesh filter to the oil pump
Fig. 1.85. Location of oil pump mounting bolts on F3R 768 engine
- Install the oil pan with a new gasket and secure with bolts, tightening them to the specified torque.
- Further installation is carried out in the reverse order of removal.
- Fill the engine with oil.
Caution: To fill the lubrication system with engine oil before starting the engine, disconnect the connector from the inertial shock sensor and turn the engine crankshaft with the starter for 30 seconds.