Six-cylinder engines:
- In engines with a carburetor, remove the fuel pump.
- Drain the engine oil.
- Remove the lower half of the oil pan.
- Loosen the mounting bolts in the cylinder block and the crankshaft main bearing mounting cover. Fig. 104 shows the location of the oil pump on the engine.
Fig. 104. Installing the oil pump in a six-cylinder engine.
Remove the oil pump.
Remove the oil receiver, remove the mounting ring and take out the mesh.
Unscrew the lower housing of the oil pump.
Remove the driven gear with the axle and the drive gear with the drive shaft from the housing.
Clean all parts and check for wear. If the pump housing or gears are damaged, it is advisable to replace the pump assembly. Check the ease of rotation of the pump gears. Install the oil receiver with a new gasket. Install the oil pump. To connect the pump drive parts, turn the crankshaft in both directions. Tighten the mounting bolts. Install the lower half of the oil pan and fill the engine with oil.
Eight-cylinder engines:
- Drain the engine oil.
- Remove the lower half of the oil pan.
- Turn the crankshaft until the counterweight of the first main bearing journal is in a horizontal position.
Fig. 102. Schematic diagram of the lubrication system of a six-cylinder engine with an oil cooler.
1 - oil pump,
2 - pressure reducing valve,
3 - oil filter,
4 - filter valve,
5 - thermostat with valve,
6 - oil radiator,
7 - oil pump drive,
8 - intermediate shaft,
9 - ignition distributor drive,
10 - intermediate shaft with gear,
11 - guide sprocket,
12 - camshaft,
13 - camshaft,
14 - chain tensioner,
15 - rocker arm,
16 - camshaft support bearing cover.
Fig. 103. Lubrication system diagram of an eight-cylinder engine.
Loosen the three oil pump mounting bolts and the pump drive sprocket mounting bolt. Tilt the pump down and remove the sprocket mounting bolt. Use a screwdriver to remove the drive sprocket from the pump and remove the pump. Remove the sprocket from the drive chain.
When installing on the sprocket, put the drive chain on and place the sprocket on the oil pump shaft. The sprocket mounting sleeve should fit into the groove on the pump shaft. Tilt the pump down, screw in and tighten the sprocket mounting bolt to 28 Nm. Tighten the three pump mounting bolts to 25 Nm. When tightening the bolt to the right of the sprocket, hold the tension spring with a screwdriver to prevent it from turning.
Install the lower half of the oil carriage with a new gasket, and evenly tighten the M6 mounting bolts to 10 Nm or M8 to 25 Nm. Screw in the drain plugs and fill the engine with oil.