Six-cylinder engines:
- On engines with a carburetor, remove the fuel pump.
- Drain engine oil.
- Remove the bottom half of the oil pan.
- Loosen the bolts in the cylinder block and the crankshaft main bearing caps. On fig. 104 shows the location of the oil pump on the engine.
Pic. 104. Installing an oil pump in a six-cylinder engine.
Remove oil pump.
Remove the oil receiver, remove the adjusting ring and remove the grid.
Unbolt the lower oil pump housing.
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 for 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 two directions. Screw in the mounting bolts and tighten. Install the lower half of the oil sump and fill the engine with oil.
Eight-cylinder engines:
- Drain engine oil.
- Remove the bottom half of the oil pan.
- Rotate the crankshaft until the counterweight of the first main bearing journal is horizontal.
Pic. 102. Scheme 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 cooler,
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,
16 - a cover of basic bearings of camshafts.
Pic. 103. Scheme of the lubrication system of an eight-cylinder engine.
Remove the three oil pump mounting bolts and the pump drive sprocket mounting bolt. Tilt the pump down and remove the sprocket mounting bolt. Remove the drive sprocket from the pump with a screwdriver and remove the pump. Remove the sprocket from the drive chain.
When installing on the sprocket, put on the drive chain and place the sprocket on the oil pump shaft. The sprocket mounting sleeve must fit into the groove on the pump shaft. Tilt the pump down, screw in and tighten the sprocket bolt to 28 Nm. Tighten the three pump mounting bolts to 25 Nm. When tightening the bolt right from the sprocket, hold the tension spring with a screwdriver from turning.
Install the lower half of the oil carriage with a new gasket, and evenly tighten the mounting bolts M6 to 10 Nm or M8 to 25 Nm. Close the drain plugs and fill the engine with oil.