Attention! The oil must be changed when the engine has warmed up to operating temperature.
1. Replace filter element 4 (figure 1.9).
2. Pump out the oil through the guide tube of the oil level indicator 1.
3. Drain the oil through drain plug 3 in the engine sump.
4. Replace the gasket on the drain plug and tighten it to a torque of 25 Nm.
5. Fill the oil through the filler neck (the volumes of engine oil are given in table 1.2).
6. Start the engine. Let the engine idle and check for leaks near the filter and drain plug.
7. Turn off the engine. Check the oil level after 2 minutes. Never fill the oil level above the "Max" mark
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Figure 1.9. Changing engine oil:
A. Engine 602; B. Engine 904
1 - Oil level indicator; 2 - Filler plug; 3 - Drain plug; 4 - Filter element; 5 - Sealing ring.
Table 1.2. Engine oil volumes
| Engine code | Engine 602.984/985 | Engine 904.908/923 |
| Volume of lubrication system with filter, l | 9.5 | 15.8 |