2004 Nissan Sentra Owner's Manual - Page 172

8. Start the engine, and warm it up until it reaches normal operating temperature. Then race the engine two or three times under no load. Watch the engine coolant temperature gauge for signs of overheating. 9. Stop the engine. After it completely cools down, refill the radiator up to the filler opening. Fill the engine coolant reservoir tank up to the MAX level. 10. For QG18DE engine only, open and close the air release plug(s) to release air. Then fill the radiator again and install the radiator cap. WDI0171 WDI0172 QG18DE engine 2. Open the drain plug on the engine block. 3. Open the radiator cap to drain the coolant. ● Waste coolant must be disposed of properly. ● Check your local regulations. 4. Flush the cooling system by running fresh water through the radiator. 5. Close the drain plugs on the radiator and the engine block securely. QG18DE engine 6. See the "Technical and consumer information" section for cooling system capacity. Fill the radiator slowly with the proper mixture of coolant and water. Fill the reservoir tank up to the MAX level. 7. For QG18DE engine only, open and close the air release plug(s) to release air. Then fill the radiator again and install the radiator cap. 11. Check the drain plugs on the radiator and the engine block for any sign of leakage. For QG18DE only, also check the air release plug for any sign of leakage. 8-10 Maintenance and do-it-yourself