1998 Nissan Frontier Owner's Manual - Page 153

ENGINE OIL ADI1028 ADI1029 ADI1030 7. Open and close the air release plug to release air. Then fill the radiator again and install the radiator cap. 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 reservoir tank up the MAX level. 10. Open and close the air release plug to release air. Then fill the radiator again and install the radiator cap. 11. Check the drain valve on the radiator and drain plug on the engine block for any sign of leakage. CHECKING ENGINE OIL LEVEL 1. Park the vehicle on a level surface and apply the parking brake. 2. Start the engine and let it idle until it reaches operating temperature. 3. Turn off the engine. Wait a few minutes for the oil to drain back into the oil pan. 4. Remove the dipstick and wipe it clean. Reinsert it all the way. 5. Remove the dipstick again and check the oil level. It should be between the H 8-6 Do-it-yourself