Engine Cooling System: Maintenance Nissan Quest III

FLUSHING COOLING SYSTEM

1. Fill the radiator from the filler neck above the radiator upper hose and reservoir tank with clean water and reinstall radiator filler cap.
2. Run the engine and warm it up to normal operating temperature.
3. Rev the engine two or three times under no-load.
4. Stop the engine and wait until it cools down.
5. Drain the water from the system. Refer to , " «DRAINING ENGINE COOLANT»(ref-239944-S37417993932006080300000) ".
6. Repeat steps 1 through 5 until clear water begins to drain from the radiator.

Scheme 24

Scheme 25

1. Drain the coolant from the radiator. Refer to , " «CHANGING ENGINE COOLANT»(ref-239944-S24399931942006080400000) ". CAUTION: Perform when engine is cold.
2. Partially drain the A/T fluid. Refer to , " «CHANGING A/T FLUID»(ref-239943-S20459687922006080300000) ".
3. Remove fresh air duct. Refer to , " «REMOVAL AND INSTALLATION»(ref-239942-S12459786952006080400000) ".
4. Disconnect radiator upper and lower hoses.
5. Disconnect the A/T fluid cooler hoses. NOTE: Plug hoses to avoid leakage of A/T fluid.
6. Disconnect the engine coolant reservoir tank hose.
7. Remove the radiator upper clips by pulling the tabs outside to release the lock, as shown. CAUTION: To prevent damage, do not pull lock tabs excessively.
8. Disconnect fan electrical connectors.
9. Remove the radiator fan assembly. CAUTION: Do not damage or scratch A/C condenser and radiator core when removing.
10. If necessary, remove the radiator fan assembly from the radiator. Refer to , " «DISASSEMBLY AND ASSEMBLY OF RADIATOR FAN»(ref-239944-S00520464642006080400000) ".
11. If necessary, remove the mounting rubber from the radiator.

Scheme 26

Scheme 27

1. Apply pressure using Tool. Tool number : EG17650301 (J-33984-A) WARNING: To prevent the risk of the hose coming undone while under pressure, securely fasten it down with a hose clamp. CAUTION: Attach a hose to the A/T fluid cooler as well.
2. Place radiator in water filled tank and check for leakage.