### Cooling System Bleeding

#### PROCEDURE

##### 1.6L (GA16DE) And 2.0L (SR20DE) Engines

1. Turn the heater temperature control to the HOT position and make sure the A/C is OFF.
2. Remove the air relief plug and air bleeder cap.
3. Fill the radiator with the proper mix of coolant and water until the coolant starts to spill out of the relief plug.
4. Install the air relief plug and air bleeder cap.
5. Fill the coolant reservoir up to the H or MAX line.
6. Install a steel wire between the negative pressure valve and its seat on the radiator cap. This allows the air and coolant to be directed into the coolant reservoir regardless of system pressure.
7. Install the radiator cap.
8. Run the engine until it reaches normal operating temperature.
9. Raise the engine speed to 2500 RPM for ten seconds, then let the engine return to idle speed.
10. Repeat step 9 two or three times.

    NOTE: Watch the coolant temperature gauge to avoid overheating the engine.

11. Stop engine and allow it to cool.

    NOTE: A fan can be used to expedite cool down time.

12. Remove the radiator cap and check coolant level.
13. Top off the coolant level in the radiator and in the coolant reservoir.
14. Reinstall the radiator cap and repeat steps 9 through 13 two more times.
15. Stop engine and allow it to cool.
16. Remove the radiator cap and remove the steel wire from negative pressure valve.
17. Reinstall the cap and warm engine to normal operating temperature.
18. Raise the engine speed to 4000 RPM and listen for coolant flow. Move the temperature control lever to several positions between cool and hot while running engine at 4000 RPM. The sound may be most noticeable at the heater water cock.
19. If water sounds are heard, use the following procedures:
    1. On 1.6L (GA16DE) engines, bleed the air from the cooling system by repeating steps 6 through 10
    2. On 2.0L (SR20DE) engines, follow steps C through M
    3. Allow the engine to cool down and remove the air bleeder cap from the heater inlet hose.
    4. Attach a suitable clear hose at the bleeder pipe and put the opposite end in the coolant overflow reservoir.
    5. Install a steel wire between the negative pressure valve and its seat on the radiator cap.
    6. Install the radiator cap and start the engine.
    7. Look for bubbles in the coolant reservoir tank.
    8. Set the heater temperature control lever to its MAX. cool position in order to bypass coolant through the clear hose.
    9. Run engine at 2300 RPM until all bubbles disappear from the clear hose.

       NOTE: DO NOT run engine at higher than 2300 RPM, because engine damage may result from the reduced coolant flow.

    10. When the bubbles are gone, move heater control lever to the HOT position and check for the sound of coolant flow. If sound is heard, repeat steps H through J.
    11. Stop the engine and allow it to cool.
    12. Remove the cap and remove the steel wire. If necessary, top off the coolant and reinstall the radiator cap.
    13. Remove the clear hose and reinstall the air bleeder cap.
20. Check for leaks.

##### 2.4L (KA24DE) and 3.0L (VE30DE and VG30E) Engines

1. Move the heater temperature control lever to the hot position.
2. Open the air relief plug.
3. Fill the radiator with coolant until coolant starts to spill from the air relief plug.
4. Close the relief plug and start the engine.
5. Run the engine until warm.
6. Race the engine 2 or 3 times under no load.
7. Stop the engine and allow it to cool.
8. Check the coolant level in the radiator and add if necessary.
9. Fill the reservoir to the MAX line.
10. Reinstall the radiator cap, start the engine, and check for leaks.

##### 3.0L (VQ30DE, VG30DE and VG30DETT) Engines

1. Disconnect the negative battery cable.
2. With the coolant drained, close the radiator drain plug and install the engine drain plugs.
3. Slowly fill the radiator with the proper mixture of coolant and water. Fill the reservoir and install the radiator cap.
4. Connect the negative battery cable.
5. Start the engine and allow it to reach normal operating temperature, watch the coolant temperature gauge for signs of overheating. Race the engine two or three times with no-load.
6. Shut the engine OFF and let it cool down completely.
7. After the engine has cooled down remove the radiator cap and fill the radiator to the filler opening. Fill the reservoir to the H level.
8. Check the radiator drain plug and the engine drain plugs for leakage.
9. Install the radiator cap.