Draining and Filling

WARNING: Never remove pressure relief cap under any conditions
while engine is operating. Failure to follow these instructions could result in personal injury and/or damage to cooling system or engine. To avoid burns from scalding coolant or steam, use extreme care when removing pressure relief cap.

DRAIN
1. Bring engine to normal operating temperature, then turn engine OFF.
2. Drain cooling system as follows:
a. If cooling system is still hot, carefully wrap thick cloth around pressure relief cap and rotate slowly until pressure begins to release. Step back until pressure is released.
b. Rotate pressure relief cap until free, then remove cap.
c. Raise and support vehicle, then remove splash shield from front of front subframe.
d. Open radiator draincock and drain coolant system, then remove inlet and outlet heater water hoses from heater core.
e. Carefully use compressed air, blow regulated 10 psi of air pressure into heater core to ensure coolant is drained from core.

FILL

NOTE: This engine has an aluminum cylinder head and requires a special corrosion inhibiting coolant to avoid cooling system damage. Use only specified coolant in this engine.

1. Fill cooling system as follows:
2. Install all cooling system hoses previously removed, then check all hose clamps for proper tightness.
3. Ensure radiator draincock is closed, then install splash shield onto front of front subframe and body.
4. Lower vehicle, then add 50/50 mixture of specified coolant and water into radiator coolant recovery reservoir fill neck until coolant mixture reaches MAX mark on radiator coolant recovery reservoir. Some coolant/water will be retained in cylinder block if cylinder block drain plugs are not removed. When refilling cooling system after flushing, adjust coolant mix ratio to obtain 50/50 mixture. Be certain to account for approximately one quart of water left in cylinder block when drain plugs are not removed.
5. Install pressure relief cap to radiator coolant recovery reservoir.
6. Bleed cooling system as follows:
7. Select maximum heater temperature and blower motor speed settings, then position control to discharge air at A/C vents in instrument panel.
8. Start engine and allow to idle. While engine is idling, feel for hot air at A/C vents. Allow to idle until normal operating temperature is reached. Hot air should discharge from A/C vents. Engine coolant temperature gauge should maintain a stabilized reading in middle of NORMAL range and upper radiator hose should feel hot to touch.

NOTE: If air discharge remains cool and engine coolant temperature gauge does not move, engine coolant level is low in engine and must be filled. Stop engine, allow to cool and fill cooling system as outlined.

9. Check engine coolant level in radiator coolant recovery reservoir and fill as necessary. When engine coolant level indicator flashes, approximately 1-1.5 quarts of coolant mixture can be added to radiator coolant recovery reservoir after proper engine coolant system refill.