Draining

NOTE: This procedure significantly increases the amount of used coolant and diluted hazardous waste.

1. Park the vehicle on a level surface.
2. Remove and clean coolant recovery reservoir.
3. Remove the radiator cap when the engine is cool by:
A. Slowly rotating the cap counterclockwise to detent. Do not press down while rotating pressure cap.
B. Wait until any residual pressure (indicated by a hissing sound) is relieved.
C. After all hissing stops, continue to rotate counterclockwise until the cap is removed.

NOTE: Recover coolant and store in a used coolant holding tank and submit the used coolant for recycling on a regular basis. This procedure significantly increases the amount of used coolant and diluted hazardous waste.

4. Place drain pan under vehicle to collect all drained coolant.
5. Open the radiator drain valve located at the bottom of the radiator tank.
^ For procedures requiring the cooling system to be partially drained, opening the radiator drain valve should provide sufficient draining and no further actions should be necessary.





6. Open the air bleed vent(s):
^ Open the air bleed vents on the thermostat housing and above coolant pump on the thermostat bypass pipe. The air bleed vents should be opened two to three turns.
7. Coolant temperature switch.





8. Remove the engine block drains:
^ Remove both engine block drains. The front engine block drain is located between the starter and the engine oil filter. The rear engine block drain is located in the same area in the center of the block.
9. Disconnect inlet hose to engine oil cooler, if equipped.
10. Allow the coolant to drain completely.

NOTE: Dispose of used coolant in a proper fashion, i.e., in a used coolant holding tank. NEVER POUR USED COOLANT DOWN THE DRAIN! Ethylene glycol antifreeze is a very toxic chemical. Disposing of it into the sewer system or ground water is both illegal and ecologically unsound!