not sure but here's the procedure From the service manual
( I have a weird problem where the system will not pull from the reservoir, keeps on pushing coolant to reservoir when it gets hot, then overflowing and dumping coolant)
Cooling System Draining, Filling and Bleeding Draining
WARNING: To avoid personal injury, do not unscrew the coolant pressure relief cap while the engine is operating or hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly.
CAUTION: The coolant must be recovered in a suitable, clean container for reuse. If the coolant is contaminated it must be recycled or disposed of correctly.
NOTE: About 80% of the coolant capacity can be recovered with the engine in the vehicle. Dirty, rusty or contaminated coolant requires replacement.
Remove the radiator cap.
Place a suitable container below the radiator draincock. Drain the coolant.
Tighten the radiator draincock when finished.
Filling-Bleeding
CAUTION: Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the proper concentration and fluid level. When adding engine coolant, use a 60/40 mixture of clean drinkable water and engine coolant.
To maintain the integrity of the coolant and the cooling system:
Add Premium Engine Coolant E2FZ-19549-AA (CXC-8-B in Canada) or an equivalent meeting specification ESE-M97B44-A.
Do not add orange-colored EXTENDED LIFE COOLANT such as F6AZ-19544-A, meeting WSS-M97B44-D. Mixing coolants may degrade the coolant's corrosion protection.
Do not add alcohol or methanol or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
Do not mix recycled coolant unless it meets the requirements of specification ESE-M97B44-A. Not all coolant recycling processes meet this specification; use of such a coolant may harm the engine and cooling system components.
1. Fill the radiator through the radiator cap opening. Close the cap when full.
2. Fill the radiator coolant recovery reservoir to the cold fill line.
3. Select the maximum heater temperature and blower motor speed settings. Position the control to discharge air from the A/C vents to the instrument panel.
4. CAUTION: If the air discharge remains cool and the engine coolant temperature gauge does not move, the engine coolant level is low in the engine and must be filled. Stop the engine, allow it to cool and fill the cooling system.
Run the engine until it reaches operating temperature.
5. WARNING: To avoid personal injury, do not unscrew the coolant pressure relief cap while the engine is operating or hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly.
Turn off the engine and allow the cooling system to cool. When the pressure has been released, remove the radiator cap. Add more coolant mixture to the radiator until full.
6. Add more coolant mixture to the radiator coolant recovery reservoir until the level reaches the cold fill line.
7. Start the engine and allow it to idle. While the engine is idling, feel for hot air from the A/C vents.
Hot air should discharge from the A/C vents. The engine coolant temperature gauge should maintain a stabilized reading in the middle of the NORMAL range and the upper radiator hose should feel hot to the touch
8. Check the engine coolant level in the radiator coolant recovery reservoir and fill it as necessary.
Repeat Steps 5 through 8 as necessary.
