Coolant Reservoir: Service and Repair

Degas Bottle



Degas Bottle - 3.7L and 5.0L Engines











Degas Bottle - 5.4L Engine









Removal and Installation

All engines

1. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

Release the pressure in the cooling system by slowly turning the pressure relief cap one half turn counterclockwise. When the pressure is released, remove the pressure relief cap.

2. Using hose clamp pliers, clamp the degas bottle-to-engine hose.

3. Using a suitable suction device, siphon the coolant from the degas bottle.

4. Disconnect the radiator-to-degas bottle hose from the degas bottle.

3.7L engine

5. Release the clamp and disconnect the thermostat housing-to-degas bottle hose from the degas bottle.

5.0L engine

6. Release the clamp and disconnect the coolant outlet connection-to-degas bottle hose from the degas bottle.

All engines

7. Remove the 2 degas bottle bolts.
- To install, tighten to 8 Nm (71 lb-in).

8. Release the clamp and disconnect the degas bottle-to-engine hose from the degas bottle and remove the degas bottle.

9. To install, reverse the removal procedure.

10. Fill the degas bottle. Refer to Cooling System Draining, Filling and Bleeding Cooling System Draining, Filling and Bleeding for the recommended coolant mixture and fill level.