Engine Cooling System: Engine: Pump-Water: Description: Description
| 1 - FROM HEATER |
| 2 - FROM RADIATOR |
| 3 - TO WATER PUMP |
| 4 - ENGINE BYPASS |
| 5 - THERMOSTAT |
The 3.7L engine uses an internal water/coolant bypass system. The design uses galleries in the timing chain cover to circulate coolant during engine warm-up preventing the coolant from flowing through the radiator. The thermostat uses a stub shaft located at the rear of the thermostat to control flow through the bypass gallery.