Engine Cooling System: Description: Description: Notes

Fig 1: Naturally Aspirated Engine Coolant Flow

Courtesy of CHRYSLER LLC

1 - RETURN TUBE	9 - SECONDARY THERMOSTAT
2 - UPPER PLENUM	10 - CYLINDER BLOCK
3 - HEATER CORE	11 -TRANSMISSION OIL COOLER
4 - LOWER PLENUM	12 - UPPER RADIATOR HOSE
5 - PRIMARY THERMOSTAT	13 - WATER PUMP
6 - LOWER RADIATOR HOSE	14 - CYLINDER HEAD
7 - ENGINE OIL COOLER	15 - COOLING FANS
8 - PRIMARY THERMOSTAT BYPASS	16 - RADIATOR

The cooling system regulates engine operating temperature. It allows the engine to reach normal operating temperature as quickly as possible, maintains normal operating temperature and prevents overheating.