Jeep Cherokee

 Service Manual

Cooling system » Description and operation
Cooling system

DESCRIPTION

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.

The cooling system also provides a means of heating the passenger compartment and cooling the automatic transmission fluid (if equipped). The cooling system is pressurized and uses a centrifugal water pump to circulate coolant throughout the system.

An optional factory installed heavy duty cooling package is available on most models. The package consists of a radiator that has an increased number of cooling fins. Vehicles equipped with a 2.5L/4.0L engine and heavy duty cooling and/or air conditioning also have an auxiliary electric cooling fan.

The cooling system consists of:

•  A radiator
•  Cooling fan (mechanical and/or electrical)
•  Thermal viscous fan drive
• Fan shroud
•  Radiator pressure cap
•  Thermostat
•  Coolant reserve/overflow system
•  Transmission oil cooler (if equipped with an automatic transmission)
•  Coolant
•  Water pump
•  Hoses and hose clamps

Cooling system circulation for 2.5L/4.0L models is shown in (Fig. 1).

Fig. 1 Coolant Circulation-2.5L/4.0L Engines

1 - HEATER CORE
2 - TO COOLANT RESERVE/OVERFLOW TANK
3 - THERMOSTAT HOUSING
4 - RADIATOR
5 - WATER PUMP

Cooling system

Automatic transmission oil cooler

Coolant reserve/overflow system

Cooling system fans

Block heater

Thermostat

Radiator

Radiator pressure cap

Water pump

Hose clamps

Viscous fan drive

Electric cooling fan