What Causes a Dodge Caravan to Overheat?

A Dodge Caravan will overheat for three main reasons--coolant-circulation issues, cooling fan failure and engine malfunction. The main components of the cooling system on the vehicle include a radiator, water pump, cooling fan, thermostat and engine sensors.

Coolant Circulation Issues

Circulation issues can include a bad water pump, a stuck thermostat or a faulty radiator cap. Loss of coolant from a leaking radiator, worn hoses, missing freeze plugs or a broken overflow tank will result in overheating due to an inadequate flow of fluid.

Cooling Fan Failure

An electrical cooling fan is used on the Dodge Caravan to transfer the heat from the coolant in the radiator. This fan may fail to run due to an electrical-relay issue, a wiring issue, temperature sensor failure or electric motor burn-out. Debris in the radiator or fan housing may also reduce the cooling effect of the fan.

Engine Malfunctions

Engine malfunctions may cause or contribute to the overheating. Improper timing will create more heat than a normal cooling system can handle. Failure of a head gasket will not allow pressurization of the cooling system and mix the oil and water.

Impact of Overheating

When the van overheats, it can cause many serious issues and should be turned off as soon as possible. Overheating can cause head gasket failure, bearing failure or a seized engine.

Cooling System Maintenance

Basic maintenance of the Caravan's cooling system will increase the life of your vehicle. This should include monitoring coolant levels monthly when the engine temperature is cool. Replace radiator hoses and the thermostat as suggested in the owners manual. Radiator fluid should be changed as directed by the manufacturer or sooner if used for towing or in adverse climates.