A loss of the coolant

Add the coolant.

A weak coolant solution

Confirm that the coolant solution is a 50/50 mixture of ethylene glycol and water.

Any dirt, any leaves, or any insects on the front of the radiator

Clean the front of the radiator.

The leakage from the hoses, the coolant pump, the heater, the thermostat housing, the radiator, the heater core, or the head gasket.

Replace any damaged components.

A faulty thermostat

Replace a damaged thermostat.

Delayed ignition timing

An improperly operating electric cooling fan

Replace the electric cooling fan.

Plugged or rotted radiator hoses

Replace any damaged radiator hoses.

A faulty water pump

Replace a faulty water pump.

A faulty surge tank cap

Replace a faulty surge tank cap.

A cracked or plugged cylinder head or engine block

Repair the damaged cylinder head or the damaged engine block.

A faulty radiator

Replace a faulty radiator.