Coolant fan inoperative

Refer to Low Engine Coolant Indicator Always On .

Thermostat stuck closed

Replace the thermostat.

Radiator fins obstructed

Surge tank outlet hose pinched or kinked (at radiator)

Incorrect radiator

Refer to the radiator usage chart in a parts catalog. If needed, replace with the correct radiator.

Loss of system pressure

Damaged or missing air seals or deflector

Repair or replace as required.

Malfunctioning coolant pump

Replace the coolant pump. Refer to Water Pump Replacement .

Air trapped in cooling system

Refill the cooling system.