Diagnose and Prevent Car Engine Overheating

Cost Savings

Checklist Tasks

• Safely pull over and turn off engine to prevent serious engine damage.
• Allow engine to cool, then check coolant reservoir for leaks or low level.
• Inspect radiator cap for worn seals or pressure loss that could cause leaks.
• Look for debris or damaged fins blocking airflow to the radiator.
• Check hoses for softness, collapse, or leaks indicating failure risk.
• Look under the car for coolant puddles near water pump or heater core.
• Test radiator fan operation by running engine with AC on.
• Watch temperature gauge for erratic readings to spot thermostat or sensor faults.
• Inspect serpentine belt for cracks or slackness affecting water pump.
• Sniff for sweet or burnt odors signaling leaks or overheated fluid.
• Check oil dipstick for milky appearance indicating head gasket failure.
• Run heater; no hot air with high temperature suggests low coolant or trapped air.