How to Fix Car Overheating
Learn how to fix car overheating with our detailed step-by-step guide. Follow our easy instructions to get it done right.
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0 of 6 steps completedStep-by-Step Instructions
1 Step 1: Check Coolant Level
Step 1: Check Coolant Level
When engine is cold, check coolant reservoir and radiator - top off if low with 50/50 mix.
Engine Coolant 50/50
Pre-mixed antifreeze/coolant for topping off
Coolant Funnel
No-spill funnel for adding coolant to radiator
2 Step 2: Inspect for Coolant Leaks
Step 2: Inspect for Coolant Leaks
Look under car for puddles, check hoses, radiator, water pump, and heater core for leaks.
UV Coolant Leak Detector
UV dye and light for finding coolant leaks
3 Step 3: Test Thermostat Function
Step 3: Test Thermostat Function
Check if upper radiator hose gets hot - if stays cold, thermostat may be stuck closed.
Engine Thermostat
Replacement thermostat for your vehicle
Thermostat Gasket
Gasket for thermostat housing seal
4 Step 4: Check Radiator Fan Operation
Step 4: Check Radiator Fan Operation
Verify cooling fans turn on when engine reaches operating temperature.
Cooling Fan Relay
Replacement relay for electric cooling fan
5 Step 5: Inspect Water Pump
Step 5: Inspect Water Pump
Look for coolant leak from water pump weep hole or bearing noise/play indicating failure.
Water Pump Assembly
Replacement water pump with gasket
6 Step 6: Test Radiator Cap and Flush System
Step 6: Test Radiator Cap and Flush System
Replace radiator cap if weak, consider coolant flush if system is dirty or contaminated.
Radiator Cap
Replacement pressure cap for cooling system
Radiator Flush Kit
Chemical flush for cleaning cooling system