radiator overheating

Radiator overheating? Pull over before you cook the head gasket and your wallet.

• Low coolant or a leak: top up with the correct mix and fix the leak—radiator, hoses, or cap.
• Thermostat stuck shut: engine heats up fast and stays that way; replace it.
• Cooling fan not working: blown fuse, dead relay, dodgy fan motor, or a sulky temp sensor.
• Blocked radiator or fins: inside clogged with gunk, outside full of bugs; flush and clean.

If it still runs hot, suspect a failing water pump or a head gasket—both need swift attention. Never crack the radiator cap when it’s hot; let it cool, then check levels or call a tow.