Engine Overheating
When the temperature gauge goes into the red zone or steam starts coming from under the bonnet, it means the engine is overheating. Ignoring this symptom can lead to serious damage as engine parts deform from high temperatures. This is a common issue that requires immediate attention.
Likely causes — most common first
Faulty Thermostat (Cooling Valve)
The thermostat is responsible for circulating coolant. If it gets stuck in the closed position, the liquid only circulates within the engine, not reaching the radiator for cooling.
Low Coolant Level or Leak
Due to cracks in hoses, the radiator, or worn-out gaskets, the liquid leaks out, and there's simply not enough to cool the engine.
Radiator Fan Failure
The fan helps cool the liquid in the radiator when the car is in traffic or moving slowly. If it doesn't turn on due to a blown fuse or sensor, the engine starts to overheat.
Clogged Radiator
The radiator can get clogged with dirt, fluff, or insects from the outside, or with scale from poor-quality fluid from the inside. This prevents air from flowing through and heat from being dissipated.
Worn-out Water Pump
The pump makes the coolant move through the system. If its blades are broken or the belt tension is lost, circulation stops.
