Why Does My Engine Overheat in Traffic?

Few things are more stressful than being stuck in traffic and suddenly noticing your engine temperature gauge rising. Overheating in these conditions is common, especially in Malaysia’s hot weather, but it can signal underlying issues that need attention.

Common Reasons Why Engines Overheat in Traffic

1. Poor Airflow to the Radiator

   When moving slowly or stuck in a jam, there’s less air passing through the radiator. If your cooling fan is weak or faulty, it won’t pull in enough air to cool the engine.

   
   

2. Low Coolant Level

   Coolant helps regulate engine temperature. If the level is low due to leaks or evaporation, your engine can quickly overheat when idling in traffic.

   

3. Faulty Radiator Fan

   The fan is crucial in traffic since the car isn’t moving fast enough for natural airflow. A malfunctioning fan motor, relay, or sensor can cause the engine to heat up.

   
   

4. Clogged Radiator or Cooling System

   Dirt, rust, or old coolant deposits can block the cooling system, reducing efficiency and causing the engine to run hotter.

   

5. Worn-Out Water Pump

   The water pump circulates coolant. If it’s failing, coolant won’t move properly, leading to overheating.

What You Can Do

• Check Coolant Regularly

  Top up if it’s low, but always ensure you use the correct type of coolant.

• Inspect the Radiator Fan

  Listen if the fan runs when your car is idling. If not, get it checked.

• Service the Cooling System

  Flush old coolant and clean the radiator to keep the system efficient.

• Turn Off the Air-Conditioner

  If overheating happens in a jam, switching off the A/C can reduce engine load.

• Pull Over if Necessary

  Never keep driving an overheating car—it can cause serious engine damage.

Conclusion

Overheating in traffic is often a warning sign, not just a one-time inconvenience. Regular maintenance of your coolant system, radiator fan, and water pump can help prevent it. Taking quick action when you see the temperature gauge rise will save you from costly repairs later on.

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