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What would cause my car to run hotter than normal?

If your car is running hotter than usual, it could be a sign of an underlying issue that needs to be addressed. There are several common reasons why a car's engine temperature may be higher than normal, and identifying the cause is crucial to prevent further damage.


Potential Causes of Overheating



  • Coolant System Issues: A problem with the coolant system, such as a leak, a faulty water pump, or a clogged radiator, can prevent the engine from being properly cooled, leading to overheating.

  • Thermostat Malfunction: The thermostat is responsible for regulating the flow of coolant to the engine. If it is stuck closed, it can prevent the coolant from circulating and cause the engine to overheat.

  • Radiator Fan Failure: The radiator fan helps draw air through the radiator to dissipate heat. If the fan is not working correctly, the engine may not be able to cool down effectively.

  • Excessive Engine Load: Driving in hot weather, towing a heavy load, or climbing steep hills can put additional strain on the engine, causing it to run hotter than normal.

  • Low Coolant Level: If the coolant level in the system is low, the engine may not be receiving enough coolant to keep it from overheating.


It's important to address any issues with the cooling system as soon as possible to prevent further damage to the engine. If you notice your car running hotter than normal, it's best to have it inspected by a qualified mechanic.


Diagnosing and Addressing Overheating Issues


To diagnose the cause of the overheating, a mechanic may perform the following steps:



  • Check the coolant level and inspect the coolant system for any leaks or blockages.

  • Test the thermostat to ensure it is opening and closing properly.

  • Inspect the radiator fan to make sure it is functioning correctly.

  • Perform a pressure test on the cooling system to identify any potential issues.

  • Check for any signs of excessive engine load, such as worn or damaged components.


Once the underlying cause has been identified, the mechanic can then recommend the appropriate repairs or maintenance to address the overheating issue and restore the engine to its normal operating temperature.

Why is my car overheating but coolant is full?


If your engine is overheating but the coolant is full, there may be an issue with the radiator or cooling system as a whole. This could be caused by anything from a mechanical fault of the radiator fan to a damaged expansion tank.



Why is my car running hotter than usual?


When the cooling system isn't functioning properly, the temperature of your engine can get too hot. Proper maintenance of your cooling system can help optimize the performance and longevity of your engine and help prevent damage of overheating the engine.



How to fix high engine temperature?


Cool an overheated engine by pulling the car over, popping the hood, turning the car off and letting the engine sit for 15 to 30 minutes. Avoid taking the radiator cap off of an overheating engine or driving with an overheated engine, using advice from a certified mechanic in this free video on auto repair. Expert: Th.



How to tell if your thermostat or water pump is bad?


Here are signs you've got a bad pump or thermostat.

  1. Corroded Cooling System Parts. Both of these cooling system parts can get corroded if they start to leak slowly.
  2. Leaking Engine Coolant.
  3. Erratic Temperature Changes.
  4. Poor Coolant Circulation.
  5. Overheating Constantly.



Can low oil cause overheating?


Without the right amount of oil, your engine becomes more vulnerable to overheating. Since there's not enough oil circulating through the engine, there's no way for the engine to shed that excess heat. This can lead to heat soak, where certain engine components overheat and eventually deform due to the stress.



How do I diagnose what's making my car overheat?


If an overheating problem started suddenly, or running hot is inconsistent, you might be dealing with a failing thermostat. If the radiator is boiling over, the problem can often be traced back to a faulty radiator cap. The cap is rated to release pressure at a specific temperature.



How long can a car overheat before damage?


about a quarter-mile
You can only drive an overheating car about a quarter-mile or 30-60 seconds. If you notice any of the warning signs mentioned above, it's not advisable to continue your journey. Instead, you should call a recovery truck and get towed to a local garage for a repair.



What are the symptoms of a bad thermostat in a car?


Accurate Auto lists these signs below.

  • Odd Temperature Gauge Readings. Your temperature gauge should register cold when you first start your car and slowly build up to normal as the engine warms up.
  • Air Temperature Changes.
  • Coolant Leaks.
  • Strange Sounds.
  • Heater Problems.



Can I drive my car with high engine temp?


If your car is overheating, you should definitely not drive it. This could be due to several factors, including low coolant levels or a faulty cooling system. Driving an overheated car puts additional strain on the engine, leading to further damage and costly repairs down the road.



Why is my car getting hot but not overheating?


You may have a partially or mostly plugged radiator. You may have a failing thermostat. You may be low on coolant. Your fan may not be working properly. Your water pump may be failing. It's even possible that your temp gauge isn't working properly and your cooling system is fine.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.