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5 Typical Reasons of Engine Overheating

5 Typical Reasons of Engine Overheating
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Engine overheating could be the possible consequences of several problems including a blocked radiator, cracked cooling system, botched water pump, or a bad thermostat. Most car engines operate between 195°F and 220°F range. Any defect with these components can cause this temperature to rise beyond the normal level, leading to the overheating of your car.

The Typical Reasons of Engine Overheating

It must be annoying when you are driving to catch an urgent meeting but suddenly steam starts spewing from under the hood, and you have to pull over somewhere. What is more terrifying is the possibility of an expensive fix because overheating could be extremely damaging for various parts in your car. Let’s find out some causes of the engine overheating:

1. A Leak in the Cooling System

The main culprit is the air that enters the system through the leak. The coolant drips through the puncture, creating space for air to get sucked in. The air takes the shape of a big bubble, known as an airlock, and occupies the top part of the system. The coolant can’t push through it to reach the engine, causing the overheating.

Troubleshoot Car Overheating Causes
A coolant system lea causes the engine to heat up quickly.

2. Condensed Coolant

It’s an annoying problem in cold weather, especially in those places where temperature drop below the freezing point. If the coolant is not high-quality, it can get concentrated and cause a blockage. Such a condition will result in engine overheating and damage the radiator.


3. Blockage to Coolant Circulation

It can bring about the same symptoms of the gelled coolant. Sometimes, a defected thermostat, mineral deposit, or a foreign object can block the liquid from flowing through the radiator to disperse heat.

4. Low Level of Oil

Engine oil itself helps with the cooling process and prevents the buildup of excessive heat. In fact, the fuel removes 75% to 80% of the unused heat in the engine. It also keeps various parts properly lubricated, reducing friction and the subsequent overheating.

5. Broken-Down Water Pump

It’s one of the most frequent reasons of engine overheating. It is a component that actively takes part in maintaining coolant circulation. It can wear out or break over time, leading to the damage of the impeller that does not turn anymore.

Engine Overheating
Broken water pump could be another reason of engine overheating.

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How to Troubleshoot Car Overheating Causes

As you already know about the issues that trigger engine overheating, you will know where to look when a temperature malfunction arises. You should check:

  • The coolant system
  • Level of engine oil
  • Radiator
  • Thermostat
  • Water pump

Any trouble with these things often brings out the heat issue. The measures you can take are to:

  1. Flush the cooling system when it’s dirty or at the time recommended by the manufacturer
  2. Examine the cooling structure for leakage or any other fault
  3. Fill up the tank or change the oil regularly
  4. Inspect the radiator, thermostat, and water pump for any damage

Check out this video to know how to fix a car overheating engine

If you don’t feel confident, let an experienced technician diagnose your vehicle. Even if it overheats for once, you should have it checked and fixed.
Hopefully the information will be useful for you. Next time, don’t forget to read more car maintenance tips on Car From Japan.

  1. Koholo says

    a faulty gasket, crack in the blocker and crack on the cylinder head are the major ones that my mechanics report

  2. marwa r. kibwabwa says

    My car type is toyota ipsum it doesn’t cool infront of the sit, but it cools back sit or rear sit whats is the problen in front cooling system

  3. Mwale mabvuto says

    Thanks a lot for giving us very important information.I wanted to find out what is the best engine oil on Toyota vits 2006 model most of the cars provided by you guys,you don’t provide car manual books. Your assistance will be highly appliciated.

  4. greoffrey says

    failed cooling fan at the back of radiator also contributes over heating

  5. Charles says

    My truck is Toyota hiace 5L overheating when climbing up hill but only when loaded,it has no leakage on radiator. What’s the problem?

  6. Thabang says

    My car is toyota runx 140 , the engine is over heating but the gauge is in the middle of cold nd hot , water is boiling on radiator reservoir

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