5 Reasons Your Engine May Be Overheating

 With thousands of controlled mini-explosions happening every time you drive, combustion engines will always be hot. But if the temperature under your hood exceeds the acceptable threshold of approximately 220 degrees, something’s not right.

Engine overheating is a relatively common issue drivers face – especially those with older vehicles. However, the results can be disastrous if you don’t take the problem seriously and identify the component that’s causing the problem. This article discusses five potential causes of engine overheating and explains the warning signs to look out for.

1. Low Coolant Levels

Coolant, also known as antifreeze, performs the essential function of regulating your engine’s temperature. This liquid (water and ethylene glycol or propylene glycol) circulates throughout your engine and absorbs excess heat from engine components. If you notice your vehicle is “running hot,” the coolant reservoir is the first thing you should check (after letting your car cool down).

There are several reasons why your coolant levels may be low, including a leak, radiator cap issue, evaporation, or a faulty thermostat. If you’re unable to identify the cause, visit your nearest Dobbs location, and our expert and certified technicians will help you find the source of the problem and provide the most affordable fix.

2. Low Engine Oil

Engine oil lubricates engine components, reducing heat-causing friction. In addition, it also helps dissipate heat from internal parts. Like coolant, oil absorbs heat and carries it away from critical areas that are vulnerable to overheating.

Low oil levels can create “hot spots” within the engine, which are just like they sound. Over time, the engine components in these spots wear down, increasing the strain on other parts that try to compensate.

3. Internal Debris

Metal shavings, carbon deposits, oil sludge, dirt, and dust can wreak havoc on your engine. Different types of debris can block the narrow passage through which coolant flows and prevent it from circulating correctly, leading to overheating.

But engine debris doesn’t just impact the coolant passages – it can also cause problems with your oil’s ability to reduce friction. If certain particles get into the oil filter, it impairs the lubrication process that aims to reduce friction. The result? Excess heat.

Because it happens gradually over time, it’s hard to know when engine debris buildup is reaching critical levels. However, if you notice the needle on your temperature gauge is consistently higher than average (which should be about halfway between hot and cold), have a mechanic look things over.

4. Damaged Radiator

Your vehicle’s radiator performs several essential functions and is arguably the most critical component in the cooling system.

 As an engine runs, circulating coolant absorbs heat from friction and combustion. The hot coolant is then pumped into the radiator, passing through thin tubes surrounded by metal fins. These fins increase the radiator’s surface area, allowing the heat from the coolant to transfer to the surrounding air. After the coolant is cooled by the air flowing through the radiator, it is pumped back into the engine to absorb more heat, and the cycle repeats.

There are several signs of radiator damage to look out for in addition to engine overheating, including coolant leaks or poor cabin heating during colder weather. If you notice any of these symptoms, pull over as soon as you can. In many cases, driving even a short distance can have serious consequences.

5. Faulty Thermostat

Engine cooling system thermostats perform a function similar to that of home thermostats: temperature regulation. When the engine is cold, the water pump circulates engine coolant only within the engine. As the engine coolant absorbs heat from the cylinders, it eventually reaches whatever temperature the automaker has set for efficient operation.

A damaged thermostat prevents the coolant signaling from taking place, meaning it won’t properly circulate throughout your engine, leading to overheating. Pay attention to the thermometer gauge on your dashboard. If it’s not functioning properly, it’s time to visit a professional. The expert and certified technicians at Dobbs can replace a faulty thermostat and save you thousands of dollars in potential engine damage down the road.  

Stay Cool by Visiting a Dobbs Tire and Auto Near You

If you’re experiencing overheating issues with your vehicle, don’t take chances by continuing to drive it. Though fixing the problem can vary in terms of cost, one thing is certain: it’s going to be less expensive than replacing your entire engine. The expert and certified technicians at the 43 convenient Dobbs Tire & Auto locations have the experience to find the most cost-effective fix and get you back on the road as quickly as possible. Use our store locator tool to find the nearest location, and contact us today to schedule your appointment!