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Signs That Your Car Is Leaking Coolant 

Coolant leaks

Engine coolant is a fluid that regulates the temperature of the vehicle’s engine to prevent overheating. It absorbs heat from the engine and transfers it to the radiator, where the airflow cools it down. The coolant travels back to the engine, and the process repeats continuously.  

Coolant is a mixture of propylene glycol or ethylene and water in a 50-50 ratio. Its main role is to prevent engine damage due to freezing, overheating, or corrosion. The coolant also lubricates moving parts to protect other components, such as the water pump, cylinder, and head gasket. 

Coolant leaks can lead to serious engine problems. So, it is important to learn to identify the signs of a coolant leak and the steps to take if you have one. Here are some signs that your vehicle has a coolant leak:  

Coolant warning light 

When the coolant level is low, the coolant warning light on the dash will turn on. While your vehicle would appear to be running normally even when the indicator is on, you must stop driving immediately. With low coolant levels, there is a high risk of engine overheating and serious engine damage.  

Puddle/spots under the vehicle 

In most instances, the puddle under your parked vehicle is just water from condensation. However, if the spot is green, blue, orange, yellow, or pink, it could be coolant leaking from the radiator, water pump, hose, or gasket.  

White smoke from exhaust 

When there is a coolant leak, the coolant and engine oil can mix and create white smoke. You will notice white smoke from your exhaust, indicating a problem with the cooling system.  

Discoloration or rust on the radiator 

Discoloration or rust spots on the radiator can be caused by fluids leaking from the radiator. Whenever there is a leak and the fluids land on the hot parts of the engine and burn off, it leaves discolored spots on it. These spots then begin to rust.  

Sweet smell 

Even if you don’t see any spots under the vehicle, you can detect a coolant leak with its smell. If you notice a sweet smell from outside the vehicle after you have driven it, it could be from a coolant leak. You might also be able to smell the coolant from behind the wheel. 

Common causes of coolant leaks  

There could be various reasons behind a coolant leak, and it is best to take your vehicle to a mechanic so that they can pinpoint the source and fix it. However, it is a good idea to be aware of the things that can go wrong and lead to a leak.  

Hole in the radiator 

One of the most common causes of coolant leaks is a hole in the radiator. The radiator is located in the front of the vehicle and goes through a lot of wear and tear. An external impact from a collision or a rock or other debris on the road can punch a hole in the radiator.  

Faulty radiator cap

Sometimes, a faulty radiator cap seal breaks down and causes a leak. Other sources of leaks could be the hose, water pump, or engine gaskets.  

Usually, it is not easy to identify a leak and pinpoint the source, so the task should be left to the professionals. As soon as you suspect a coolant leak, stop driving your vehicle immediately and let a mechanic have a look.  

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