What Are the Signs of a Coolant Leak?
Finding a Coolant Leak Early
Coolant leaks often start small. Many drivers don't notice a problem until their vehicle is overheating or the warning light shows up. Knowing what signs to watch for can help you catch a coolant leak early, before it turns into a more expensive repair.
“A lot of drivers don't realize they have a coolant leak until their temperature gauge starts climbing or they see steam coming from under the hood. The sooner we find the source of the leak, the better. Catching a leaking hose, radiator, or water pump early is usually much easier and less expensive than dealing with an overheating engine."
— Zach Haver, Owner, Mad Hatter Auto Repair
What Does Coolant Do?
Coolant helps regulate your engine's temperature by moving heat away from the engine and releasing it through the radiator. When your coolant is low, your engine can have trouble staying cool.
Many people think coolant and antifreeze are the same thing. In most vehicles, coolant is a mixture of antifreeze and water that helps regulate engine temperature year-round. During the winter, it helps keep your engine from freezing. During the summer, it helps keep your engine cool and helps prevent overheating.
Is the Leak Coolant?
One thing that can make coolant leaks confusing is that it comes in several different colors. This can depend on the vehicle manufacturer and the type of coolant that you’re using. Coolant may be green, orange, yellow, pink, blue, or purple.
Since coolant can vary from one vehicle to another, color alone isn't always enough to identify it. Something else you can look for is the smell. Coolant often has a sweet smell. You may also notice that it feels slippery to the touch.
Not Every Puddle Is Coolant
Finding liquid underneath your vehicle can be alarming. However, not every puddle means something is wrong. During the summer months, it's normal to see clear water dripping underneath your vehicle. This can come from condensation when you’re running the A/C. It’s a normal part of how your air conditioning system works.
If you find a puddle underneath your car and you don’t know what it is, our team can help identify it. We can help you determine whether or not it’s urgent, and what repairs may be needed.
Where Coolant Leaks Commonly Occur
Coolant leaks can come from several different parts of the cooling system. Common sources include radiator hoses, the radiator itself, the water pump, the thermostat housing, the coolant reservoir, or hose connections.
In some cases, a coolant leak may cause white smoke or sweet-smelling vapor from the exhaust. This can indicate that coolant is entering the engine, and your vehicle should be inspected right away.
Signs of a Coolant Leak
Some common warning signs include:
- A puddle underneath your vehicle
- A sweet smell coming from the engine area
- Low coolant levels
- A temperature gauge that is running higher than normal
- Steam coming from under the hood
- A coolant warning light on the dashboard
If you notice any of these warning signs, it's a good idea to have your vehicle inspected before the problem gets worse.
Checking Your Coolant Reservoir
Important: Never remove the radiator cap or cooling system cap when the engine is hot, as the system may be under pressure. Opening it too soon can release hot coolant and steam, which may cause serious burns.
Once the engine has cooled down, it’s safe to check the coolant level. Most vehicles have a coolant reservoir located under the hood. If you're unsure where yours is located, your owner's manual can usually help you find it.
If you notice that your coolant level continues to drop over time, there may be a leak somewhere in the cooling system. Common leak sources can include hoses, the radiator, the coolant reservoir, or even the water pump. Getting your vehicle inspected will help determine if there’s a leak and where it’s coming from.
Don't Ignore Small Leaks
Small coolant leaks rarely stay small forever. Over time, a minor coolant leak can become a larger cooling system problem or lead to overheating. The sooner a leak is found, the easier it can be to get it repaired.
If you've noticed signs of a coolant leak, our team can help identify the source of the problem and recommend the right repair plan for your vehicle.
If you'd like to learn more about what can happen when coolant levels get low, check out our blog, What's Causing My Car to Overheat?.
To schedule an appointment in Omaha, call (402) 330-2286, and in Council Bluffs call (712) 322-7500. You can also schedule an appointment online using our Scheduling Tool.