how to put coolant in car radiator

That little temperature gauge on your dashboard is not something to ignore. When it starts creeping into the red, it’s a clear sign your engine is getting too hot, and the culprit is often low coolant. Coolant, also known as antifreeze, is the lifeblood of your car’s cooling system, circulating through the engine to absorb excess heat. Knowing how to put coolant in car radiator is a fundamental skill that can save you from a costly repair and a stranded-on-the-side-of-the-road situation.

The Essential First Step: Let Your Engine Cool

This is the most critical safety rule. Never attempt to open the radiator cap on a hot engine. The cooling system is pressurized, and opening it while hot can cause a violent eruption of scalding coolant. Always let the engine cool down completely before you begin. A good rule of thumb is to wait until you can comfortably rest your hand on the radiator hose.

How to Put Coolant in Your Car Radiator

Once the engine is cool, locate the radiator. It’s usually at the front of the engine bay with a fan behind it. Find the radiator cap; it’s often larger than other caps and may have a warning symbol. Place a thick cloth over the cap and slowly turn it counterclockwise until it hits the first stop. This allows any remaining pressure to escape with a hiss. After the pressure is gone, press down and continue turning to remove the cap completely.

Now, look for the coolant reservoir, a translucent plastic tank with “Full” and “Low” markings. Check the coolant level against these marks. If the radiator itself is low, you can carefully pour a 50/50 mix of coolant and distilled water directly into the radiator neck until it’s full. Avoid using plain tap water, as minerals can cause corrosion. Then, top up the reservoir to the “Full” line.

Choosing the Right Coolant for Your Car

Not all coolants are created equal. Using the wrong type can damage your cooling system. Your vehicle’s owner’s manual will specify the correct coolant for your model. You’ll typically find options like an extended-life orange coolant or a conventional green formula. When in doubt, ask for help at an auto parts store to ensure you get the right one.

When to Check and Top Up Your Coolant

Make a habit of visually checking your coolant reservoir level every time you check your oil. It’s a quick and easy preventative measure. If you find you’re constantly adding coolant, this could indicate a small leak. In that case, it’s a good idea to have a professional mechanic inspect your system to find the source.

Keeping your coolant at the proper level is a simple yet vital part of car maintenance. By following these safe steps, you can confidently manage your cooling system, helping to ensure your engine runs smoothly for many miles to come.