How to Check Coolant Level

No one wants to find themself somewhere in Glendora stranded by the side of the road because their car has overheated. That’s why it is so important to check your car’s coolant. What is coolant? And how do you check it? Our Service Team wants to help you keep your car running in top shape. So, we’re here to answer your questions. We’ve put together this handy guide on how to check the coolant level in your car. And if you’re wondering “What is coolant?” we’ll answer that, too.

What is Coolant?

Coolant is vital to keeping your car from overheating. So, what is coolant? Coolant, also known as antifreeze, is an ethylene glycol based chemical that when mixed with water will even out the internal temperature during extreme external temperatures. But, it does more than that. It prevents corrosion of various components as it is pumped through the engine as well.

How to Check Coolant Level in Three Easy Steps

One thing our Service Managers always tell our Covina customers is to never open a radiator cap when it is hot. You can get seriously burnt if the coolant sprays out, which it will if the engine is hot. Fortunately, you don’t have to remove the radiator cap just to check the fluid. This is how to check the coolant in your car the safe way:

1. Locate the plastic reservoir. The reservoir will be a partially clear plastic container that is connected by a hose to the radiator. There should be markings along the side.
2. Check where the fluid level is sitting, compared to the markings on the reservoir. If the fluid level reaches the “full” mark, the coolant level is fine.
3. Refill the coolant if necessary. If the fluid falls short of the “full” line, top off the coolant.

How to Refill the Coolant

Follow these steps to refill the coolant:

When the engine has been off for a while and has cooled down completely, remove the radiator cap; remember: never remove a radiator cap when an engine is still warm.

1. Mix the coolant with water if necessary. Check the label to see if your coolant is pre-mixed. If not, mix it with water to a 50/50 ratio. Never fill your radiator with pure coolant.
2. Turn on the engine. This seems counter-intuitive, but you want the coolant circulating as you fill the radiator. It will only circulate while the engine is running.
3. Fill the radiator with mixed coolant. Fill the radiator up to where the cap goes. Replace the cap.

Check Our Website for More Helpful Tips

If you found this guide helpful, you’ll probably enjoy our other guides, like “How Often Should You Rotate Your Tires?” and “Why is My Car Overheating?” Our Service Team at Mercedes-Benz of West Covina is proud to serve the La Puenta area and will be glad to help you with your car maintenance needs. So, contact us today!