Tagantifreeze

Searching for antifreeze info? Check out all the antifreeze related articles here on the NAPA Know How blog. We’ve got Know How for all!

3 Car Fluids You Should Always Have on Hand

Posted July 31, 2020 Know How

3 Essential Car Fluids You Should Always Have on Hand

Whether you’re a seasoned mechanic or just getting into automotive DIY, you can feel confident dealing with common car fluids.

Posted June 29, 20202 Comments Maintenance

Know-How Notes: Cooling System Thermostat Replacement Tips

A thermostat that is stuck closed will quickly cause your engine to overheat. When the thermostat gets stuck open, your engine takes considerably longer to warm up. You will notice … Continue Reading Know-How Notes: Cooling System Thermostat Replacement Tips

Posted May 15, 2020 Know How

Why Is Green Fluid Leaking From a Car?

What could green fluid leaking from a car mean? Learn how to find the cause — and the solution.

Posted March 11, 2020 Know How

How To Use AlumAseal ® Radiator Stop Leak

Few things can get you down faster than a radiator leak. Aside from being a fairly pricey fix, a leaky radiator can quickly lead to overheating the engine. More often … Continue Reading How To Use AlumAseal ® Radiator Stop Leak

Posted November 8, 2019 Know How

Water vs. Antifreeze: Which Is Safest for Your Car?

Here’s what to consider when deciding between water vs. antifreeze for your car’s cooling system.

Pouring coolant into a reservoir. You may know coolant colors, like purple, green, and blue, but there's another type of coolant called Hybrid Organic Acid Technology. Here's the lowdown on these super-protective family of coolants.

Posted October 4, 2019 Know How

What Is OAT Coolant?

What is OAT coolant? Can you mix it with HOAT or IAT?

A car's radiator cap. Keep on top of your radiator's condition to ensure safe and reliable motoring all season long.

Posted August 30, 2019 Know How

4 Symptoms Of A Bad Radiator

These symptoms of a bad radiator will help you catch the culprit before it leaves you stranded.

A coolant cap on a car. There are three major types of coolant, which include HOAT, OAT and IAT. Here's how to tell the difference between the three and four things to know about HOAT.

Posted June 27, 2019 Featured

What Is HOAT Coolant? 4 Things You Need To Know

Engines are complex machines with rapidly moving metal parts and small clearances. And as such, they generate a lot of heat. You already know that coolant is an integral part of keeping your engine from exploding, and you probably also know that you have multiple coolant options that aren’t interchangeable…

Posted January 11, 2019 Know How

How Engine Coolant Works and Why Your Car Needs It

As temperatures drop, a very important liquid is at work in your car to help keep it running. Known traditionally as “antifreeze” and sometimes thought of as “coolant,” this fluid runs in a circular pattern under the hood to maintain the temperature for key components…

The lengthy grille on a Lincoln Continental shields the car's radiator.

Posted January 4, 2019 Know How

When to Replace a Car Radiator: Key Warning Signs

Your vehicle’s radiator is a vital component that helps keep the engine cool. Here are a few key signs to look for to know when to replace a car radiator.