How To Burp Coolant System: A Step-By-Step Guide

If you’re experiencing overheating issues with your car, it’s likely that you need to burp your coolant system. Burping your coolant system is the process of removing air pockets that have formed in the cooling system. This article will guide you through the steps of how to burp coolant system.

What is a Coolant System?

A coolant system is a vital component of any car. It is responsible for keeping the engine cool and preventing it from overheating. Coolant flows through the engine and absorbs heat, which is then transferred to the radiator where it is cooled down. The cooled coolant is then recirculated back into the engine to repeat the process.

Why Burp a Coolant System?

Air pockets can form in the coolant system, which can prevent the coolant from flowing properly. This can lead to overheating and potential damage to the engine. Burping the coolant system removes these air pockets and ensures that the coolant can flow freely throughout the system.

How to Burp Coolant System – Step by Step Guide

Step 1: Park Your Car on a Level Surface

Make sure that your car is parked on a level surface. This will ensure that the coolant is distributed evenly throughout the system.

Step 2: Let the Engine Cool Down

Never attempt to burp a coolant system when the engine is hot. Wait until the engine has cooled down completely before you start the process.

Step 3: Locate the Coolant Reservoir

Locate the coolant reservoir under the hood of your car. The reservoir is usually a white plastic container with a cap that says “coolant” or “antifreeze.”

Step 4: Check the Coolant Level

Check the coolant level in the reservoir. If the level is low, add coolant until it reaches the “full” mark.

Step 5: Open the Coolant Reservoir Cap

Remove the cap from the coolant reservoir. This will allow air to escape while you burp the coolant system.

Step 6: Start the Engine

Start the engine and let it idle for a few minutes. This will help to circulate the coolant throughout the system.

Step 7: Turn the Heater On

Turn the heater on to the highest setting. This will help to circulate the coolant through the heater core and remove any trapped air.

Step 8: Squeeze the Radiator Hoses

Squeeze the radiator hoses to help move the coolant through the system. This will also help to remove any air pockets.

Step 9: Monitor the Coolant Level

Monitor the coolant level in the reservoir. As the coolant circulates through the system, it may drop slightly. If it drops too low, add more coolant until it reaches the “full” mark.

Step 10: Check for Bubbles

Watch for bubbles in the coolant reservoir. If you see bubbles, this is a sign that there is still air in the system that needs to be removed.

Step 11: Rev the Engine

Rev the engine a few times to help circulate the coolant and remove any remaining air pockets.

Step 12: Turn Off the Engine

Turn off the engine and let it cool down.

Step 13: Check the Coolant Level Again

Check the coolant level again and add more coolant if necessary.

Step 14: Replace the Coolant Reservoir Cap

Replace the cap on the coolant reservoir.

Step 15: Clean up Any Spills

Clean up any spills that may have occurred during the process.

Step 16: Test Drive Your Car

Take your car for a test drive to make sure that it is running smoothly and that there are no more overheating issues.

Step 17: Repeat the Process if Necessary

If you still experience overheating issues, repeat the process of burping the coolant system.


Q: How often should I burp my coolant system?

A: It’s recommended that you burp your coolant system at least once a year to prevent any air pockets from forming.

Q: Can I burp my coolant system myself?

A: Yes, you can burp your coolant system yourself as long as you follow the correct steps and precautions.

Q: Can I drive my car if there are air pockets in the coolant system?

A: No, it’s not recommended to drive your car if there are air pockets in the coolant system as this can lead to overheating and potential damage to the engine.


Burping your coolant system is an important maintenance task that should be performed regularly to ensure that your car is running smoothly and to prevent overheating issues. By following the step-by-step guide outlined in this article, you can easily burp your coolant system and keep your car in top condition. Remember to always take the necessary precautions and to never attempt to burp a coolant system when the engine is hot.