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How to Remove Overfilled Coolant (Step-by-Step)

Updated: Feb 2

✔ This article has been fact checked.

The engine coolant is a vital component of any vehicle's cooling system. It helps to keep the engine running at a safe temperature by absorbing and dissipating heat. However, if the coolant level becomes too high, it can lead to a variety of problems.

If you notice the coolant in the reservoir is too high, you should first wait for the engine to cool down. Once cooled, you can either use a syringe or use the radiator drain valve to remove the overfilled coolant.

In this article, we will discuss how to remove overfilled coolant, as well as the causes and effects of an overfilled coolant reservoir.

Table of Contents:

person twisting a car coolant expansion tank

What to Do if You Overfill Your Coolant Reservoir?

If you notice that your coolant level is above the maximum line, it is important to take immediate action.

  • The first step is to turn off the engine and allow it to cool down.

  • Once the engine is cool, open the hood and locate the coolant reservoir.