What Should You Do If Your Coolant Is Low?

Learn the steps to take when your vehicle's coolant level is low to prevent overheating and engine damage.

Published Apr 11, 2025

Overview

Understanding what to do when the coolant is low is essential for maintaining your vehicle's health and preventing engine damage. In this video, we provide step-by-step guidance on checking coolant levels and taking appropriate action to address low coolant situations. Whether you're a seasoned mechanic or a new car owner, knowing how to manage coolant levels is crucial for optimal engine performance and longevity. This topic is particularly relevant as vehicle maintenance continues to be a priority for car owners looking to avoid costly repairs.

Video transcript

Check levels by opening the coolant reservoir when the engine is cool. If low, add a 50/50 mix of antifreeze and water to the maximum fill line. Inspect for leaks such as puddles under your vehicle or a strong coolant odor, and ensure clamps and hoses are secure. If the problem persists, it’s advisable to have your cooling system checked by a professional to prevent overheating and potential engine damage.

Questions and answers

How can I tell if my coolant level is low?
You can check the coolant level by opening the coolant reservoir when the engine is cool. If the coolant is at or below the minimum fill line, it is considered low.
What should I do if my coolant is low?
If your coolant is low, add a 50/50 mix of antifreeze and water until it reaches the maximum fill line.
What are the signs of a coolant leak?
Signs of a coolant leak include puddles under your vehicle, the presence of a strong coolant odor, and visible moisture around hoses or clamps.
When should I consult a professional about my cooling system?
If your coolant problem persists or you notice frequent low levels, overheating, or other issues, it’s advisable to consult a professional mechanic to check your cooling system.