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Coolant Reservoir Cap Missing (What to Do)

Updated: Jan 13

A coolant reservoir cap is an essential component of a car's cooling system. It plays a crucial role in maintaining the pressure and level of the coolant in the system. The coolant reservoir cap is a small but vital part of the car that is often overlooked.

It is important to understand the implications of a missing coolant reservoir cap and what to do if you find your coolant cap is missing.


Table of Contents:

a yellow coolant reservoir cap

What Is a Coolant Reservoir?

A coolant reservoir, also known as a radiator overflow tank, is a component of a vehicl