Most people can find the radiator pressure cap on their vehicle, but do you know how it works? Perhaps you've heard others discuss using a higher pressure cap for various reasons and wondered if the cap was for more than just show. The fact is radiator caps play an important role in a pressurized cooling system and there are many factors that you must keep in mind when making changes to that system. We'll discuss how a pressure cap works and how it can both improve or hurt your system.
Before we discuss exactly what the purpose of a pressure cap is, let’s make sure we understand the basics of our cooling system.