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Radiator Caps

Radiator Caps

The radiator cap is a pressure release valve that helps prevent leaks and overheating in your car's cooling system. Car Parts 4 Less stocks cheap radiator caps for every make and model.

When coolant fluid heats up it expands. As the fluid in a radiator is in an enclosed space, the pressure increases as the fluid gets hotter. The radiator cap is a valve that opens at a pre-set pressure point. This is usually 15 or 16 pounds per square inch. When the cap opens, it allows excess heat and fluid to escape into tanks on either side. When the radiator cools down, the cap sucks the fluid back into the chamber. A faulty radiator cap may cause your engine to overheat much sooner than usual. It can also lead to the tank overflowing, which in turn can cause leaks. A bad cap can also let air into the system, which can make your radiator less able to produce heat. To prolong the life of your engine, get the best prices on a new radiator cap from Car Parts 4 Less.