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Race Car Radiator Caps

Why choosing the correct Radiator Cap is important?

Everyone knows the function of the radiator in their car, what is lesser known is why selecting the correct Radiator Cap is so important. The answer is simple, inside your radiator loop you have coolant, which when it overheats, this liquid expands, which inside your radiator loop builds pressure. Imagine the pressure has no way of escaping. BANG! Step in your Radiator Cap, which acts as a pressure release valve and will open once the pressure in your system has reached a certain point. That is why you need to choose a Radiator Cap that is set to open at the correct pressure for your system.

McGill Motorsport presents below various Radiator Caps with differing maximum pressure including 1.1bar and 1.3bar.

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