In a cooling system, a higher pressure equates to a higher boiling point for the coolant. Higher coolant pressures also transfer heat from the cylinder heads more efficiently. Most OEM caps are set to release pressure at about 15 PSI. By installing an aftermarket radiator cap you can further increase the boiling point of your engines coolant. Most aftermarket caps are rated at about 19 PSI, but this is not the only available pressure. This will allow you to run in higher ambient temperatures without the worry of your cooling system boiling over.
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