The Gates 31527 Radiator Cap ensures you are Ready for the Road Ahead being built to last with its corrosion-resistant, heavy gauge metal. Experience long service life and accurate pressure control, while covering a wide range of pressures. With precise pressure control, no adjustment is required for installation. This Gates radiator cap is designed to raise the radiator fluid’s boiling point in order to prevent premature boiling and overheating in your cooling systems, maintaining your active road time. FleetPride is your First Click in Heavy Duty .