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Crown Automotive Radiator Caps have been manufactured from specifically selected materials. Radiator caps help reduce the danger of sudden breakage and any harm to other parts on the engine. Crown Automotive Radiator Caps are used to seal off the radiator and pressurize the coolant inside while raising its boiling point. This ensures that liquid and steam coming from the radiator does not spray out. The radiator cap acts as a filling location and a safety valve for the cooling system. These products are easy to install, remove and they maintain proper cooling system pressure. Replace your old radiator cap with a new one from the list of Crown Automotive cooling accessories here at 4wheelonline.com.