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CST Radiator Caps

Regular Radiator Caps
CST regular radiator caps make an excellent replacement for worn or faulty radiator caps, which occur over time. CST's radiator caps are also easy to install and remove because the cap's shell turns interdependent of the sealing gasket, stem, and bottom plate.

Safety Radiator Caps
CST safety radiator caps utilize a lever that locks the cap to filler neck requiring the lever be lifted before removal. When the lever is lifted, the valve pressurizing in the cooling system is opened and pressure is vented through the overflow tube making it safe to remove the radiator cap.


  • CST radiator caps are manufactured and designed to meet or exceed original equipment specifications.


  • CST radiator caps are 100% pressure tested to assure reliability.


  • The materials used in construction of radiator caps are constantly monitored to assure conformance to specifications.