What type of radiator pressure cap is found on todays vehicles?

Most modern vehicles use a pressure radiator cap that typically features a spring-loaded design, allowing it to maintain a specific pressure level within the cooling system, usually around 15 to 20 psi. This cap helps prevent coolant from boiling and allows for the efficient operation of the vehicle's cooling system by maintaining optimal pressure. Additionally, many caps include a venting mechanism that allows excess pressure to escape, preventing potential damage to the radiator and engine.