The Water Transfer Connection (WTC) is a crucial component in cooling system. It is responsible for transferring coolant from the engine block to the radiator, where it can be cooled before being circulated back into the engine. The WTC typically consists of a metal hose that connects to both the engine and radiator, with specialized fittings at each end to ensure a secure and leak-free connection. Without a properly functioning WTC, the engine can quickly overheat, leading to serious damage and potentially costly repairs.