Expansion Tank Caps

Expansion Tank Caps, found within the Engine Parts > Cooling System category, are essential components of a vehicle's coolant recovery system. These caps seal the expansion tank, maintaining proper system pressure and preventing coolant loss through evaporation or overflow. Located on the coolant overflow reservoir, these caps feature pressure relief valves calibrated to specific pressures, ensuring the cooling system operates safely and efficiently. A faulty cap can lead to overheating, coolant leaks, and potential engine damage. Examples within our assortment include MAHLE caps like MPN CRB84000P and 70824594, as well as parts specific to commercial vehicles such as Mercedes-Benz Trucks and MAN (MPN 81473016067, 51055040122).