Radiator Caps

Radiator caps are crucial for maintaining the correct pressure within a vehicle’s cooling system, directly impacting the efficiency and safety of engine temperature regulation. A properly functioning radiator cap ensures that coolant remains under pressure, raising its boiling point and allowing the system to manage higher engine temperatures without boiling over. This helps prevent overheating, supports optimal operation of the radiator fan, and minimizes the risk of coolant loss.

Over time, wear or damage may lead to a faulty seal, making radiator cap replacement essential to prevent pressure loss and potential radiator leaks. In performance or high-demand applications, such as with a Mishimoto radiator, selecting a cap with the correct pressure rating is critical to ensure compatibility and maintain system integrity. A compromised radiator cap can result in fluctuating coolant levels, inefficient heat dissipation, and ultimately engine stress, making its role in the cooling system fundamental for both stock and aftermarket setups.