The Tridon Radiator Cap, designated as CA1390, shares the same fundamental functions and principles as the previously mentioned radiator caps. 

Features:

• Sealing: The primary purpose of a radiator cap, including the CA1390, is to seal the top of the radiator or expansion tank in the vehicle's cooling system. This seal is essential to prevent coolant loss due to evaporation or leaks.
• Pressurization: The radiator cap pressurizes the cooling system. This pressurization helps maintain the proper pressure within the cooling system, which, in turn, raises the boiling point of the coolant. Elevating the boiling point is crucial to prevent the coolant from boiling over and to ensure efficient heat dissipation.
• Material: Radiator caps can be made from either metal or plastic, depending on the specific design and requirements of the vehicle manufacturer.
• Faulty Cap: A faulty radiator cap, such as the CA1390, can result in coolant loss, leading to reduced coolant levels and potential engine overheating. It can also disrupt the cooling system's ability to maintain the correct pressure, which can adversely affect engine performance.
• Compatibility: It is essential to verify that the radiator cap you select is compatible with your vehicle's cooling system. Different vehicles may have specific requirements for radiator caps, so always refer to the manufacturer's vehicle application list or seek guidance from a qualified mechanic to choose the correct part number.

The Tridon Radiator Cap (CA1390) serves critical functions in a vehicle's cooling system by sealing the radiator or expansion tank, pressurizing the cooling system, and raising the boiling point of the coolant. To prevent coolant loss and maintain safe engine temperatures, always ensure compatibility with your vehicle's cooling system when selecting a radiator cap.