Radiator cap

The radiator cap is an important component of the engine cooling system, ensuring that the cooling circuit operates at the correct pressure. It seals the radiator or coolant expansion tank and simultaneously regulates the system pressure within the cooling system.

Modern radiator caps are equipped with an integrated pressure relief valve. This valve maintains a specific pressure in the cooling system, thereby raising the boiling point of the coolant. This allows the engine to be cooled more efficiently without the coolant evaporating prematurely at high temperatures.

Additionally, the radiator cap has a return valve that, when the engine cools down, returns excess coolant from the expansion tank back into the radiator. This keeps the cooling circuit stable and prevents air from entering the system.

Radiator caps typically consist of a robust metal or plastic housing with integrated spring mechanisms, seals, and pressure valves. These components are designed to withstand high temperatures, pressure loads, and the chemical effects of the coolant.

A faulty radiator cap can lead to coolant loss, pressure problems in the cooling system, or engine overheating. Timely replacement ensures that the cooling system functions correctly and the engine is reliably cooled.

In this category, you'll find radiator caps for numerous vehicle makes and models, available in perfect original equipment manufacturer (OEM) quality or as high-quality aftermarket alternatives. Autoteile Gossau offers the lowest prices in Switzerland, fast delivery, and the option of in-store pickup in Gossau. You can conveniently pay in cash or by card on-site.