Genuine Porsche Coolant Expansion Tank Cap

The Genuine Porsche Coolant Expansion Tank Cap is an original equipment replacement radiator cap for the coolant expansion tank (coolant reservoir) in the engine cooling system. It seals the tank and helps keep the system at its designed operating pressure.

Key Features:

• Genuine Porsche original equipment part, made to the factory specifications for fit and function
• Seals the coolant expansion tank to help prevent leaks and coolant loss
• Includes a pressure relief function that helps the cooling system hold its rated pressure
• Helps protect the engine from overheating caused by a worn or faulty cap
• Easy to install and replace by hand on the expansion tank filler neck

A worn or damaged expansion tank cap can cause coolant loss, pressure problems and overheating. Replacing it with a genuine Porsche cap helps restore proper cooling system performance and reliability. Select the correct variant for your application from the options on this page.