This radiator cap is a crucial component for an enhanced cooling system. It's a genuine Subaru OEM part. It fits 2004 - 2021 Subaru STI and 2002 - 2024 Subaru WRX models. Radium caps are designed to boost cooling efficiency safely by controlling the boiling temperature. A higher radiator pressure effectively increases the coolant boiling point, giving you an extra safety buffer and preventing air pocket cavitation at the water pump. This radiator cap has a pressure rating of 15.7lb.
Using this radiator cap is easy. Just replace your old cap with this new genuine Subaru OEM radiator cap. Make sure it's tightly sealed to prevent any coolant leaks. When it comes to maintenance, regularly check the cap for any signs of wear or damage. If you notice cracks or if the pressure rating seems off, it's time to replace it. Also, always use the correct coolant as recommended by Subaru to keep your cooling system in top - shape. Avoid over - tightening the cap as it might damage the radiator or the cap itself.
