Calorstat RC0008 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Saab and Saturn

The Calorstat RC0008 is a threaded, pressurized engine coolant reservoir cap built with plastic and rubber construction. It is specified for an 18 PSI opening pressure and is used on select Saab 9-3, Saab 9-3X, and Saturn Astra applications.

• Brand: Calorstat
• Part number: RC0008
• Engine coolant reservoir cap with threaded attachment
• Pressurized design with 18 PSI opening pressure
• Plastic and rubber construction
• Maximum pressure rating: 18.0
• Standard type with no pressure release lever

Fitment Details

• Fits 2003-2011 Saab 9-3, N/A; pressure rating: 1.2 bar - 18 psi
• Fits 2010-2011 Saab 9-3X, N/A; pressure rating: 1.2 bar - 18 psi
• Fits 2008-2009 Saturn Astra, N/A; pressure rating: 1.2 bar - 18 psi

Product Description

RC0008 is an engine coolant reservoir cap designed to maintain the specified pressure in the cooling system and seal the expansion tank with a threaded fit. For Saab 9-3 and Saab 9-3X models, as well as Saturn Astra applications, the 18 PSI rating helps preserve the correct system pressure for normal coolant operation. If you are replacing a worn or damaged coolant reservoir cap on a Saab 9-3, Saab 9-3X, or Saturn Astra, RC0008 provides the correct pressure specification for those listed vehicles.

This part cross-references Dayco 28490 and URO 9202799 for the same application.

Common Uses

• Replacing a cracked or worn coolant reservoir cap
• Restoring proper cooling system pressure
• Addressing coolant loss from a cap that no longer seals
• Correcting pressure-related cooling system warnings
• Supporting stable coolant expansion and recovery operation

Installation Notes

Verify the reservoir neck style, threaded attachment, and pressure rating before installation. Match the cap to the vehicle’s specified 18 PSI requirement and inspect the reservoir sealing surface for damage, debris, or distortion. Confirm fitment by year, make, and model before use.

Quality Assurance

Calorstat coolant system components are built to meet the pressure and sealing requirements called out for the listed applications. RC0008 is specified as a pressurized replacement cap for the vehicles shown above.