Calorstat RC0009 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Ford, Mazda, and Mercury

Calorstat RC0009 is a threaded engine coolant reservoir cap built with plastic and rubber for pressurized cooling systems. It is rated at 18.0 psi, or 1.2 bar, and is listed for Ford Escape, Mazda Tribute, and Mercury Mariner applications with the specified fitment below.

Key Features

• Engine coolant reservoir cap with threaded attachment type
• Pressurized design rated to 18.0 psi / 1.2 bar
• Plastic and rubber construction
• Standard cap type for cooling system reservoir service
• Fits 2001-2002 Ford Escape, N/A
• Fits 2003-2006 Ford Escape, N/A, OEM Recommended
• Fits 2007-2012 Ford Escape, N/A, Pressure Rating: 1,2bar - 18psi
• Fits 2001-2006 Mazda Tribute, N/A
• Fits 2008-2011 Mazda Tribute, N/A, Pressure Rating: 1,2bar - 18psi
• Fits 2005-2011 Mercury Mariner, N/A, Pressure Rating: 1,2bar - 18psi

Detailed Description

Calorstat RC0009 is a pressurized coolant reservoir cap for vehicles that use a threaded expansion tank or reservoir closure. The 18.0 psi pressure rating helps maintain the cooling system’s operating pressure, while the plastic and rubber construction provides the sealing interface needed for reservoir service. This part cross-references Febi-Bilstein 31539 and Anchor 10251 for the same application. It is a direct fit for Ford Escape, Mazda Tribute, and Mercury Mariner cooling system applications listed in the fitment data, including Ford Escape and Mazda Tribute models with OEM recommended coverage.

Common Cooling System Issues

• Loss of reservoir pressure from a worn or damaged cap
• Coolant seepage around the expansion tank neck
• Pressure-related cooling system warning symptoms
• Cap seal deterioration from heat and age
• Incorrect reservoir cap pressure rating on Ford Escape, Mazda Tribute, or Mercury Mariner

Installation Notes and Tips

Verify the reservoir neck style and pressure specification before installation. Thread the cap on evenly until fully seated, and inspect the sealing surfaces for cracks, debris, or hardened rubber before reuse. For Ford Escape, Mazda Tribute, and Mercury Mariner service, confirm the replacement matches the original pressure rating and threaded design.

Quality Assurance

Calorstat RC0009 is built as a standard pressurized coolant reservoir cap using plastic and rubber materials and is specified for the listed OE-style applications. Fitment data includes Ford Escape, Mazda Tribute, and Mercury Mariner coverage across the model years shown.