Calorstat RC0150 Engine Coolant Reservoir Cap - Radiator

Engine Coolant Reservoir Cap for Ford, Volvo, and More

Calorstat RC0150 is a threaded engine coolant reservoir cap built from plastic and rubber for pressurized cooling systems. It is rated at 21.0 psi and is specified for applications with a 1.49 in filler neck inside diameter, including many Ford, Lincoln, Volvo, Land Rover, and Mazda models.

Key Features

• Engine coolant reservoir cap with threaded attachment
• Pressurized design rated to 21.0 psi
• Plastic and rubber construction for cooling system sealing
• Standard type for reservoir and radiator-style applications
• Direct-fit coverage for many Ford F-150, Mustang, Explorer, Escape, and Transit models
• Part number RC0150 for catalog and cross-reference lookup

Detailed Description

This Calorstat RC0150 coolant reservoir cap is used to seal the cooling system and maintain the specified pressure level in vehicles that call for a 21 psi cap. Proper pressure control helps the cooling system operate as engineered, and the threaded design provides a secure fit on the correct filler neck. Compatible vehicle coverage includes Ford F-150, Ford Explorer, Ford Mustang, Lincoln Aviator, Volvo XC60, and other listed applications. This part cross-references Gates 31549 and Genuine LR000243 for the same application.

What It Helps Solve

• Coolant loss from a worn or damaged reservoir cap seal
• Pressure retention issues in the cooling system
• Improper cap fit on the specified 1.49 in filler neck
• Cooling system warning conditions related to cap sealing
• Service replacement for aging Ford, Volvo, and Land Rover cooling system caps

Installation Notes and Tips

• Verify the filler neck inside diameter is 1.49 in before installation.
• Confirm the vehicle calls for a 21 psi / 1.45 bar pressurized cap.
• Inspect the reservoir neck and sealing surface for cracks, debris, or distortion.
• Thread the cap on fully and check for a secure seal after installation.
• Use the fitment notes for model-specific timing and OEM-recommended applications.

Quality Assurance

Calorstat RC0150 is built as a standard pressurized coolant reservoir cap using plastic and rubber materials for cooling system service. Confirmed fitment includes 2004-2025 Ford, Lincoln, Volvo, Land Rover, and Mazda applications listed in the catalog data, including 2015-2025 Ford F-150, 2020-2023 Ford Explorer, 2019-2023 Lincoln Navigator, and 2019-2023 Volvo XC90.