Calorstat RC0159 Engine Coolant Reservoir Cap - Radiator

Engine Coolant Reservoir Cap for Ford and Lincoln

The Calorstat RC0159 is a threaded engine coolant reservoir cap built with plastic and rubber for pressurized cooling systems. It is specified at 16.0 psi and is used on a wide range of Ford, Lincoln, Mercury, Land Rover, Jeep, Saturn, Chevrolet, Pontiac, Buick, Cadillac, and Oldsmobile applications.

Key Features

• Engine coolant reservoir cap with threaded attachment
• Pressurized design rated to 16.0 psi
• Plastic and rubber construction
• Standard cap type for cooling system service
• No pressure release lever
• Compatible with many Ford E-350 Super Duty, Explorer, F-150, and Mustang applications

Detailed Description

Calorstat RC0159 is a standard pressurized coolant reservoir cap designed for vehicles that require a 16 psi cooling system seal. The threaded design helps maintain system pressure in the reservoir, supporting proper coolant circulation and stable operating temperature. This part number is listed across many fitments, including Ford E-350 Super Duty, Ford Explorer, Ford F-150, and Lincoln Navigator applications, along with additional coverage for Mercury, Land Rover, Jeep, and other makes.

This part cross-references Gates (e.g., 31405, 31406) for the same application.

Common Problems This Cap Can Address

• Coolant loss from a weak or damaged reservoir cap seal
• Pressure loss in the cooling system
• Overflow or venting caused by a worn cap
• Improper sealing on threaded coolant reservoirs
• Cooling system service on vehicles calling for a 16 psi cap

Installation Notes and Tips

• Verify the reservoir neck uses a threaded cap design before installation.
• Match the pressure rating to the vehicle specification; this cap is rated at 16.0 psi.
• Inspect the reservoir sealing surface and threads for damage before fitting the new cap.
• Confirm vehicle-specific fitment notes, including date breaks such as 2009 Ford Mustang from 08/18/2008 and 2019 Ford Explorer to 03/03/2019.
• Use the listed application data for exact compatibility on Ford, Lincoln, Mercury, and related models.

Quality Assurance

Calorstat RC0159 is a pressurized cooling system cap built from plastic and rubber to meet the specified 16.0 psi rating. The part is listed with OE-style application coverage across numerous Ford and Lincoln models, including E-350 Super Duty, Explorer, and Navigator, as well as additional vehicle platforms.