Calorstat RC0160 Engine Coolant Reservoir Cap - Radiator

Engine Coolant Reservoir Cap for Mercedes-Benz

Restore proper cooling system sealing with the Calorstat RC0160 engine coolant reservoir cap. This pressurized, threaded cap is built from plastic and rubber and is rated to 20.0 psi, matching applications that require a 1.4 bar cooling system cap. It is a direct-fit solution for a wide range of Mercedes-Benz models, including C300, E350, GLC300, GLE350, and S-Class applications.

Key Features

• Engine coolant reservoir cap for pressurized cooling systems
• Threaded attachment type for secure installation
• Plastic and rubber construction
• Maximum pressure rating: 20.0 psi
• Standard design with no pressure release lever
• Compatible with many Mercedes-Benz, INFINITI, and Chrysler applications
• Part number RC0160 for catalog and cross-reference lookup

Detailed Description

The Calorstat RC0160 is an OE-style coolant reservoir cap designed to maintain the correct pressure in the expansion tank or radiator, depending on application. Proper cap pressure is critical for stable coolant circulation, consistent boiling point control, and reliable sealing of the cooling system. This part number RC0160 cross-references Gates 31540 for the same application.

Compatible With Mercedes-Benz C300, E350, GLC300, GLE350, GLS450, S500, SL55 AMG, and many other fitments listed for 1995-2025 model years. It also covers select INFINITI Q50 and Q60 applications, plus Chrysler Crossfire coverage where specified. For buyers searching for a Mercedes-Benz coolant reservoir cap, radiator cap, or pressurized expansion tank cap, RC0160 is a direct catalog match for numerous OE-referenced applications.

Common Problems This Part Addresses

• Coolant loss from a cap that no longer seals correctly
• Pressure-related overflow or venting from the reservoir
• Low cooling system pressure caused by a worn cap seal
• Incorrect boiling point control in the cooling system
• Warning lights or overheating concerns tied to cap failure

Installation Notes and Tips

• Confirm the pressure rating on the original cap before installation.
• Inspect the reservoir neck or radiator filler neck for cracks, debris, or damaged threads.
• Install by threading the cap fully until it seats securely.
• Use the fitment notes for VIN-specific and OEM-recommended applications, especially on Mercedes-Benz models with expansion tanks or radiator-mounted caps.

Quality Assurance

Calorstat supplies this RC0160 coolant reservoir cap as a pressurized replacement built to match the specified application requirements, including the 20.0 psi rating used across many Mercedes-Benz cooling systems.