Calorstat RC0049 Radiator Cap

Radiator Cap for OE-Style Cooling System Control

The Calorstat RC0049 radiator cap is a round, cam-on cap built with stainless steel and rubber for OE performance applications. It is rated at 20 psi and fits a 1.49-inch filler neck inside diameter, making it a direct-match cooling system service part for select Mercedes-Benz, BMW, and Dodge vehicles.

Use the Calorstat RC0049 when you need a replacement radiator cap for vehicles such as the Mercedes-Benz 300E, 500SL, and Sprinter, or the BMW M3 and M5 applications listed below. The RC0049 part number is also referenced in cross-application catalogs for the same fitment.

Key Features

• Brand: Calorstat
• Part number: RC0049
• Radiator cap with cam-on attachment type
• Stainless steel and rubber construction
• Silver finish with round shape
• Standard type with OEM Performance grade
• 20 psi maximum pressure rating
• Fits filler neck inside diameter: 1.49 in.
• Height: 1.1 in.

Detailed Description

The Calorstat RC0049 is an OEM-performance radiator cap engineered for cooling systems that require a 1.49-inch filler neck and a 20 psi pressure rating. Its stainless steel and rubber construction supports secure sealing and consistent pressure control, while the cam-on design provides the correct attachment style for the listed applications. This part number, RC0049, is used across multiple catalog references for select Mercedes-Benz, BMW, and Dodge cooling system service needs.

This part cross-references Quality-Built 10371 and Dixie Electric Ltd 10391 for the same application.

Vehicle Fitment

• Fits 2014 Mercedes-Benz CL65 AMG, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 2001-2008 Dodge Durango, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 2001-2007 Dodge Dakota, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 2003-2006 Dodge Sprinter 2500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 2003-2006 Dodge Sprinter 3500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 2004-2006 Mercedes-Benz Sprinter, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1996-1997 Mercedes-Benz CL500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1996-1997 Mercedes-Benz CL600, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1997 Mercedes-Benz SLK230, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1995 Mercedes-Benz S600L, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz C220, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz C280, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz E320, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz E420, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz E500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz S320, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz S350, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz S420, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz S500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz S600, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz SL320, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz SL500, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1994 Mercedes-Benz SL600, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1993 Mercedes-Benz 190E, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1988-1993 Mercedes-Benz 300CE, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1990-1993 Mercedes-Benz 300D, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1987 Mercedes-Benz 300D, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1985 Mercedes-Benz 300D, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1993 Mercedes-Benz 300E, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992-1993 Mercedes-Benz 300SD, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1985 Mercedes-Benz 300SD, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1990-1993 Mercedes-Benz 300SL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1988-1993 Mercedes-Benz 300TE, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992-1993 Mercedes-Benz 400E, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1993 Mercedes-Benz 400SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992-1993 Mercedes-Benz 500E, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1993 Mercedes-Benz 500SEC, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1984-1985 Mercedes-Benz 500SEC, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992-1993 Mercedes-Benz 500SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1984-1985 Mercedes-Benz 500SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1990-1993 Mercedes-Benz 500SL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1993 Mercedes-Benz 600SEC, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992-1993 Mercedes-Benz 600SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1993 Mercedes-Benz 600SL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1992 Mercedes-Benz 400SE, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1988-1991 BMW M3, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1988-1991 Mercedes-Benz 300SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1991 Mercedes-Benz 350SD, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1990-1991 Mercedes-Benz 350SDL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1991 Mercedes-Benz 420SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1991 Mercedes-Benz 560SEC, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1991 Mercedes-Benz 560SEL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1987-1989 Mercedes-Benz 260E, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1989 Mercedes-Benz 560SL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1988 BMW M5, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1987-1988 BMW M6, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1986-1987 Mercedes-Benz 300SDL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1987 Mercedes-Benz 300TD, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1985-1986 BMW 524td, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1984-1985 Mercedes-Benz 380SE, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1981-1985 Mercedes-Benz 380SL, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1983 Mercedes-Benz 380SEC, N/A. Pressure Rating: 1,4bar - 20psi
• Fits 1981-1983 Mercedes-Benz 380SEL, N/A. Pressure Rating: 1,4bar - 20psi

Common Issues This Part Addresses

• Cooling system pressure loss from a worn or weak radiator cap
• Coolant overflow caused by improper cap sealing
• Incorrect pressure retention in the radiator neck
• Service replacement for a damaged or corroded cap
• Fitment correction for vehicles requiring a 20 psi cam-on cap

Installation Notes and Tips

Confirm the filler neck inside diameter is 1.49 inches before installation. Match the cam-on attachment style and the 20 psi pressure rating to the vehicle’s cooling system specification. Inspect the radiator neck, rubber seal surface, and cap locking points for wear or corrosion before installing the RC0049.

Quality Assurance

Calorstat RC0049 is built to OEM Performance standards for the listed applications, with stainless steel and rubber materials selected for sealing and pressure control in radiator service.