Roadmax C1204 Radiator Coolant Hose - Upper

Roadmax C1204 Molded Coolant Hose

Roadmax C1204 is a molded radiator coolant hose for upper cooling-system routing on a wide range of classic Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. It uses EPDM and plastic construction and is listed as a cut-to-fit molded hose for vehicles that need a direct replacement with the correct 1.25 in. inside diameter at both ends.

Key Features

• Brand Line: Roadmax Molded Coolant Hose
• Part Number: C1204
• EPDM and plastic construction for radiator coolant service
• 1.25 in. inside diameter at End 1 and End 2
• 30.8 in. centerline length
• No spring included
• Upper hose position
• Cut-to-fit molded hose design

Product Details

The Roadmax Molded Coolant Hose line focuses on practical replacement value for drivers who want dependable cooling-system service without stepping up to a premium hose. C1204 is built for upper radiator hose routing and is listed across many 1979-1991 applications, including Chevrolet Camaro, Chevrolet Caprice, GMC Jimmy, and Pontiac Grand Prix. This part cross-references Gates 21204 and Dayco 71028 for the same application.

Use C1204 when you need a molded upper radiator coolant hose with the correct diameter and length for classic GM cooling layouts. The molded shape helps match factory-style routing, while the cut-to-fit format gives flexibility during installation on listed vehicles.

What It Helps Fix

• Cracked or hardened upper radiator hose material
• Coolant leaks at the hose body or connection points
• Incorrect hose length or routing on listed GM applications
• Softening, swelling, or collapse in an aging coolant hose
• Cooling-system service on vehicles such as Chevrolet Monte Carlo, GMC C1500, and Pontiac Firebird

Installation Notes

Verify hose routing, end diameters, and centerline length before trimming or installing. This hose is listed for upper position use and does not include a spring. Confirm the vehicle’s exact engine and cooling layout against the fitment notes, especially on applications marked cut to fit, W/A.C., or engine-specific.

• Fits 1980-1990 Chevrolet Caprice, upper
• Fits 1980-1988 Chevrolet Monte Carlo, upper
• Fits 1980-1987 GMC Jimmy, upper
• Fits 1980-1987 Pontiac Grand Prix, upper
• Fits 1987-1991 Chevrolet R3500, upper
• Fits 1987-1991 Chevrolet V3500, upper

Quality Assurance

Roadmax positions the Molded Coolant Hose line as a value-focused replacement option for customers who want quality construction for everyday cooling-system service. C1204 is built with EPDM and plastic materials for radiator hose use and is cataloged for direct application matching across the listed vehicles.