Gates 21585 Radiator Coolant Hose - Lower or Upper

Gates 21585 Molded Coolant Hose

Gates 21585 is a molded radiator coolant hose built to OEM-quality specifications for upper and lower cooling-system applications. Made from EPDM, it is shaped for a precise coolant routing path on select BMW, Buick, Oldsmobile, and Pontiac vehicles.

The Gates Molded Coolant Hose line is engineered as a broad replacement range for radiator, bypass, and heater hose service. For buyers searching for a molded coolant hose for BMW 750iL upper hose service or a lower radiator hose for Buick LeSabre and Pontiac Bonneville applications, part number 21585 provides a direct replacement option.

Key Features

• EPDM construction for coolant-system durability
• Molded design for a formed OE-style hose route
• 1.5 in. / 38 mm inside diameter at both ends
• 20.9 in. / 531 mm centerline length
• No spring and no quick-connect fittings
• Compatible with upper and lower coolant hose positions listed in fitment

Product Details

This Gates molded coolant hose is part of the Gates Molded Coolant Hose line, a replacement hose family developed for multiple coolant applications with OEM-style dimensions and fit. Part number 21585 is used on select BMW 850Ci and 750iL upper hose applications, as well as lower hose applications on Buick LeSabre, Buick Park Avenue, Oldsmobile 88, Oldsmobile 98, Oldsmobile Delta 88, and Pontiac Bonneville. If you need a molded radiator coolant hose 21585 for a specific vehicle, verify the year, make, model, and position before ordering.

This part cross-references Dayco 71500 for the same application.

What It Helps Fix

• Coolant leaks from a cracked or softened hose
• Restricted coolant flow caused by hose collapse or deformation
• Overheating related to a damaged radiator hose
• Improper hose routing from a worn or incorrect replacement hose
• Service delays when replacing an OE-style molded coolant hose

Installation Notes

Confirm the hose position, end diameters, and centerline length against the original part before installation. This molded hose is not a universal hose; it is built for the specific upper or lower applications listed in the fitment data. Inspect clamps, necks, and adjoining cooling-system components for wear before installing the new hose.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for replacement use in the cooling system. The EPDM construction and formed shape support accurate fitment on the listed BMW, Buick, Oldsmobile, and Pontiac applications, including 1995-1998 BMW 750iL, 1995-1997 BMW 850Ci, and 1987-1995 Pontiac Bonneville lower hose service.