Gates 21587 Radiator Coolant Hose - Lower or Upper - Engine To Pipe

Gates 21587 Molded Coolant Hose Overview

Gates 21587 is a molded radiator coolant hose built to OEM-quality specifications for upper, lower, bypass, heater, and other coolant routing needs. Its EPDM construction and formed shape support a precise replacement for select Nissan, Cadillac, Chevrolet, and Oldsmobile applications.

The Gates Molded Coolant Hose line is engineered as a broad replacement solution for radiator hose service, helping reduce the time spent sourcing OE dealer parts for common cooling-system repairs.

Key Features

• EPDM rubber construction for coolant-system durability
• Molded hose profile for a formed, application-specific fit
• 1.25 in. (32 mm) end 1 inside diameter
• 1.5 in. (38 mm) end 2 inside diameter
• 13.7 in. (348 mm) centerline length
• No spring and no quick-connect fittings
• Direct replacement style for radiator coolant hose service

Detailed Description

This Gates 21587 radiator coolant hose is shaped for specific cooling-system routing and is listed for upper engine-to-pipe use on 1986-1989 Nissan D21 and 1987-1989 Nissan Pathfinder, plus lower hose applications on 1985-1986 Cadillac Cimarron, 1985-1986 Chevrolet Cavalier, and 1985-1986 Oldsmobile Firenza. If you are searching for a molded coolant hose for a Nissan D21 upper engine to pipe connection or a replacement radiator hose for a Chevrolet Cavalier lower position, this part number provides the required formed layout and hose sizing.

This part cross-references Dayco 71427 for the same application.

Common Repair Uses

• Coolant leaks from a cracked or aged radiator hose
• Softening, swelling, or collapse of an original EPDM hose
• Improper hose routing after cooling-system service
• Replacement of a worn upper engine-to-pipe hose on Nissan D21 or Pathfinder
• Replacement of a lower radiator hose on Cavalier, Firenza, or Cimarron

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length against the removed part before installation. Inspect adjoining pipes, clamps, and coolant connections for corrosion or wear, and confirm the hose is seated without twist or kinks. For fitment-specific searches, use Gates 21587 when looking for a molded coolant hose for 1986-1989 Nissan D21 upper engine to pipe service or 1987-1989 Nissan Pathfinder upper hose replacement.

Quality Assurance

Gates manufactures this molded coolant hose to OEM-quality specifications for cooling-system replacement work. The Gates Molded Coolant Hose line is positioned as a comprehensive aftermarket source for radiator and heater hose applications.