Gates 21576 Radiator Coolant Hose - Lower

Gates 21576 Molded Coolant Hose Overview

The Gates 21576 molded coolant hose is an OE-style radiator coolant hose built for lower cooling-system routing on select GM vehicles. Made from EPDM and formed to the correct molded shape, it supports a precise replacement for aging or damaged coolant lines on applications such as the Chevrolet Celebrity, Pontiac 6000, and Oldsmobile Cutlass Ciera.

Gates Molded Coolant Hose products are built around OEM-quality specifications for upper, lower, bypass, heater, and other coolant routing needs. The molded hose line is engineered to simplify radiator hose replacement by matching the original hose shape and dimensions more closely than universal hose stock.

Key Features

• Part number: 21576
• Brand line: Gates Molded Coolant Hose
• EPDM construction for coolant-system service
• Molded design for proper routing and fit
• 1.5 in. inside diameter at both ends
• 16.6 in. centerline length
• No spring and no quick-connect fittings
• Lower radiator coolant hose application

Detailed Product Description

This Gates radiator coolant hose is shaped for lower hose routing and measures 1.5 inches inside diameter at each end with a 16.6-inch centerline length. The molded EPDM construction helps it match the original hose path on the vehicle cooling system, which is important for maintaining proper clearance and alignment around the radiator, engine, and adjacent components. If you are replacing a worn lower coolant hose on a Chevrolet Celebrity, Pontiac 6000, or Oldsmobile Cutlass Ciera, Gates 21576 provides a direct-fit replacement option for the listed applications.

This part cross-references Dayco 71308 for the same application.

Vehicle Fitment

• Fits 1990-1991 Chevrolet Lumina APV, lower
• Fits 1990-1991 Oldsmobile Silhouette, lower
• Fits 1987-1991 Pontiac 6000, lower
• Fits 1990-1991 Pontiac Trans Sport, lower
• Fits 1987-1990 Chevrolet Celebrity, lower
• Fits 1987-1989 Buick Century, lower
• Fits 1987-1989 Oldsmobile Cutlass Ciera, lower
• Fits 1987-1989 Oldsmobile Cutlass Cruiser, lower
• Fits 1987 Oldsmobile Cutlass, lower

What This Hose Helps Address

• Coolant leaks from a cracked or deteriorated lower radiator hose
• Softening, swelling, or collapse in an aging EPDM hose
• Improper hose routing caused by a misshaped replacement hose
• Cooling-system service on vehicles with original molded hose layouts
• Replacement needs on GM cars and vans with the listed lower hose application

Installation Notes and Tips

Verify hose routing, end diameters, and centerline length against the removed part before installation. Inspect hose clamps, radiator necks, and engine fittings for corrosion or damage, and replace any worn sealing surfaces before filling the cooling system. Confirm the hose is seated fully and routed without twists or contact points that could create wear.

Quality Assurance

Gates manufactures molded coolant hoses to OEM-quality specifications for replacement use in radiator, heater, bypass, and other coolant applications. The Gates 21576 is built as a molded replacement hose for the listed fitments and dimensions.