Gates 51987 HVAC Heater Hose - Battery Cooler Inlet

Gates 51987 Molded Heater Hose

Gates 51987 is a molded HVAC heater hose built for specific vehicle applications and shaped to match OE-style routing. It uses EPDM and plastic construction with 19 mm (0.75 in.) inside diameters at both ends and a 42.22 in. centerline length for a precise fit in the cooling circuit.

Fits 2017-2019 Chevrolet Bolt EV, Battery Cooler Inlet. This molded coolant hose is part of the Gates Molded Coolant Hose line, which focuses on application-specific hose assemblies that follow original equipment layouts and integrate the required connection points for the vehicle.

Key Features

• Part number: 51987
• Brand: Gates Molded Coolant Hose
• HVAC heater hose / molded coolant hose application
• EPDM and plastic construction
• 19 mm (0.75 in.) inside diameter at both ends
• 42.22 in. centerline length
• Direct fit for the battery cooler inlet on select Chevrolet Bolt EV models

Detailed Description

Gates 51987 is engineered for the 2017-2019 Chevrolet Bolt EV battery cooler inlet and follows the molded hose shape needed for proper coolant routing. The hose is built to OE-style dimensions and uses durable EPDM with plastic sections to match the vehicle’s cooling system layout. If you are replacing a worn or damaged hose on a Chevrolet Bolt EV, part number 51987 provides the correct molded configuration for this application.

This part cross-references Monroe Shocks & Struts (e.g., 42518091) for the same application.

What This Hose Helps Address

• Coolant leaks at a cracked or deteriorated hose
• Improper routing caused by a misshaped or collapsed hose
• Loss of cooling performance at the battery cooler inlet
• Fitment issues from using a universal hose in a molded application
• Service replacement for a damaged OEM-style coolant hose

Installation Notes and Tips

Verify the vehicle year, make, model, and battery cooler inlet position before installation. Compare the original hose routing, end diameters, and centerline length to Gates 51987 to confirm the correct replacement. Inspect adjoining clamps, connectors, and mating surfaces for wear or contamination before installing the new hose.

Quality Assurance

Gates is a recognized aftermarket supplier of modular coolant hose assemblies and application-specific molded hoses built to OE-style specifications for proper fit and routing.