Gates 51653 HVAC Heater Hose - Reservoir To Tee-1, Tee-1 To Auxiliary Water Pump or Tee-1 To Engine

Gates 51653 Molded Coolant Hose Overview

The Gates 51653 molded coolant hose is a molded HVAC heater hose built for specific vehicle routing and OE-style fitment. It uses EPDM and plastic construction and follows the factory-style branch layout for the cooling circuit on select 2014-2015 Chevrolet Malibu models.

As part of the Gates Molded Coolant Hose line, this hose is made for application-specific replacement where the original hose includes integrated branch routing. The Gates 51653 is shaped to match the factory path and supports the reservoir, tee, auxiliary water pump, and engine connections used on the listed Malibu applications.

Key Features

• Gates molded coolant hose for HVAC heater hose applications
• OE-style molded design for specific routing and fit
• EPDM and plastic construction
• Branch-style modular hose configuration
• End 1 inside diameter: 18 mm (.72 in)
• End 2 inside diameter: 18 mm (.72 in)
• End 3 inside diameter: 16 mm (.62 in)
• Centerline length: 673 mm (26.5 in)
• Molded construction with no spring and no quick-connect fittings

Detailed Description

The Gates Molded Coolant Hose product line focuses on application-specific coolant hose assemblies that follow original equipment routing and integrated component layouts. Part number 51653 is a molded branch hose built for select Chevrolet Malibu cooling system connections, including reservoir to tee-1, tee-1 to auxiliary water pump, and tee-1 to engine positions. If you are replacing a molded coolant hose on a 2014-2015 Chevrolet Malibu, this part number 51653 provides the correct branch-style configuration for those factory routes.

This part cross-references GM OE 23146898 and 23220061 for the same application.

What It Helps Address

• Coolant leaks from a cracked or aged molded hose
• Improper hose routing after a failed factory-style branch hose
• Loss of coolant flow through the reservoir, tee, or auxiliary water pump circuit
• Heat-related hose softening, swelling, or deterioration
• Replacement needs on 2014-2015 Chevrolet Malibu cooling system hose paths

Installation Notes and Tips

Verify the hose routing against the original part before installation, especially on branch-style assemblies. Confirm the end diameters and centerline length match the vehicle’s factory layout, and inspect adjoining tees, clamps, and connection points for wear or residue before installing the new hose. For 2014-2015 Chevrolet Malibu applications, confirm the reservoir to tee-1, tee-1 to auxiliary water pump, or tee-1 to engine routing before final assembly.

Quality Assurance

Gates is a recognized automotive aftermarket supplier in modular coolant hose assemblies, and this molded hose is manufactured to application-specific specifications with OE-style integrated routing in mind. Part number 51653 is built for direct replacement use on the listed Chevrolet Malibu fitments.