Gates CO34737 Engine Coolant Water Outlet - Upper

Engine Coolant Outlet for Ford and Mercury

The Gates Coolant Outlet CO34737 is an engine coolant water outlet designed for direct replacement on select Ford and Mercury applications. It is built to match original fit and function while addressing common material and design issues found in many aftermarket alternatives.

Compatible with 2002-2010 Ford Explorer, upper; 2007-2010 Ford Explorer Sport Trac, upper; 2002-2010 Mercury Mountaineer, upper; and 2002-2003 Ford Explorer Sport, upper. This Gates CO34737 coolant outlet includes a seal and is shaped for the upper coolant hose flange location.

Key Features

• Brand: Gates Coolant Outlet
• Part number: CO34737
• Engine coolant water outlet / coolant outlet design
• Plastic construction
• Outlet inside diameter: 1.151 in.
• Outlet outside diameter: 1.49 in.
• 3 bolt holes
• Includes seal
• OE-style fit and performance for select applications

Product Details

Gates Coolant Outlets are engineered as direct-fit replacements for cooling system service. The Coolant Outlet line is built to provide a practical replacement for worn or damaged coolant outlet assemblies, with coverage that ranges from individual water outlets to complete thermostat housing assemblies. For buyers searching for a Ford Explorer coolant outlet or Mercury Mountaineer upper coolant hose flange, CO34737 offers a fit-focused solution backed by Gates cooling system expertise.

This part cross-references Dorman OE Solutions 902-896 and Four Seasons 85285 for the same application.

Common Problems This Part Can Address

• Coolant leaks at the upper hose flange or outlet housing
• Cracked or warped plastic coolant outlet components
• Damaged sealing surfaces at the thermostat housing connection
• Cooling system service needs on a Ford Explorer, Explorer Sport Trac, or Mercury Mountaineer
• Replacement of a worn engine coolant water outlet on select upper-position applications

Installation Notes

Verify engine and fitment details before installation, especially the upper position and hose flange configuration. Inspect the mating surfaces, hose condition, and seal area during service to help ensure a proper coolant system repair. The part number CO34737 is listed for specific Ford Explorer, Explorer Sport Trac, Explorer Sport, and Mercury Mountaineer applications only.

Quality Assurance

Gates designs this coolant outlet to fit and perform like the original part while improving on common aftermarket material and manufacturing concerns. The CO34737 is part of Gates' Coolant Outlet program, which is focused on long service life and OE-style replacement coverage.