Gates CO34739 Engine Coolant Thermostat / Water Outlet Assembly

Gates Coolant Outlet Assembly CO34739

The Gates Coolant Outlet CO34739 is an engine coolant thermostat and water outlet assembly built for direct replacement service on select Ford and Mercury applications. It is designed to match original fit and function while addressing common aftermarket material and design concerns with a practical, service-ready layout.

Compatible with 2002-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2002-2010 Mercury Mountaineer, and 2002-2003 Ford Explorer Sport, this coolant outlet assembly supports OE-style cooling system operation for the 190-degree thermostat application.

Key Features

• Gates Coolant Outlet line for thermostat housing and water outlet service
• Part number CO34739 for direct identification and ordering
• Plastic coolant outlet assembly for lightweight OE-style replacement
• Includes coolant outlet, seals, and thermostat
• Three-bolt mounting design for secure installation
• By-pass holes included for proper coolant flow routing
• Outlet dimensions: 1.48 in and .71 in outside diameter; 1.151 in and .532 in inside diameter
• OE temperature 190-degree thermostat application

Product Details

Gates Coolant Outlet assemblies are engineered as cost-effective replacements for common thermostat housing and water outlet failures. The CO34739 follows the original-style layout for the cooling system and is built to fit and perform like the factory part on Ford Explorer, Ford Explorer Sport Trac, Mercury Mountaineer, and Ford Explorer Sport models listed above. This part cross-references Dorman OE Solutions 902-860 for the same application.

The Gates Coolant Outlet product line focuses on full coverage for water outlets and complete thermostat housing assemblies, giving technicians a straightforward replacement option when the original housing is cracked, warped, or leaking. Gates CO34739 is a practical choice for restoring coolant routing and thermostat control in the engine cooling system.

What It Helps Fix

• Coolant leaks from a cracked or deteriorated outlet housing
• Overheating caused by thermostat housing failure
• Improper coolant flow through a damaged by-pass passage
• Warped or brittle plastic outlet components
• Cooling system service issues on Ford Explorer and Mercury Mountaineer applications

Installation Notes

Verify engine and cooling system configuration before installation, especially on 2002-2010 Ford Explorer, 2007-2010 Ford Explorer Sport Trac, 2002-2010 Mercury Mountaineer, and 2002-2003 Ford Explorer Sport applications. Inspect mating surfaces, coolant passages, and hose connections before assembly. The product notes indicate seal included; gasket quantity is listed as zero.

Quality Assurance

Gates designs this coolant outlet to address common aftermarket material and manufacturing issues while maintaining original-style fit and service life expectations. The CO34739 is built as a replacement coolant outlet assembly for dependable cooling system repair.