Gates CO34738 Engine Coolant Water Outlet - Lower Housing

Gates Coolant Outlet CO34738 for Ford and Mazda

The Gates Coolant Outlet CO34738 is an engine coolant water outlet built for select Ford, Mazda, and Mercury applications with lower housing fitment. It is made from plastic and includes seals for a direct replacement approach that matches the original outlet layout and cooling-system connection points.

Gates Coolant Outlets are engineered as a practical replacement for common aftermarket cooling parts, with attention to fit, material selection, and long service life. The CO34738 coolant outlet is a strong match for drivers searching for a Ford Ranger coolant outlet, Ford Explorer lower housing coolant outlet, or Mazda B4000 engine coolant water outlet.

Key Features

• Brand: Gates Coolant Outlet
• Part number: CO34738
• Engine coolant water outlet / coolant outlet design
• Plastic construction
• Lower housing application
• 3 bolt holes
• Outlet inside diameter: .532 in
• Outlet outside diameter: .71 in
• By-pass holes included
• By-pass inside diameter: .887 in
• By-pass outside diameter: 1.069 in
• Contents: coolant outlet and seals

Product Details

The Gates CO34738 is designed to replace the coolant outlet used at the lower housing on select Ford, Mazda, and Mercury vehicles. It follows the original-style layout for the coolant hose flange and uses the specified outlet and by-pass dimensions to support proper coolant routing. This part cross-references Motorad CH5139 for the same application.

Compatible With 2002-2011 Ford Ranger, lower housing; 2002-2010 Ford Explorer, lower housing; 2007-2010 Ford Explorer Sport Trac, lower housing; 2001-2005 Ford Explorer Sport Trac, lower housing; 2005-2010 Ford Mustang, lower housing; 2001-2010 Mazda B4000, lower housing; 2002-2010 Mercury Mountaineer, lower housing; 2002-2003 Ford Explorer Sport, lower housing; and 2001 Ford Explorer, Explorer Sport, and Ranger, lower housing with clip-in sensor.

Common Cooling System Issues This Part Can Address

• Cracked or warped coolant outlet housing
• Coolant seepage at the lower housing connection
• Damaged hose flange sealing surface
• By-pass passage wear or mismatch
• Failed original plastic outlet on Ford Ranger, Explorer, Mustang, or Mazda B4000 applications

Installation Notes and Tips

Verify the lower housing configuration, outlet dimensions, and sensor style before installation. The 2001 Ford Explorer, Explorer Sport, and Ranger listings use a clip-in sensor note, while other applications reference the engine coolant hose flange with seal included. Confirm the vehicle’s cooling-system layout against the part number CO34738 before service.

Quality Assurance

Gates positions this coolant outlet line as a cost-effective replacement for common design, manufacturing, and material issues found in other aftermarket options. The CO34738 is built to fit and perform like the original coolant outlet while supporting long service life in the cooling system.