Four Seasons 86007 Engine Coolant Water Outlet

Engine Coolant Water Outlet for GM HD Trucks

The Four Seasons Water Outlet, part number 86007, is an aluminum engine coolant outlet for select Chevrolet Silverado HD and GMC Sierra HD applications. It is built to meet or exceed OEM requirements and is supplied without a thermostat or gasket/seal.

Key Features

• Aluminum construction for coolant system durability
• Engine coolant water outlet, style without thermostat
• Inlet diameter: 2.000 in.
• Maximum height: 2.500 in.
• Bolt hole center to bolt hole center: 1.87 in.
• Mounting flange width: 0.780 in.
• Meets or exceeds OEM specifications
• Gasket or seal not included
• Thermostat not included

Product Details

Four Seasons 86007 is a direct-fit engine coolant water outlet for cooling system service on heavy-duty GM trucks. This Water Outlet line focuses on replacement coolant components built to match OE-style dimensions and function, making it a practical choice when servicing the thermostat housing area on Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500 HD, GMC Sierra 2500 HD, and GMC Sierra 3500 HD models. This part cross-references Motorad CH6007 for the same application.

What It Helps Address

• Coolant leaks at the outlet housing
• Cracked or corroded aluminum coolant outlet components
• Improper sealing at the thermostat housing area
• Cooling system service on GM Silverado HD and Sierra HD trucks
• Replacement of a worn engine coolant outlet during maintenance

Installation Notes and Tips

Verify inlet diameter, bolt spacing, and flange dimensions before installation. Because the gasket or seal is not included, reuse is not recommended if the sealing surface is worn; inspect the mating surfaces carefully and replace any damaged sealing components as needed. This part is supplied without a thermostat, so confirm your existing thermostat arrangement before assembly. Fits 2004-2010 Chevrolet Silverado 2500 HD, N/A; Fits 2007-2010 Chevrolet Silverado 3500 HD, N/A; Fits 2004-2010 GMC Sierra 2500 HD, N/A; Fits 2007-2010 GMC Sierra 3500 HD, N/A; Fits 2007 Chevrolet Silverado 2500 HD Classic, N/A; Fits 2007 Chevrolet Silverado 3500 Classic, N/A; Fits 2007 GMC Sierra 2500 HD Classic, N/A; Fits 2007 GMC Sierra 3500 Classic, N/A; Fits 2004-2006 Chevrolet Silverado 3500, N/A; Fits 2004-2006 GMC Sierra 3500, N/A.

Quality Assurance

Four Seasons manufactures this water outlet to meet or exceed OEM specifications for fit and function. Part number 86007 is engineered for the listed GM truck applications and built as a replacement coolant system component.