Four Seasons 85191 Engine Coolant Water Outlet

Engine Coolant Water Outlet for GM Trucks

Four Seasons Water Outlet 85191 is an aluminum engine coolant outlet for select Chevrolet and GMC applications. It includes the gasket or seal and is built in an outlet style without a thermostat, making it a direct replacement for cooling system service on GM trucks and vans.

Key Features

• Aluminum construction for cooling system durability
• Gasket or seal included for service-ready installation
• Outlet style, without thermostat
• Inlet diameter: 1.57 in.
• Maximum height: 3.71 in.
• Bolt hole center to bolt hole center: 2.3 in. and 2.375 in.
• Mounting flange width: 0.37 in.
• Meets or exceeds OEM requirements

Product Details

Four Seasons 85191 is an engine coolant water outlet designed for vehicles that use a separate thermostat housing arrangement. The aluminum body helps provide a stable mounting surface for the coolant passage, while the included gasket or seal supports a proper seal at installation. This part cross-references ACDelco 151816 and Dorman W5149 for the same application. It is a direct-fit cooling system component for Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, GMC Sierra 3500, and related GM platforms listed below.

Common Issues This Part Can Address

• Coolant seepage at the outlet or housing joint
• Cracked or corroded original coolant outlet
• Improper sealing after thermostat housing service
• Cooling system leaks affecting coolant level retention
• Replacement needs during intake or coolant component repair

Installation Notes and Tips

Verify inlet diameter, bolt spacing, and mounting flange dimensions before installation. Clean the mating surfaces thoroughly and inspect the gasket surface for corrosion or debris. Because this part is supplied without a thermostat, reuse or replace the thermostat separately if your application requires one. Confirm vehicle-specific fitment for the exact Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, or GMC Sierra 3500 configuration before service.

Quality Assurance

Four Seasons 85191 is listed as meeting or exceeding OEM specifications and is part of the Four Seasons Water Outlet line. It is engineered as an OE-style replacement for cooling system repair on select 2001-2007 Chevrolet and GMC applications, including 2001-2006 Chevrolet Silverado 2500 HD and 2001-2006 GMC Sierra 3500.