Dorman 902-2068 Engine Coolant Thermostat Housing - Upper

Dorman 902-2068 Engine Coolant Thermostat Housing

Dorman 902-2068 is a metal engine coolant thermostat housing built to match the fit and durability of the original housing on specified vehicles. It is made for cooling system service where a direct replacement housing with an integrated gasket is needed, and it is engineered to handle repeated temperature swings.

Key Features

• Metal construction with a natural finish
• Outlet port diameter: 2 in.
• Gasket or seal included
• Air vent (bleeder valve) included
• Four mounting holes with 0.313 in. diameter
• Package contents: thermostat housing with gasket
• Thermostat not included

Detailed Description

This Dorman thermostat housing is a direct-fit replacement for cooling system repair on 2001-2004 Chevrolet Silverado 2500 HD, 2001-2004 Chevrolet Silverado 3500, 2001-2004 GMC Sierra 2500 HD, and 2001-2004 GMC Sierra 3500 applications. The part number 902-2068 is designed for vehicles that need a replacement engine coolant thermostat housing with the correct outlet size, mounting pattern, and bleeder valve configuration. This part cross-references Four Seasons 85253 for the same application.

Common Problems This Part Can Address

• Cracked or warped thermostat housing
• Coolant leaks at the housing-to-engine sealing surface
• Air trapped in the cooling system after service
• Corrosion or wear at the original housing outlet
• Improper thermostat housing fit during cooling system repair

Installation Notes and Tips

Verify engine and cooling system configuration before installation. Transfer no thermostat from this listing, since the thermostat is not included. Clean the mating surfaces thoroughly, inspect the gasket surface for damage, and confirm the bleeder valve is positioned for proper air removal during refill. Use the correct torque sequence for the mounting holes to help maintain a secure seal.

Quality Assurance

Dorman designs this replacement housing to match stock fit and durability requirements for the listed Chevrolet Silverado and GMC Sierra applications. The metal construction is selected to withstand extreme temperature changes and support long service life in cooling system use.