Dorman 902-2085 Engine Coolant Thermostat Housing - Outer

Engine Coolant Thermostat Housing for GM 2.2L Applications

This Dorman engine coolant thermostat housing is a direct replacement for the stock housing used on select Chevrolet, Pontiac, and Oldsmobile vehicles. Built from aluminum with a natural finish, Dorman 902-2085 is engineered to match original fit and withstand repeated temperature cycling in the cooling system.

Key Features

• Aluminum construction for strength and heat resistance
• Natural finish housing for OE-style appearance
• Five mounting holes for secure installation
• Inlet port diameter: 1.23
• Outlet port diameter: 2.4
• Flange thickness: 0.77
• Thermostat not included
• Gasket or seal not included
• Bleeder valve not included

Detailed Description

Dorman 902-2085 is an engine coolant thermostat housing designed to replace the original housing on specified GM compact and midsize vehicles. It is built to match the fit and durability of the factory part while handling the thermal stress common in cooling system service. This housing is used on 2002-2005 Chevrolet Cavalier, 2004-2005 Chevrolet Classic, 2002-2005 Pontiac Grand Am, 2002-2005 Pontiac Sunfire, and 2002-2004 Oldsmobile Alero, all in the outer housing position. This part cross-references Four Seasons 85360 and Motorad CH5360 for the same application. Dorman 902-2085 is a practical OE-style replacement when the original thermostat housing is cracked, warped, or leaking.

What This Part Helps Address

• Coolant leaks from a damaged thermostat housing
• Warping or cracking caused by heat cycling
• Improper sealing at the thermostat housing interface
• Cooling system service issues on Chevrolet Cavalier and Pontiac Sunfire applications
• Replacement needs for Pontiac Grand Am, Chevrolet Classic, and Oldsmobile Alero outer housing locations

Installation Notes and Tips

Verify the vehicle year, make, model, and outer housing position before installation. Transfer or source the thermostat, gasket, seal, bolts, and O-rings separately if required for the repair, since they are not included. Clean the mating surfaces thoroughly and inspect the cooling system for corrosion or residue before installing the new housing. Confirm port alignment and mounting-hole spacing against the original part before final tightening.

Quality Assurance

This Dorman thermostat housing is engineered to match stock fit and durability for the listed applications. Its aluminum construction is selected to handle extreme temperature changes and support long service life in the cooling system.