Dorman 902-2059 Engine Coolant Thermostat Housing - Lower

Engine Coolant Thermostat Housing for Classic GM Applications

Dorman 902-2059 is a replacement engine coolant thermostat housing built for specified Cadillac, Buick, Chevrolet, and Pontiac vehicles from 1980-1982. It matches the stock housing’s fit and durability requirements and uses a metal construction with a natural finish for dependable cooling system service.

Key Features

• Metal thermostat housing with natural finish
• Includes gasket for a complete sealing surface
• 1.25 in. outlet port diameter
• 45-degree housing neck angle
• Two mounting holes with 0.313 in. diameter
• No thermostat included
• No bleeder valve and no O-rings required

Detailed Description

This Dorman thermostat housing, part number 902-2059, is engineered as a direct replacement for the original engine coolant thermostat housing on select 1980-1982 GM vehicles. It is built from metal to handle repeated temperature cycling in the cooling system and includes the gasket needed for installation. This part cross-references Motorad CH3059 for the same application.

Compatible With 1982 Cadillac DeVille, cover; 4 barrel carburetor, 1981-1982 Cadillac Eldorado, 1980-1982 Cadillac Fleetwood, 1982 Cadillac Seville, lower, 1982 Pontiac Bonneville, 1982 Pontiac Grand Prix, 1980-1981 Buick LeSabre, 1981 Buick LeSabre, cover; w/Federal Emissions, 1981 Buick Riviera, 1980-1981 Cadillac DeVille, 1981 Cadillac Seville, 1981 Chevrolet Caprice, cover; w/Federal Emissions, 1981 Chevrolet Impala, cover; w/Federal Emissions, 1981 Pontiac Bonneville, cover; w/Federal Emissions, 1981 Pontiac Catalina, cover; w/Federal Emissions, and 1981 Pontiac Grand Prix, cover; w/Federal Emissions.

What It Helps Address

• Coolant leaks at a cracked or warped thermostat housing
• Improper sealing at the thermostat housing gasket surface
• Corrosion or heat damage in the original housing
• Cooling system service needs on aging Cadillac, Buick, Chevrolet, and Pontiac engines

Installation Notes and Tips

Verify the outlet port diameter, mounting hole spacing, and 45-degree neck angle before installation. This housing includes a gasket, but bolts are not included. Confirm that your vehicle uses the listed position and emissions configuration before ordering. Dorman 902-2059 is designed for the specified applications and does not include a thermostat.

Quality Assurance

Dorman designs this replacement thermostat housing to match the fit and durability of the original part and to withstand extreme temperature changes for extended service life. Part number 902-2059 is built for direct replacement use in the listed cooling system applications.