Dorman 902-2122 Engine Coolant Thermostat Housing Assembly

Dorman 902-2122 Thermostat Housing Assembly

Dorman 902-2122 is an engine coolant thermostat housing assembly built for specified vehicles, including the 2016-2019 Buick Cascada. It combines the thermostat housing, thermostat, gasket, and sensor in one replacement assembly for a direct-fit cooling system repair.

Key Features

• Engine coolant thermostat housing assembly with integrated cover
• Plastic housing in black finish
• Includes thermostat, gasket, and sensor
• 1 outlet port with 4 mounting holes
• Thermostat opening temperature: 181 degrees
• Gasket included; mounting hardware not included
• Part number: 902-2122

Detailed Description

This Dorman thermostat housing assembly is engineered to match the fit and durability of the original housing on the listed application. The plastic housing is built to handle repeated temperature swings in the cooling system, helping maintain a secure seal and stable coolant flow. For Buick Cascada owners searching for a replacement thermostat housing assembly, Dorman 902-2122 provides the housing, thermostat, gasket, and sensor in one service part. This part cross-references 990-181 and 55492938 for the same application.

What It Helps Repair

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Faulty thermostat operation affecting engine temperature control
• Sensor-related cooling system service issues
• Repeated sealing problems at the housing-to-engine interface

Installation Notes

Verify the flange dimensions, inside diameter, and mounting hole pattern before installation. Replace the gasket during service and inspect the mating surfaces for debris or damage. Mounting hardware is not included, so reuse or source the correct bolts as needed. Confirm the thermostat housing assembly matches the vehicle’s cooling system layout before installation on a 2016-2019 Buick Cascada.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability requirements for the listed vehicles. The assembly is built for regular-duty service and is intended to withstand extreme temperature changes for extended service life.