Dorman 902-821 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing for GM Small Cars

Dorman 902-821 is a replacement engine coolant thermostat housing assembly built for specified Chevrolet, Pontiac, and Suzuki applications. It matches the stock housing’s fit and durability requirements while using a metal housing and included thermostat and gasket for a direct repair on cooling system service jobs.

Key Features

• Metal thermostat housing with natural finish
• Includes thermostat and gasket for the assembly
• 1.13 in. inside diameter
• 4 mounting holes and 1 outlet port
• 221 degrees F thermostat opening temperature
• Designed for Chevrolet Cruze, Sonic, Trax, Aveo, Aveo5, Cruze Limited, Pontiac G3, Pontiac G3 Wave, and Suzuki Swift+ applications

Detailed Description

Dorman 902-821 thermostat housing assembly is engineered for cooling system repairs where the original housing has cracked, warped, or begun leaking. The metal construction is built to handle repeated temperature swings, and the included gasket helps restore a proper seal at the housing flange. This part number 902-821 is a direct-fit replacement for a range of compact GM vehicles, including 2010-2016 Chevrolet Cruze, 2012-2018 Chevrolet Sonic, and 2013-2020 Chevrolet Trax applications.

This part cross-references Gates 34710 and Stant 49522 for the same application.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or heat-damaged plastic housing replacement needs
• Engine temperature control issues tied to a failing thermostat
• Seepage around the housing flange or gasket surface
• Cooling system service on Chevrolet Cruze, Sonic, and Trax models

Installation Notes and Tips

Verify the housing shape, bolt pattern, outlet port layout, and thermostat opening temperature before installation. Clean the mating surface thoroughly, inspect the coolant passages for residue, and replace coolant according to the vehicle service procedure after installation. Confirm fitment by year, make, model, and engine configuration for Chevrolet Cruze, Sonic, Trax, Aveo, Aveo5, Pontiac G3, Pontiac G3 Wave, and Suzuki Swift+ applications.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the original housing on specified vehicles. The metal construction is selected to withstand extreme temperature changes and support long service life in everyday cooling system operation.