Dorman 902-847 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-847 is a replacement engine coolant thermostat housing assembly built to match the fit and durability of the original housing on specified vehicles. It is made from metal and includes a thermostat and gasket for a direct repair on select Chevrolet Colorado, GMC Canyon, Hummer H3, and Hummer H3T applications.

Key Features

• Metal housing with a natural finish
• Includes thermostat and gasket
• 190 degree F thermostat opening temperature
• One outlet port with two mounting holes
• Engineered for repeated exposure to extreme temperature changes
• Compatible with 2004-2012 Chevrolet Colorado and GMC Canyon applications

Detailed Description

This Dorman thermostat housing assembly is designed as a direct replacement for the stock coolant outlet on select GM trucks and SUVs. The metal construction helps maintain structural integrity under heat cycling, while the included thermostat and gasket support a complete cooling system repair. Part number 902-847 is a practical choice for drivers servicing a 2004-2012 Chevrolet Colorado, 2004-2012 GMC Canyon, 2006-2010 Hummer H3, or 2009-2010 Hummer H3T.

This part cross-references Gates 34045 and Motorad 538-187 for the same application.

Common Repair Uses

• Replacing a cracked or warped thermostat housing
• Addressing coolant leaks at the housing flange or gasket surface
• Restoring proper thermostat operation in the cooling system
• Correcting overheating concerns caused by a faulty housing assembly
• Repairing a damaged coolant outlet on GM truck and SUV engines

Installation Notes and Tips

Verify the flange dimensions, outlet port layout, and 190 degree F thermostat specification before installation. Clean the mating surface thoroughly, inspect the coolant passages for debris, and replace coolant as needed after service. This assembly does not include mounting hardware.

Quality Assurance

Dorman designs this replacement housing to match the fit and durability of the original part and to handle repeated temperature swings for extended service life.