Dorman 902-2691 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-2691 is a replacement engine coolant thermostat housing assembly for select Saturn, Cadillac, and Saab applications. It matches the stock housing assembly’s fit and durability requirements while using aluminum and steel construction to handle repeated temperature swings.

Key Features

• Aluminum and steel construction with a natural finish
• Includes thermostat and gasket for a complete housing service
• 180 degree Fahrenheit thermostat opening temperature
• 1.417 inside diameter with a single outlet port
• Two mounting holes with 2.561 bolt hole center spacing
• Gasket seal included; bleeder hole not present

Detailed Description

This Dorman thermostat housing assembly is built as a direct replacement for the original coolant outlet on vehicles such as the 2001-2005 Saturn L300, 2003-2004 Cadillac CTS, 1999-2003 Saab 9-5, and other listed applications. Part number 902-2691 is engineered to match the original housing’s fit and service requirements, helping maintain proper coolant routing and thermostat control in the engine cooling system. This part cross-references Motorad 349-174 and OE number 55353492 for the same application.

What It Helps Address

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Improper thermostat operation from a worn housing assembly
• Cooling system service needs on Saturn L300, Cadillac CTS, and Saab 9-5 models
• Temperature control issues related to a failing housing or thermostat interface

Installation Notes and Tips

Verify the vehicle application before installation. This assembly uses a gasket seal and does not include mounting hardware, so reuse or replace fasteners as needed during service. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or damage before installing the new housing. Confirm the thermostat opening temperature is correct for the application; this unit opens at 180 degrees Fahrenheit.

Quality Assurance

Dorman designs this replacement housing assembly to match the fit and durability of the original part and to withstand extreme temperature changes for extended service life. It is a regular-grade replacement component for select OE-style cooling system repairs.