Dorman 902-2129 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-2129 is a replacement engine coolant thermostat housing assembly for select Saturn models. It is built from aluminum with a natural finish and includes the thermostat, O-ring seal, and a bleeder hole for service-friendly cooling system maintenance.

Compatible with Saturn SC1, SC2, SL, SL1, SL2, SW1, SW2, and SC applications, this thermostat housing assembly is engineered to match the fit and durability of the original housing on the vehicle. The 192 degree Fahrenheit thermostat helps maintain proper engine operating temperature in Saturn SC1 and Saturn SL cooling system repairs.

• Aluminum housing with natural finish
• Includes thermostat and O-ring seal
• 192 degree Fahrenheit thermostat opening temperature
• One outlet port with bleeder hole
• Two mounting holes and 2.5-inch bolt hole center spacing
• OE-style replacement for select Saturn cooling system service

Detailed Product Overview

This Dorman thermostat housing assembly is designed for Saturn SC1, SC2, SL, SL1, SL2, SW1, SW2, and SC models across the listed model years. The aluminum construction is selected for durability in high-temperature cooling system environments, while the integrated thermostat and O-ring simplify replacement of a worn or leaking housing. Dorman 902-2129 cross-references 21006065 for the same application.

Common Repair Uses

• Replacing a cracked or warped thermostat housing
• Repairing coolant leaks at the housing or seal surface
• Restoring proper engine warm-up and temperature control
• Addressing thermostat-related overheating or slow warm-up concerns
• Servicing a bleeder-equipped Saturn cooling system

Installation Notes

Verify the housing flange dimensions, 1-inch inside diameter, and 2-bolt mounting pattern before installation. Clean the mating surface thoroughly, inspect the coolant passages, and replace coolant as needed after service. This assembly includes the thermostat and O-ring; mounting hardware is not included.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match the fit and durability of the stock part and to withstand repeated temperature changes for extended service life.