Dorman 902-800 Engine Coolant Thermostat Housing Assembly

Reliable Engine Coolant Thermostat Housing Assembly

The Dorman 902-800 Engine Coolant Thermostat Housing Assembly is designed to maintain optimal engine temperature for select Buick, Chevrolet, GMC, Oldsmobile, and Saab models. This assembly includes a thermostat calibrated to open at 190 degrees Fahrenheit, ensuring efficient coolant flow and engine performance.

• Constructed from durable aluminum with a natural finish for corrosion resistance
• Includes a thermostat and gasket for a complete installation
• Features a 1.21-inch inside diameter outlet port for precise coolant flow
• Two mounting holes with a 3.13-inch bolt hole center-to-center spacing
• Flange dimensions: 2.73 inches length, 3 inches width, and 0.365 inches thickness

Product Details and Specifications

This Dorman thermostat housing assembly is engineered with a regular grade aluminum material that offers strength and heat resistance. The natural color finish helps prevent rust and wear over time. The included thermostat opens at 190°F, which is suitable for maintaining proper engine operating temperature in vehicles such as the Chevrolet Trailblazer, GMC Envoy, Buick Rainier, and Saab 9-7x. The assembly comes with a gasket to ensure a secure seal, preventing coolant leaks. Note that mounting hardware is not included.

Compatible Vehicles and Applications

This thermostat housing assembly is compatible with a range of GM and Saab vehicles, including:

• Buick Rainier
• Chevrolet Blazer, Trailblazer, Trailblazer EXT
• GMC Envoy, Envoy XL, Envoy XUV, Bravada
• Oldsmobile models
• Saab 9-7x

Common Issues Addressed by This Part

• Engine overheating due to thermostat failure
• Coolant leaks from damaged or worn housing
• Inconsistent engine temperature regulation
• Corrosion or cracking in original thermostat housing
• Faulty thermostat causing poor engine performance

Installation Notes and Tips

Ensure the engine is cool before beginning installation. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly before installing the new gasket and housing assembly. Torque mounting bolts evenly to manufacturer specifications. Since mounting hardware is not included, reuse existing bolts if in good condition or source replacements separately.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 902-800 thermostat housing assembly includes a thermostat and gasket to provide a reliable seal and consistent performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship.