Dorman 902-2027 Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for GM Vehicles

The Dorman 902-2027 engine coolant thermostat housing is designed to provide a durable and precise fit for select Buick, Chevrolet, Oldsmobile, and Pontiac models. Engineered with quality metal construction and a natural finish, this thermostat housing ensures efficient coolant flow and temperature regulation.

• Constructed from durable metal material for long-lasting performance
• Includes a gasket for a secure, leak-free seal
• Features a 1.313-inch outlet port diameter for proper coolant flow
• Equipped with an air vent (bleeder valve) to prevent air pockets
• Two mounting holes with 0.313-inch diameter for secure installation
• Housing neck angle of 180 degrees for correct fitment
• Package contains thermostat housing with gasket; bolts and thermostat not included

Detailed Product Description

The Dorman 902-2027 thermostat housing is specifically designed for compatibility with Buick Cutlass, Cutlass Supreme, Chevrolet Lumina, Oldsmobile Cutlass, and Pontiac Grand Prix and Regal models. Its metal construction offers resistance to heat and corrosion, ensuring reliable operation within the engine cooling system. The included gasket helps maintain a tight seal between the housing and engine block, reducing the risk of coolant leaks. The 180-degree housing neck angle and 1.313-inch outlet port diameter are engineered to match OEM specifications, facilitating proper coolant circulation. Additionally, the built-in air vent (bleeder valve) allows trapped air to escape, preventing overheating and maintaining system efficiency.

Common Applications and Issues Addressed

• Replacement for cracked or damaged thermostat housings causing coolant leaks
• Resolving overheating issues due to improper coolant flow
• Eliminating air pockets in the cooling system with the integrated bleeder valve
• Restoring proper mounting alignment with two precise mounting holes
• Preventing corrosion-related failures in older thermostat housings

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly to ensure a proper seal with the included gasket. Align the housing using the two mounting holes and torque bolts to manufacturer specifications (bolts not included). Verify the air vent is unobstructed to allow proper bleeding of air from the system. After installation, refill the cooling system and check for leaks during engine warm-up.

Quality Assurance and Warranty

Dorman manufactures the 902-2027 thermostat housing to meet or exceed OEM standards for fit, form, and function. The metal construction and included gasket contribute to a reliable seal and long service life. While bolts and thermostat are not included, this housing is designed for straightforward replacement in compatible Buick, Chevrolet, Oldsmobile, and Pontiac models. Warranty coverage details can be obtained from Dorman's official documentation to ensure confidence in product quality.