Dorman 902-2018 Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for GM Vehicles

The Dorman 902-2018 engine coolant thermostat housing is designed to provide a durable and precise fit for a range of Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models. Engineered from metal with a natural finish, this thermostat housing ensures proper coolant flow and temperature regulation in your vehicle's cooling system.

• Constructed from durable metal material for long-lasting performance
• Includes a gasket for a secure, leak-free seal
• Features a 1.438-inch outlet port diameter for optimal coolant flow
• Equipped with an air vent (bleeder valve) to prevent air pockets
• Designed with two mounting holes, each 0.313 inches in diameter
• Housing neck angle of 180 degrees for precise fitment
• Package contains thermostat housing with gasket; bolts and thermostat not included

Detailed Product Description

The Dorman 902-2018 thermostat housing is specifically engineered to meet the cooling system requirements of various GM vehicles, including Buick LeMans, Chevrolet Camaro, GMC Jimmy, Oldsmobile Cutlass, and Pontiac Firebird. Its metal construction offers enhanced durability compared to plastic alternatives, resisting warping and cracking under high engine temperatures. The included gasket ensures a tight seal between the housing and engine block, reducing the risk of coolant leaks. The 1.438-inch outlet port diameter supports efficient coolant circulation, while the integrated air vent (bleeder valve) helps eliminate trapped air, improving overall cooling system performance. The housing neck angle of 180 degrees aligns with factory specifications for proper hose connection and fitment.

Compatible Vehicles and Applications

• Buick models such as LeMans and Skylark
• Chevrolet models including Bel Air, Blazer, C10, Camaro, Caprice, El Camino, Impala, Malibu, Nova
• GMC trucks and SUVs like Jimmy, K5 Blazer, C20 Suburban, K10, K20, and K30 series
• Oldsmobile Cutlass and Cutlass Supreme
• Pontiac Firebird and Grand LeMans

Common Issues Addressed by This Thermostat Housing

• Coolant leaks caused by cracked or warped thermostat housings
• Overheating due to improper coolant flow or air trapped in the cooling system
• Loose or damaged mounting points leading to coolant seepage
• Failure of the air vent (bleeder valve) resulting in air pockets
• Corrosion or wear compromising the housing’s sealing surface

Installation Notes and Tips

When installing the Dorman 902-2018 thermostat housing, ensure the engine is cool before beginning work. Remove the old housing carefully to avoid damaging mounting surfaces. Clean the mating surfaces thoroughly to ensure a proper seal with the included gasket. Note that bolts are not included, so reuse existing hardware if in good condition or source appropriate replacements. Verify the housing neck angle and outlet port diameter match your vehicle’s specifications for correct hose alignment. Bleed the cooling system after installation to remove any trapped air through the integrated air vent.

Quality Assurance and Warranty

Dorman manufactures this thermostat housing to meet or exceed OEM standards for fit, form, and function. The metal construction and included gasket contribute to reliable, leak-free operation. While bolts and thermostat are not included, the housing is designed for straightforward installation with factory components. Dorman typically offers a limited warranty on their parts; please refer to official Dorman documentation for specific warranty details related to part number 902-2018.