Dorman 902-2046 Engine Coolant Thermostat Housing

Reliable Engine Coolant Thermostat Housing for Chevrolet and GMC

The Dorman 902-2046 engine coolant thermostat housing is designed to provide a durable and precise fit for select Chevrolet and GMC models. Engineered from metal with a natural finish, this thermostat housing ensures effective cooling system performance and long-lasting reliability.

• Constructed from durable metal material for strength and heat resistance
• Includes a gasket for a secure, leak-free seal
• Features a 1.625-inch outlet port diameter for proper coolant flow
• Equipped with two mounting holes, each 0.313 inches in diameter
• Incorporates an air vent (bleeder valve) to prevent air pockets
• Housing neck angle set at 90 degrees for precise fitment
• Package contains thermostat housing with gasket; bolts and thermostat not included

Detailed Product Description

The Dorman 902-2046 thermostat housing is specifically designed for compatibility with Chevrolet and GMC vans and trucks, including G10, G20, G30, P20, P30, P1500, P2500, and P3500 models. Its metal construction offers enhanced durability under high-temperature engine conditions. The natural color finish maintains a clean appearance while resisting corrosion. The housing features a 90-degree neck angle and a 1.625-inch outlet port diameter, ensuring proper coolant routing and system efficiency. The included gasket provides a reliable seal to prevent coolant leaks, and the built-in air vent (bleeder valve) helps eliminate trapped air, improving cooling system performance. This part does not include the thermostat or mounting bolts, allowing for flexible installation with existing hardware.

Common Applications and Issues Addressed

• Replacement for cracked or leaking thermostat housing
• Prevents coolant leaks that can cause engine overheating
• Resolves air pocket formation in the cooling system
• Restores proper coolant flow in Chevrolet and GMC vans and trucks
• Addresses corrosion or wear-related housing failures

Installation Notes and Tips

• Ensure the engine is cool before beginning installation
• Use the included gasket to achieve a proper seal and prevent leaks
• Inspect mounting holes and hardware for wear; bolts are not included
• Verify the 90-degree neck angle aligns with your vehicle’s coolant hoses
• Bleed the cooling system after installation to remove trapped air

Quality Assurance and Warranty

Dorman manufactures the 902-2046 thermostat housing to meet or exceed OEM specifications for fit, form, and function. The metal construction and included gasket contribute to a reliable, leak-resistant seal. While the product does not include a thermostat or mounting bolts, it is backed by Dorman’s quality standards. Please refer to Dorman’s warranty policy for specific coverage details.