Dorman 902-5930 Engine Coolant Thermostat Housing

Overview of Dorman Engine Coolant Thermostat Housing 902-5930

The Dorman 902-5930 engine coolant thermostat housing is designed for reliable cooling system performance in select Toyota and Scion vehicles. This black plastic thermostat housing provides a precise fit for models including the Toyota Echo, xA, xB, and Yaris, ensuring proper coolant flow and engine temperature regulation.

• Durable black plastic construction for corrosion resistance
• Outlet port diameter of 1.28 inches for accurate coolant flow
• Two mounting holes with 0.28-inch diameter for secure installation
• 50-degree housing neck angle to match OEM specifications
• Includes thermostat housing only; thermostat and bolts not included

Detailed Product Description

The Dorman 902-5930 thermostat housing is engineered to meet the exact specifications required for the cooling systems of Toyota Echo, xA, xB, and Yaris models, as well as compatible Scion vehicles. Constructed from durable plastic, this housing resists corrosion and heat damage commonly found in engine compartments. The 1.28-inch outlet port diameter ensures proper coolant flow, while the 50-degree neck angle aligns with factory design for seamless integration. With two mounting holes sized at 0.28 inches, the housing secures firmly to the engine block. This part does not include a thermostat, gasket, or bolts, so those components must be sourced separately.

Common Applications and Issues Addressed

• Replacement for cracked or leaking thermostat housing
• Restores proper coolant circulation to prevent engine overheating
• Eliminates coolant leaks caused by warped or damaged housings
• Supports engine temperature regulation in Toyota Echo, xA, xB, and Yaris vehicles
• Prevents coolant contamination from external debris

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Inspect and replace the thermostat and gasket separately, as they are not included
• Clean mounting surfaces thoroughly to ensure a proper seal
• Use appropriate torque specifications for mounting bolts to prevent damage
• Verify the 50-degree neck angle aligns correctly with existing coolant hoses

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 902-5930 thermostat housing undergoes quality checks to ensure durability and performance in demanding engine environments. While this product does not include a thermostat or mounting hardware, it is backed by Dorman's limited warranty against defects in material and workmanship, providing confidence in its reliability for Toyota and Scion vehicle owners.