Dorman 902-5031 Engine Coolant Thermostat Housing

Overview of Dorman Engine Coolant Thermostat Housing 902-5031

The Dorman 902-5031 engine coolant thermostat housing is designed for reliable cooling system performance in select Nissan vehicles. This metal thermostat housing comes with a gasket included and is engineered to meet the specific requirements of Nissan 200SX, 720, D21, and Pathfinder models.

• Durable metal construction in natural color
• Includes thermostat housing and gasket for a complete seal
• Outlet port diameter of 1.375 inches for precise fitment
• Two mounting holes with 0.313 inch diameter for secure installation
• 90-degree housing neck angle to match OEM specifications
• Compatible with Nissan 200SX, 720, D21, and Pathfinder vehicles
• Part number 902-5031 for accurate identification

Detailed Product Description

The Dorman 902-5031 thermostat housing is crafted from metal to provide strength and durability under engine operating conditions. Its natural finish ensures corrosion resistance while maintaining OEM appearance. The housing features a 90-degree neck angle and a 1.375-inch outlet port diameter, designed to fit precisely with the cooling system components of Nissan 200SX, 720, D21, and Pathfinder models. This part includes a gasket to ensure a proper seal and prevent coolant leaks. The housing has two mounting holes, each with a diameter of 0.313 inches, allowing for secure attachment without the need for additional O-rings or bolts, which are not included. The design excludes an air vent or bleeder valve, consistent with the original equipment specifications.

Compatible Nissan Models and Applications

This thermostat housing is compatible with the following Nissan vehicles:

• Nissan 200SX
• Nissan 720
• Nissan D21
• Nissan Pathfinder

Using the correct thermostat housing like the Dorman 902-5031 ensures proper coolant flow and temperature regulation in these models.

Common Issues Addressed by This Thermostat Housing

• Coolant leaks caused by cracked or damaged thermostat housing
• Overheating due to improper coolant flow
• Corrosion or wear compromising the housing seal
• Loose or broken mounting points affecting coolant system integrity
• Replacement of worn or missing gaskets to prevent leaks

Installation Notes and Tips

• Ensure the engine is cool before beginning installation to avoid burns
• Use the included gasket to create a proper seal and prevent leaks
• Verify mounting hole alignment and torque bolts to manufacturer specifications (bolts not included)
• Inspect surrounding hoses and connections for wear during installation
• Check coolant levels and system pressure after installation

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5031 thermostat housing undergoes quality inspections to ensure durability and performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in material and workmanship. Consult product documentation or the supplier for exact warranty terms.