Dorman 902-5009 Engine Coolant Thermostat Housing

Overview of Dorman Engine Coolant Thermostat Housing 902-5009

The Dorman 902-5009 engine coolant thermostat housing is designed for reliable cooling system performance in select Nissan and INFINITI vehicles. Crafted from durable metal with a natural finish, this thermostat housing ensures proper coolant flow and engine temperature regulation.

• Constructed from sturdy metal material for durability
• Natural color finish for corrosion resistance
• 1.5-inch outlet port diameter for optimal coolant flow
• Three mounting holes with 0.313-inch diameter for secure installation
• 90-degree housing neck angle to fit specific engine configurations
• Does not include thermostat, gasket, bolts, or O-rings
• Compatible with multiple Nissan and INFINITI models

Detailed Product Description

The Dorman 902-5009 engine coolant thermostat housing is engineered to meet the specifications of various Nissan and INFINITI vehicles, including the 200SX, 300ZX, D21, Frontier, M30, Pathfinder, Pickup, QX4, and Xterra. Its metal construction provides strength and resistance to heat and corrosion, essential for maintaining the integrity of the cooling system. The natural finish helps prevent rust and extends the housing's service life.

This thermostat housing features a 1.5-inch outlet port diameter and a 90-degree neck angle, designed to match the original equipment configuration for proper coolant routing. The three mounting holes, each with a diameter of 0.313 inches, allow for a secure and precise fit. Note that this part does not include a thermostat, gasket, bolts, or O-rings, so these components must be sourced separately during installation.

Compatible Vehicles and Applications

• INFINITI 200SX, 300ZX, M30, QX4
• Nissan D21, Frontier, Pathfinder, Pickup, Xterra

This thermostat housing is intended for use in engine cooling systems to house the thermostat and direct coolant flow, helping to regulate engine temperature and prevent overheating.

Common Issues Addressed by This Thermostat Housing

• Cracked or damaged thermostat housing causing coolant leaks
• Corrosion or rust compromising housing integrity
• Improper coolant flow due to warped or broken housing
• Engine overheating from faulty thermostat housing fitment
• Replacement of worn or aged housing to maintain cooling system efficiency

Installation Notes and Tips

Ensure the engine is cool before beginning installation to avoid burns. Since the Dorman 902-5009 does not include a thermostat, gasket, or mounting bolts, these parts must be obtained separately. Clean the mounting surface thoroughly to ensure a proper seal. Use the correct torque specifications for the three mounting bolts to prevent leaks or damage. Verify the 90-degree neck angle aligns with your vehicle’s coolant routing before installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5009 thermostat housing undergoes rigorous quality control to ensure durability and performance. Please refer to Dorman’s warranty policy for specific coverage details.