Dorman 902-5140 Engine Coolant Thermostat Housing Assembly

Reliable Engine Coolant Thermostat Housing Assembly for Nissan and Infiniti

The Dorman 902-5140 Engine Coolant Thermostat Housing Assembly is designed to maintain optimal engine temperature for select Nissan and Infiniti vehicles. This metal thermostat housing assembly includes a thermostat and gasket, ensuring a complete solution for your cooling system needs.

• Durable metal construction with black finish for corrosion resistance
• Includes thermostat calibrated to open at 180°F for precise temperature control
• Comes with a gasket to ensure a secure, leak-free seal
• Designed with three mounting holes for secure installation
• Compatible with multiple Nissan and Infiniti models including 370Z, Maxima, Q50, FX35, and more

Product Details and Specifications

This engine coolant thermostat housing assembly features a 1.185-inch inside diameter and a flange measuring 4.11 inches wide by 2.75 inches long, with a thickness of 0.67 inches. The assembly includes one outlet port and is designed without a bleeder hole. The mounting hardware is not included, but the housing has three mounting holes spaced at 2.4, 2.58, and 3.53 inches center to center for proper fitment. The included thermostat opens at 180 degrees Fahrenheit, helping regulate engine temperature effectively.

Compatible Nissan and Infiniti Models

This Dorman 902-5140 thermostat housing assembly is compatible with a range of Nissan and Infiniti vehicles, including but not limited to:

• Nissan 370Z, Maxima, Altima
• Infiniti Q40, Q50, Q60, Q70, Q70L
• Infiniti FX35, FX37, EX35, EX37
• Infiniti G25, G37, M35h, M37
• Infiniti QX50, QX70

Common Applications and Problem Resolution

This thermostat housing assembly is used to replace worn or damaged components in the engine cooling system. It helps address issues such as:

• Engine overheating due to thermostat failure
• Coolant leaks from cracked or warped housing
• Inconsistent engine temperature regulation
• Failed thermostat causing poor heater performance
• Corrosion or damage to the original housing assembly

Installation Notes and Tips

Installation requires removal of the old thermostat housing and careful cleaning of the mounting surface. Since mounting hardware is not included, reuse existing bolts or source appropriate replacements. Ensure the gasket is properly seated to prevent coolant leaks. Verify thermostat orientation and torque mounting bolts to manufacturer specifications for a secure fit.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5140 thermostat housing assembly includes a thermostat and gasket for a complete replacement. While specific warranty details vary, Dorman typically offers limited warranties covering defects in material and workmanship to provide confidence in product reliability.