Dorman 902-5140 Engine Coolant Thermostat Housing Assembly

Engine Coolant Thermostat Housing Assembly

Dorman 902-5140 is a replacement engine coolant thermostat housing assembly for select Nissan and INFINITI vehicles. It is built with a metal housing, black finish, and integrated thermostat to match the stock housing layout on the listed applications, including Nissan 370Z, Nissan Maxima, and several INFINITI V6 models.

Key Features

• Metal thermostat housing for durable cooling system service
• Black finish with a 1.185 inside diameter
• Includes gasket and thermostat for a complete housing service
• Thermostat opens at 180 degrees F
• Three mounting holes with a single outlet port
• Designed for select Nissan 370Z, Nissan Maxima, INFINITI G37, Q50, Q70, QX50, QX70, and related applications

Detailed Description

This Dorman thermostat housing assembly is engineered to match the fit and durability of the original housing on specified vehicles. The metal construction is built to handle repeated temperature swings in the cooling system, while the integrated thermostat and included gasket simplify replacement of a worn or leaking housing. Part number 902-5140 is a direct-fit cooling system service component for applications such as 2009-2020 Nissan 370Z, 1995-2001 Nissan Maxima, and 2009-2020 INFINITI G37 and Q50 platform vehicles.

This part cross-references Stant 14318 and Motorad 343-180 for the same application.

What It Helps Fix

• Coolant leaks at the thermostat housing
• Cracked or warped plastic housing components
• Improper thermostat operation affecting engine temperature
• Cooling system service needs on high-mileage Nissan and INFINITI engines
• Temperature control issues caused by a worn housing or seal

Installation Notes and Tips

Verify engine code and housing style before ordering, since fitment varies by model year and platform. Clean the mating surface thoroughly before installation, replace any contaminated coolant, and torque fasteners evenly to help prevent leaks. This assembly does not include mounting hardware.

Quality Assurance

Dorman designs this replacement thermostat housing assembly to match stock fit and durability on the listed vehicles. The housing is built to withstand extreme temperature changes for extended service life, and the included gasket and thermostat support a complete cooling system repair.