Dorman 902-5136 Engine Coolant Thermostat Housing Assembly

Reliable Engine Coolant Thermostat Housing Assembly for Lexus and Toyota

The Dorman 902-5136 Engine Coolant Thermostat Housing Assembly is designed to maintain optimal engine temperature for select Lexus and Toyota models. This assembly includes a thermostat calibrated to open at 180°F, ensuring efficient coolant flow and engine performance.

• Durable black plastic housing with a 1.125-inch inside diameter
• Includes thermostat and gasket for a complete installation
• Three mounting holes with precise 3-inch bolt hole center spacing
• Flange dimensions: 3.5 inches length, 3 inches width, and 0.3 inches thickness
• Single outlet port design for streamlined coolant flow
• Compatible with Lexus GS460, GS F, GX460, IS500, IS F, Land Cruiser, LC500, LS460, LS600h, LX570, RC F and Toyota Sequoia, Tundra models

Product Details and Specifications

The Dorman 902-5136 thermostat housing assembly is constructed from durable plastic material in black, providing corrosion resistance and long service life. The included thermostat opens at 180 degrees Fahrenheit, which is standard for maintaining proper engine operating temperature. The assembly features three mounting holes spaced 3 inches apart center-to-center, ensuring a secure fit. The flange measures 3.5 inches in length, 3 inches in width, and 0.3 inches in thickness, designed to match OEM specifications. A gasket is included to provide a reliable seal and prevent coolant leaks. This assembly does not include mounting hardware, so bolts must be sourced separately.

Compatible Vehicles and Applications

This thermostat housing assembly is compatible with a range of Lexus and Toyota vehicles, including the Lexus GS460, GS F, GX460, IS500, IS F, Land Cruiser, LC500, LS460, LS600h, LX570, RC F, as well as the Toyota Sequoia and Tundra. It is ideal for owners seeking a direct replacement part that meets factory specifications.

• Prevents engine overheating by regulating coolant flow
• Resolves coolant leaks caused by damaged or cracked housing
• Restores proper thermostat function to maintain engine temperature
• Eliminates erratic temperature gauge readings
• Addresses coolant circulation issues in affected Lexus and Toyota models

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly before installing the new gasket and housing assembly. Use appropriate torque specifications for mounting bolts (not included) to prevent leaks or damage. Verify proper thermostat operation after installation by monitoring engine temperature during warm-up.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 902-5136 thermostat housing assembly includes a thermostat and gasket to provide a complete solution. While mounting hardware is not included, the assembly is designed for straightforward installation. Dorman typically offers a limited warranty on their parts; please refer to official Dorman documentation for specific warranty details.