Four Seasons 86177 Engine Coolant Thermostat / Water Outlet Assembly

Reliable Engine Coolant Thermostat and Water Outlet Assembly

The Four Seasons Water Outlet assembly with part number 86177 is designed to maintain optimal engine temperature for select BMW models. This engine coolant thermostat and water outlet assembly combines durable plastic construction with an integrated thermostat and gasket for a complete cooling system solution.

• Material: High-quality plastic for corrosion resistance
• Includes thermostat and gasket for easy installation
• Maximum height: 3.9 inches
• Bolt hole center-to-center distance: 3.09 inches
• Inlet diameter: 1.49 inches
• Mount flange width: 0.52 inches
• Meets or exceeds OEM specifications
• Compatible with multiple BMW models including 320i, 325Ci, 330i, X3, X5, and Z4

About the Four Seasons Water Outlet Product Line

The Water Outlet product line by Four Seasons focuses on engine coolant components that integrate the thermostat and water outlet into a single assembly. This design simplifies replacement and ensures proper coolant flow and temperature regulation. The 86177 part is engineered to meet or exceed OEM standards, providing reliable performance for BMW vehicles requiring this specific assembly.

Product Description and Compatibility

This engine coolant thermostat and water outlet assembly is constructed from durable plastic to resist corrosion and wear. It includes a pre-installed thermostat and gasket, streamlining the replacement process. The part’s dimensions, such as a 3.9-inch maximum height and 3.09-inch bolt hole spacing, ensure precise fitment. Compatible with BMW models including 320i, 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, 525i, 528i, 530i, X3, X5, Z3, and Z4, this assembly supports proper engine temperature regulation and coolant flow.

Common Issues Addressed by This Assembly

• Engine overheating due to faulty thermostat or water outlet
• Coolant leaks from damaged or worn water outlet housing
• Irregular engine temperature fluctuations
• Failed thermostat causing poor engine performance
• Corrosion or cracking in original plastic water outlet components

Installation Notes and Tips

• Ensure the engine is cool before beginning installation
• Replace the gasket included with the assembly to prevent leaks
• Verify bolt hole alignment using the 3.09-inch center-to-center measurement
• Check coolant levels and refill as necessary after installation
• Follow manufacturer torque specifications for mounting bolts

Quality Assurance and Warranty

The Four Seasons 86177 Water Outlet assembly meets or exceeds OEM specifications, ensuring compatibility and durability. The inclusion of the thermostat and gasket provides a comprehensive replacement part. While specific warranty details vary, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.