Four Seasons 86164 Engine Coolant Thermostat / Water Outlet Assembly

Reliable Engine Coolant Thermostat and Water Outlet Assembly

The Four Seasons Water Outlet 86164 is designed to maintain optimal engine temperature for select Buick, Cadillac, Chevrolet, and GMC vehicles. This assembly includes a thermostat and water outlet, crafted from durable aluminum to ensure long-lasting performance.

• Constructed from high-quality aluminum for durability
• Includes thermostat and gasket for a complete installation
• Designed with 2 mounting holes and precise bolt hole spacing of 3.42 inches
• Compatible with multiple models including Buick Regal, Chevrolet Camaro, and GMC Terrain
• Meets or exceeds OEM specifications for reliable fit and function

Product Line Overview: Four Seasons Water Outlet

The Four Seasons Water Outlet product line 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 86164 part number represents a unit that includes the thermostat, gasket, and aluminum housing, engineered to meet OEM standards for a precise fit on various GM vehicles.

Detailed Product Description

This engine coolant thermostat and water outlet assembly features a maximum height of 4.75 inches and an inlet diameter of 1.180 inches, providing compatibility with specific cooling system configurations. The mounting flange width measures 0.440 inches, and the assembly includes two mounting holes for secure attachment. While the bleeder screw is not included, the unit comes with a gasket to ensure a proper seal and prevent leaks. The single outlet design supports efficient coolant flow, helping maintain engine temperature within optimal ranges.

Common Applications and Issues Addressed

• Replacement of faulty or leaking water outlet assemblies on Buick Regal Sportback and Chevrolet Equinox
• Thermostat failure causing engine overheating in Cadillac CTS and GMC Acadia
• Corroded or damaged aluminum housing affecting coolant flow in Chevrolet Malibu Limited
• Coolant leaks due to worn gaskets in GMC Terrain and Buick Envision
• Maintaining proper engine temperature regulation in Chevrolet Traverse and Cadillac CT6

Installation Notes and Tips

When installing the Four Seasons Water Outlet 86164, ensure the mounting surface is clean and free of old gasket material. Use the included gasket to prevent coolant leaks and torque the mounting bolts to manufacturer specifications. Verify the thermostat is properly seated within the housing before securing the assembly. This part is compatible with specific Buick, Cadillac, Chevrolet, and GMC models, so confirm vehicle fitment prior to installation.

Quality Assurance and Warranty

The Four Seasons Water Outlet 86164 meets or exceeds OEM standards, providing reliable performance and fitment. Manufactured from aluminum, this assembly offers corrosion resistance and durability. The product includes a gasket and thermostat to ensure a complete and effective replacement. Warranty details are provided by Four Seasons and typically cover defects in materials and workmanship.