Four Seasons 86257 Engine Coolant Thermostat / Water Outlet Assembly

Overview of Four Seasons Water Outlet Assembly 86257

The Four Seasons Water Outlet Assembly 86257 is designed for reliable engine coolant management in select Mercedes-Benz models. This assembly includes a thermostat and is constructed from durable aluminum to ensure efficient heat dissipation and long-lasting performance.

• Material: Aluminum for enhanced durability and heat resistance
• Includes thermostat and gasket for complete installation
• Maximum height: 3.76 inches for precise fitment
• Bolt hole center-to-center distance: 2.29 inches for accurate mounting
• Inlet diameter: 1.71 inches to match OEM specifications
• Mount flange width: 0.39 inches for secure attachment
• Meets or exceeds OEM standards for quality and reliability
• Compatible with Mercedes-Benz GL350, GL450, ML350, and S350 models

Four Seasons Water Outlet Product Line Details

The Four Seasons Water Outlet product line focuses on engine coolant components that integrate thermostat functionality within the outlet assembly. This design simplifies replacement and maintenance by combining critical cooling system parts into a single unit. The Water Outlet assemblies are engineered to meet or exceed OEM requirements, ensuring compatibility and performance for specific vehicle applications.

Product Description and Specifications

This engine coolant thermostat and water outlet assembly (part number 86257) is crafted from aluminum, providing a lightweight yet robust solution for your vehicle's cooling system. The included thermostat regulates engine temperature by controlling coolant flow, while the gasket ensures a secure, leak-free seal. The precise dimensions, including a 3.76-inch maximum height and 2.29-inch bolt hole spacing, guarantee a proper fit for Mercedes-Benz GL350, GL450, ML350, and S350 models. The inlet diameter of 1.71 inches matches OEM specifications, facilitating seamless integration with existing coolant hoses.

Common Applications and Issues Addressed

• Replacement of faulty or leaking water outlet assemblies
• Thermostat failure causing engine overheating or poor temperature regulation
• Coolant leaks due to worn gaskets or damaged housing
• Preventing engine damage from improper coolant flow
• Maintaining optimal engine operating temperature for performance and efficiency

Installation Notes and Tips

When installing the Four Seasons Water Outlet Assembly 86257, ensure the engine is cool before beginning work. Remove the old assembly carefully to avoid damaging surrounding components. Use the included gasket to create a proper seal and tighten bolts to manufacturer torque specifications. Verify that the thermostat is correctly seated within the assembly to ensure accurate temperature regulation. After installation, refill the cooling system and bleed air pockets to prevent overheating.

Quality Assurance and Warranty

This Four Seasons Water Outlet Assembly meets or exceeds OEM standards, providing reliable performance for Mercedes-Benz GL350, GL450, ML350, and S350 vehicles. The part is manufactured with high-quality aluminum and includes all necessary components for installation. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.