Four Seasons 85688 Engine Coolant Thermostat Housing

Overview of Four Seasons Thermostat Housing 85688

The Four Seasons Thermostat Housing 85688 is designed for reliable engine cooling system performance in select Nissan and Infiniti vehicles. This integrated thermostat housing includes a thermostat and is engineered to meet or exceed OEM specifications, ensuring proper fit and function for models like the Nissan Altima, Maxima, Murano, Quest, and Infiniti I35.

• Constructed from durable aluminum for corrosion resistance
• Integrated thermostat housing style with included thermostat
• Outlet port diameter: 38.000 mm for precise coolant flow
• Inlet port diameter: 1.460 inches
• Flange thickness of 0.700 inches for secure mounting
• Bolt hole center-to-center distance of 3.57 inches
• Overall height of 5.000 inches
• Thermostat included, gasket or seal not included
• Compatible with Nissan Altima, Maxima, Murano, Quest and Infiniti I35

About the Four Seasons Thermostat Housing Product Line

The Four Seasons Thermostat Housing product line focuses on engine coolant components designed to maintain optimal engine temperature control. This line integrates the thermostat directly into the housing, simplifying installation and reducing potential leak points. The 85688 model exemplifies this approach by combining durable aluminum construction with precise port dimensions to ensure consistent coolant flow and temperature regulation.

Detailed Product Description

This engine coolant thermostat housing is crafted from aluminum, providing strength and resistance to corrosion common in cooling system components. The integrated thermostat housing style includes the thermostat itself, eliminating the need for separate parts and streamlining replacement. The outlet port diameter of 38.000 mm and inlet port diameter of 1.460 inches are designed to match OEM specifications, ensuring proper coolant circulation. The flange thickness of 0.700 inches and bolt hole spacing of 3.57 inches allow for secure and accurate mounting. With an overall height of 5.000 inches, this housing fits precisely within the engine bay of compatible Nissan and Infiniti models.

Common Applications and Issues Addressed

• Replacement for faulty or leaking thermostat housings
• Restores proper engine temperature regulation
• Prevents engine overheating due to thermostat failure
• Eliminates coolant leaks caused by cracked or corroded housings
• Ensures reliable coolant flow in Nissan Altima, Maxima, Murano, Quest, and Infiniti I35

Installation Notes and Tips

• Thermostat is included; however, a new gasket or seal must be sourced separately
• Ensure mating surfaces are clean and free of debris before installation
• Torque bolts to manufacturer specifications to avoid leaks or damage
• Inspect coolant hoses for wear during installation and replace if necessary
• Bleed the cooling system after installation to remove air pockets

Quality Assurance and Warranty

The Four Seasons Thermostat Housing 85688 meets or exceeds OEM standards for fit, form, and function. Manufactured with quality aluminum and precision engineering, this part is designed for durability and reliable performance. While specific warranty details are not provided here, Four Seasons products typically come with a limited warranty against defects in materials and workmanship.