Four Seasons 86163 Engine Coolant Thermostat Housing

Integrated Thermostat Housing for Porsche Cooling Service

Four Seasons 86163 is an integrated engine coolant thermostat housing built from aluminum for a direct-fit cooling system repair. It includes the thermostat and meets or exceeds OEM requirements, making it a practical choice for Porsche 911, Boxster, and Cayman applications that need a thermostat housing replacement.

Key Features

• Aluminum thermostat housing for corrosion-resistant cooling system service
• Integrated thermostat included for a complete housing-and-thermostat assembly
• Meets or exceeds OEM specifications
• Integrated thermostat housing style for Porsche cooling system repairs
• Inlet port diameter: 1.76 in; flange thickness: 0.39 in
• Bolt hole center to bolt hole center: 1.9 in; overall height: 4.92 in
• Four Seasons 86163 is listed as a thermostat housing in the Thermostat and Housing category

Detailed Description

This Four Seasons thermostat housing is engineered as an integrated coolant outlet assembly for Porsche cooling systems. The aluminum construction supports reliable fitment and thermal stability, while the included thermostat simplifies replacement of a worn or leaking housing on Porsche 911, Porsche Boxster, and Porsche Cayman models. Four Seasons 86163 is a direct replacement style part for vehicles that use an integrated thermostat housing design.

This part cross-references Gates 33950 for the same application. It also cross-references URO 99610601361 for the same application.

Vehicle Fitment

• Fits 1999-2008 Porsche 911, N/A; thermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit; thermostat housing.
• Fits 1997-2008 Porsche Boxster, N/A; thermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit; thermostat housing.
• Fits 2006-2008 Porsche Cayman, N/A; thermostat included in Engine Coolant Thermostat/Water Outlet Assembly Kit; thermostat housing.

Common Repair Uses

• Replacing a cracked or warped thermostat housing
• Restoring proper coolant flow control in the engine cooling system
• Addressing coolant leaks at the thermostat housing area
• Correcting overheating caused by a sticking thermostat assembly
• Servicing a worn integrated thermostat housing on Porsche 911, Boxster, or Cayman models

Installation Notes and Tips

Verify the housing style, port dimensions, and bolt pattern before installation. The gasket or seal is not included, so confirm the required sealing components for your application before assembly. Clean the mating surfaces thoroughly and inspect adjacent cooling system parts for wear or contamination during service.

Quality Assurance

Four Seasons 86163 is manufactured to meet or exceed OEM requirements for the listed Porsche applications. The part number 86163 is used across cooling system replacement catalogs for Porsche 911, Boxster, and Cayman thermostat housing service.