Four Seasons 86036 Engine Coolant Thermostat Housing - Lower

Thermostat Housing for Toyota and Lexus

Four Seasons 86036 is an engine coolant thermostat housing for select Toyota and Lexus applications. It is built from aluminum and meets or exceeds OEM requirements for a direct-fit cooling system repair.

Use this Four Seasons thermostat housing when replacing a worn or damaged housing on vehicles such as the Toyota Camry, Toyota Avalon, Lexus ES350, and Lexus RX350. Part number 86036 is supplied as a thermostat housing only, with no thermostat or gasket/seal included.

Key Features

• Aluminum thermostat housing construction
• Engine coolant components replacement part
• Meets or exceeds OEM specifications
• Style: without thermostat
• Gasket or seal not included
• Thermostat not included
• Inlet port diameter: 0.747 in
• Bolt hole center to bolt hole center: 2.815 in
• Flange thickness: 0.375 in
• Overall height: 2.58 in

Product Details

The Four Seasons thermostat housing, part number 86036, is a direct replacement engine coolant component for a range of Toyota and Lexus models. Its aluminum construction supports reliable coolant routing at the thermostat mounting point, while the OE-matching design helps maintain proper fit and sealing when paired with the correct thermostat and gasket for the application. This housing is used on 2006-2018 Toyota Avalon, 2007-2017 Lexus ES350, 2007-2017 Lexus RX350, 2007-2017 Toyota Camry, 2008-2017 Toyota Highlander, 2007-2017 Toyota Sienna, 2009-2016 Toyota Venza, 2015 Lexus RX450h lower, and 2006-2012 Toyota RAV4. This part cross-references Dorman 9025861 for the same application.

What It Helps Address

• Cracked or corroded thermostat housing
• Coolant leaks at the thermostat mounting area
• Improper sealing from a damaged housing flange
• Cooling system service on Toyota and Lexus V6 applications
• Replacement of a housing that no longer meets OE fit standards

Installation Notes and Tips

Confirm the vehicle year, engine configuration, and housing position before installation. This housing is sold without a thermostat and without a gasket or seal, so those components must be matched separately to the vehicle application. Clean the mating surfaces thoroughly and verify bolt-hole spacing and inlet diameter before assembly. For 2018 Lexus ES350, this listing applies to Japan-built vehicles with thermostat housing fitment.

Quality Assurance

Four Seasons identifies this thermostat housing as meeting or exceeding OEM specifications, making it a suitable OE-style replacement for cooling system repair on compatible Toyota and Lexus vehicles.