Four Seasons 86351 Engine Coolant Thermostat / Water Outlet Assembly

Engine Coolant Thermostat / Water Outlet Assembly

Four Seasons 86351 is an engine coolant thermostat and water outlet assembly built for Volvo cooling system service. It combines the thermostat and outlet in one plastic housing and includes the gasket or seal for a cleaner repair on the specified Volvo applications.

Compatible with select Volvo S90, XC40, XC90, XC60, S60, V60, S80, and XC70 models, this Four Seasons water outlet line part is engineered and tested for dependable operation. The 86351 assembly is a direct-fit cooling component for vehicles using the 105 degrees Celsius thermostat specification noted in the fitment data.

Key Features

• Four Seasons Water Outlet line part number 86351
• Engine coolant thermostat / water outlet assembly
• Thermostat included
• Gasket or seal included
• Plastic housing construction
• Inlet diameter: 1.365 in.
• Mounting flange width: 0.517 in.
• Overall height: 5.58 in.
• Outlet style with thermostat

Detailed Description

The Four Seasons 86351 is a cooling system service part for Volvo engines that need a thermostat-integrated water outlet assembly. Four Seasons backs this Water Outlet product line with more than 50 years of mobile A/C experience and states that its products are engineered and tested for years of trouble-free operation. This part cross-references Genuine 31686560 for the same application.

Use this assembly when servicing the coolant outlet and thermostat housing on compatible Volvo S90, XC40, XC90, XC60, S60, V60, S80, and XC70 vehicles. The integrated design helps restore proper coolant routing and thermostat control in one replacement component. Part number 86351 is also referenced by Focus Auto Parts 86351.

What It Is Used For

• Replacing a cracked or leaking coolant outlet housing
• Restoring thermostat function in the cooling circuit
• Addressing coolant seepage at the housing seal
• Correcting overheating caused by thermostat or outlet failure
• Servicing Volvo cooling system components with the specified 105 degrees Celsius thermostat setup

Installation Notes and Tips

Verify engine code and cooling system configuration before installation. Confirm the inlet diameter, mounting flange width, and thermostat specification match the original part on the vehicle. Clean the mating surfaces thoroughly before installing the included gasket or seal, and refill and bleed the cooling system according to Volvo service procedures after replacement.

Fits 2017-2022 Volvo S90, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2019-2022 Volvo XC40, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2016-2022 Volvo XC90, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2015-2020 Volvo XC60, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2015-2018 Volvo S60, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2017-2018 Volvo S60 Cross Country, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2015-2018 Volvo V60, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2017-2018 Volvo V60 Cross Country, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2017 Volvo V90 Cross Country, N/A, w/ 105 Degrees Celsius Thermostat; Water Outlet. Fits 2015-2016 Volvo S80, N/A, Water Outlet. Fits 2015-2016 Volvo XC70, N/A, Water Outlet.

Quality Assurance

Four Seasons states that its products are engineered and tested to provide years of trouble-free operation. The brand’s Water Outlet line is supported by more than 50 years of mobile A/C experience, with a focus on reliable replacement parts for cooling system service.