Four Seasons 86281 Engine Coolant Thermostat Housing - Lower

Thermostat Housing for Equinox and Terrain

Four Seasons 86281 is an engine coolant thermostat housing built from aluminum for a direct-fit cooling system repair. It is supplied as a thermostat housing without the thermostat and without a gasket or seal, making it a focused replacement for the housing itself.

Compatible with 2015-2017 Chevrolet Equinox and 2015-2017 GMC Terrain applications, including the lower thermostat housing position on select 2016 models. Four Seasons thermostat housing 86281 is made to meet or exceed OEM requirements for fit and function.

Key Features

• Aluminum thermostat housing for cooling system service
• Engine coolant components replacement part
• Thermostat not included
• Gasket or seal not included
• Meets or exceeds OEM specifications
• Inlet port diameter: 1.94 in.
• Bolt hole center to bolt hole center: 2.71 in.
• Flange thickness: 0.39 in.
• Overall height: 6.49 in.

Product Details

This Four Seasons thermostat housing, part number 86281, is designed for cooling system repairs where the housing has cracked, warped, or begun leaking. The aluminum construction supports reliable coolant routing and stable thermostat housing performance in the engine coolant circuit. For shoppers searching for a thermostat housing for 2015-2017 Chevrolet Equinox or 2015-2017 GMC Terrain, this part provides a direct replacement option for the listed applications.

This part cross-references Focus Auto Parts 86281 for the same application.

Common Repair Uses

• Coolant seepage at the thermostat housing
• Cracked or damaged housing body
• Warped sealing surface at the coolant outlet
• Overheating caused by housing leakage
• Service replacement for a worn lower thermostat housing on select 2016 Equinox and Terrain models

Installation Notes

Verify the thermostat housing style, inlet diameter, and mounting dimensions before installation. Because the thermostat and gasket or seal are not included, transfer or source the correct related components separately as needed. Clean the mating surfaces thoroughly and inspect the cooling system for contamination or pressure-related damage before reassembly.

Quality Assurance

Four Seasons lists this thermostat housing as meeting or exceeding OEM requirements, supporting a replacement that aligns with original equipment expectations for the specified Chevrolet Equinox and GMC Terrain applications.