Four Seasons 86004 Engine Coolant Thermostat Housing

Integrated Thermostat Housing for GM Cooling Systems

Four Seasons 86004 is an integrated engine coolant thermostat housing built from aluminum for a direct-fit cooling system repair. It includes the thermostat and gasket or seal, and it meets or exceeds OEM requirements for the listed applications.

Compatible with 2012-2013 Chevrolet Impala and 2015 Chevrolet Impala / Impala Limited, this Four Seasons thermostat housing is a practical replacement when the original housing is cracked, warped, or leaking. The Four Seasons thermostat housing line focuses on complete engine coolant components for straightforward service.

Key Features

• Aluminum integrated thermostat housing for cooling system service
• Thermostat included for a complete housing assembly
• Gasket or seal included
• Meets or exceeds OEM specifications
• Inlet port diameter: 1.25 in.
• Bolt hole center to bolt hole center: 1.55 in.
• Flange thickness: 1.7 in.
• Overall height: 2.07 in.

Detailed Product Description

Four Seasons 86004 is an integrated thermostat housing designed for engine coolant temperature control and coolant routing in the Chevrolet Impala platform. The aluminum construction supports a durable replacement for the original housing, while the included thermostat and seal simplify the repair path for cooling system leaks, temperature regulation issues, and housing-related service needs. This part cross-references OE-style numbers such as 12632932 and W98534 for the same application.

Fits 2012-2013 Chevrolet Impala, thermostat housing. Fits 2015 Chevrolet Impala, thermostat housing. Fits 2015 Chevrolet Impala Limited, thermostat housing. Use Four Seasons 86004 when replacing a worn or leaking thermostat housing on these vehicles.

Common Repair Uses

• Coolant leaks at the thermostat housing
• Cracked or warped housing surfaces
• Thermostat replacement during cooling system service
• Temperature control concerns tied to housing wear
• Maintenance on Chevrolet Impala cooling system components

Installation Notes and Tips

Verify the inlet port diameter, bolt-hole spacing, and flange dimensions against the original part before installation. Clean the mating surfaces thoroughly, inspect the cooling system for contamination or damaged hoses, and refill the system with the correct coolant after installation. Bleed air from the system according to the vehicle service procedure to help restore proper coolant flow.

Quality Assurance

Four Seasons 86004 is built to meet or exceed OEM requirements for the listed fitments and is part of Four Seasons' thermostat housing product line for engine coolant components.