Four Seasons 86372 Engine Coolant Filler Neck

Engine coolant filler neck overview

This Four Seasons coolant filler neck is built for direct replacement service on the cooling system. It is a plastic engine coolant component with a 1.22 in outlet diameter and a design without a thermostat.

Part number 86372 is a practical choice for restoring proper coolant fill and routing in applications that use this style of neck. It is identified as a coolant filler neck and does not include a cap, clamps, or mounting hardware.

Key features

• Plastic construction for a lightweight cooling-system component
• 1.22 in outlet diameter for the specified connection size
• Thermostat-free design
• Cap not included
• Clamps not included
• Mounting hardware not included

Detailed product information

Four Seasons part number 86372 is an engine coolant filler neck designed for cooling-system service where this exact style is required. The component is part of the Coolant Filler Neck product line and is intended for applications that use a plastic filler neck with a 1.22 in outlet diameter and no thermostat provision. For buyers searching for a Toyota Highlander coolant filler neck or a 2020-2022 Toyota Highlander cooling system replacement, this part number 86372 matches the listed application.

This part cross-references Gates CO35091 for the same application.

What this part helps address

• Cracked or damaged coolant filler neck housing
• Improper coolant fill point connection
• Leaks at the filler neck assembly
• Cooling-system service issues caused by a worn plastic neck

Installation notes and tips

Verify the outlet diameter, thermostat configuration, and connection style before installation. Confirm that the vehicle uses a coolant filler neck without a thermostat and compare the existing part to part number 86372 before replacement. Because cap, clamps, and mounting hardware are not included, reuse or source the required related components separately as needed.

Quality assurance

Four Seasons states that its products are engineered and tested for long service life, and the brand draws on more than 50 years of mobile A/C experience. Part number 86372 is backed by that product-development approach for cooling-system repair work.