Four Seasons 36921 Engine Cooling Fan Clutch

Four Seasons 36921 Fan Clutch Overview

The Four Seasons 36921 engine cooling fan clutch is a standard-duty thermal replacement built for import applications that need consistent fan engagement and stable cooling performance. It is a non-electronic, flange-mount unit made from aluminum with a raw aluminum finish.

Compatible With Toyota 4Runner, Toyota Pickup, Toyota Celica, and Toyota Corona applications across the listed model years, this Four Seasons fan clutch is a direct-fit cooling service part for standard rotation setups. The 36921 part number is also referenced in aftermarket cross listings for the same application.

Key Features

• Thermal, standard-duty fan clutch for engine cooling systems
• Aluminum construction with raw aluminum color
• Non-electronic design for mechanical fan control
• Flange mounting type with 4-bolt pattern
• Standard rotation (STD)
• Meets or exceeds OEM requirements
• Performance rated for cooling system service
• Clutch maximum diameter: 5.85 in.
• Overall height: 2.48 in.
• Fan bolt circle: 4.8 in. / 121.9 mm

Detailed Description

Four Seasons Fan Clutch 36921 is engineered as a thermal engine cooling fan clutch for import vehicles using a 5-inch or 6-inch clutch style. It features a 3.07 in. mount diameter, 0.63 in. pilot diameter, 0.75 in. pilot depth, and M6 x 1.0 bolt holes for flange mounting. This standard rotation unit is built for Toyota cooling system service where the mechanical fan must engage based on temperature demand.

Fits 1984-1995 Toyota 4Runner, N/A. Fits 1975-1995 Toyota Pickup, N/A. Fits 1975-1985 Toyota Celica, N/A. Fits 1975-1982 Toyota Corona, N/A. This part cross-references Monroe Shocks & Struts (e.g., 5564) for the same application.

Common Cooling Issues It Can Address

• Weak fan engagement at operating temperature
• Excessive engine temperature during idle or slow traffic
• Cooling fan noise caused by a worn clutch
• Reduced airflow through the radiator
• Inconsistent mechanical fan response on Toyota cooling systems

Installation Notes and Tips

Verify the fan bolt circle, mount diameter, pilot dimensions, and standard rotation before installation. Mounting hardware is not included, so reuse or source the correct fasteners separately. Confirm the vehicle uses a thermal, non-electronic flange-style fan clutch and match the application to the listed Toyota 4Runner, Pickup, Celica, or Corona fitment.

Quality Assurance

Four Seasons 36921 is a new replacement part that meets or exceeds OEM specifications and is performance rated for cooling system service. The Four Seasons Fan Clutch line is built for direct replacement use in standard-duty engine cooling applications.