Four Seasons 36919 Engine Cooling Fan Clutch

Four Seasons 36919 Fan Clutch Overview

The Four Seasons 36919 is a thermal engine cooling fan clutch built for standard-duty operation and direct-fit service on select import applications. It uses an aluminum construction, non-electronic design, and standard rotation to help maintain proper fan engagement in the cooling system.

Compatible With 1975-1987 Chevrolet LUV, 1981-1987 Isuzu Pickup, and 1984-1987 Isuzu Trooper applications, this Four Seasons fan clutch is a practical replacement for vehicles that need a thermal clutch with a 5-inch and 6-inch import-style configuration.

Key Features

• Four Seasons Fan Clutch, part number 36919
• Thermal, standard-duty design for engine cooling service
• Aluminum construction with raw aluminum finish
• Non-electronic clutch type
• Standard rotation (STD)
• Flange mounting style with 4-bolt, 4-hole layout
• 5.85 in. maximum clutch diameter
• Meets or exceeds OEM requirements
• Performance rated

Detailed Product Description

The Four Seasons 36919 fan clutch is engineered as a thermal replacement for import cooling systems that use a flange-mounted, standard-rotation clutch. Its aluminum body and standard-duty construction support consistent fan engagement behavior in everyday driving conditions. The clutch measures 5.85 inches in diameter, with a 2.09-inch distance from clutch to mounting flange, a 3-inch mount diameter, and a 4.8-inch fan bolt circle.

This part cross-references Gates 22094 and OSC 4894 for the same application. It is a direct service option for Chevrolet LUV, Isuzu Pickup, and Isuzu Trooper cooling system repairs where the original fan clutch has worn out or lost proper thermal response. Four Seasons 36919 is also listed under multiple interchange numbers, making it easier to match against existing catalog references during parts lookup.

Common Problems This Part Can Address

• Engine cooling fan not engaging at the correct temperature
• Excessive fan noise from a worn thermal clutch
• Cooling performance loss during stop-and-go driving
• Overheating caused by reduced fan drive response
• Replacement need after clutch bearing or internal fluid wear

Installation Notes and Tips

Verify standard rotation, flange mounting, bolt pattern, and pilot dimensions before installation. This clutch uses M6 x 1.0 hole threading and does not include mounting hardware. Confirm fan bolt circle and overall height against the original unit to ensure proper clearance in the engine bay.

For fitment reference, this part fits 1981-1987 Isuzu Pickup, N/A; fits 1984-1987 Isuzu Trooper, N/A; and fits 1975-1982 Chevrolet LUV, N/A. Use the vehicle’s original cooling system configuration to confirm the correct thermal fan clutch match before service.

Quality Assurance

Four Seasons designs this fan clutch to meet or exceed OEM specifications and rates it for performance use. The new, non-electronic thermal design is intended for direct replacement service in the listed applications.