Four Seasons 46049 Engine Cooling Fan Clutch

Severe Duty Thermal Fan Clutch for Reverse Rotation Cooling

Four Seasons Fan Clutch 46049 is a thermal engine cooling fan clutch built for severe-duty service and reverse rotation applications. It uses an aluminum construction, a non-electronic design, and an OEM-matching fit profile for direct replacement on select Chevrolet, GMC, Saab, and Isuzu vehicles.

Compatible with 2006-2009 Chevrolet Trailblazer and GMC Envoy applications, this fan clutch is also used on 2008-2009 Saab 9-7x and 2008 Isuzu Ascender models with reverse rotation cooling fan setups. Four Seasons 46049 is a new, performance-rated replacement that meets or exceeds OEM requirements.

Key Features

• Thermal, severe-duty fan clutch for truck and SUV cooling systems
• Reverse rotation design for the listed applications
• Aluminum housing with raw aluminum finish
• Non-electronic clutch construction
• Performance rated and meets or exceeds OEM specifications
• 4-bolt mounting pattern with HEX mounting type
• Fan bolt circle: 3.81 in. / 96.8 mm
• Overall diameter: 7.4 in. / 188 mm
• Overall height: 4.27 in. / 108.3 mm

Product Details

Four Seasons Fan Clutch 46049 is part of the Four Seasons Fan Clutch line, a cooling-focused product range for replacement fan drive components. This severe-duty thermal fan clutch is built for reverse rotation operation and uses a 1.44 in. mount diameter, 1.18 in. pilot diameter, and 0.77 in. pilot depth for the specified fitments. The design is intended for vehicles that rely on a thermostatic fan drive to manage engine temperature under load, idle, and stop-and-go driving conditions. This part cross-references Dorman - HELP 46049 and Gates 22627 for the same application.

What This Fan Clutch Helps Address

• Engine temperature rise during low-speed or idle operation
• Reduced fan engagement in thermal fan clutch systems
• Cooling performance loss on reverse rotation fan drive setups
• Noise or inconsistency from a worn fan clutch assembly
• Cooling system strain in severe-duty truck and SUV use

Installation Notes and Tips

Verify reverse rotation, bolt pattern, pilot dimensions, and fan bolt circle before installation. This application uses 4 mounting holes and M8 x 1.25 hole thread specification, and mounting hardware is not included. Confirm clearance at the clutch-to-mounting flange distance of 1.54 in. and compare the existing fan drive layout to the replacement part before service. For best results, inspect the cooling fan, water pump area, and surrounding components for wear or damage during replacement.

Quality Assurance

Four Seasons 46049 is a new, performance-rated fan clutch that meets or exceeds OEM requirements for the listed applications. It is built as a severe-duty thermal replacement for select Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, and Isuzu Ascender cooling systems.

Compatible Vehicles

• Fits 2006-2009 Chevrolet Trailblazer, N/A — Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Thermo Fan Clutch; Fan Clutch
• Fits 2006-2009 GMC Envoy, N/A — Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Thermo Fan Clutch; Fan Clutch
• Fits 2008-2009 Saab 9-7x, N/A — High performance reverse rotation engine cooling fan clutch.; Fan Clutch
• Fits 2008 Isuzu Ascender, N/A — High performance reverse rotation engine cooling fan clutch.; Fan Clutch
• Fits 2006 Chevrolet Trailblazer EXT, N/A — Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Thermo Fan Clutch; Fan Clutch
• Fits 2006 GMC Envoy XL, N/A — Reverse Rotation; Severe Duty Thermal Fan Clutch; w/ Thermo Fan Clutch; Fan Clutch