Hayden 2656 Engine Cooling Fan Clutch

Hayden 2656 Thermal Fan Clutch

The Hayden 2656 is a standard-duty thermal engine cooling fan clutch built for reverse-rotation applications. It uses an aluminum construction, a flange mount, and a non-electronic design to support consistent fan engagement in select Lexus LS400 cooling systems.

Compatible With 1990-2000 Lexus LS400 applications, this Hayden Fan Clutch line part is built to meet or exceed OEM requirements and is performance rated for direct-fit cooling service. The Hayden Fan Clutch brand line focuses on replacement fan clutches for vehicles that rely on thermal control to manage engine temperature and fan speed.

Key Features

• Hayden 2656 thermal fan clutch for reverse-rotation cooling systems
• Standard-duty design for everyday engine cooling service
• Aluminum housing with raw aluminum finish
• Flange mounting style with 4-bolt, 4-hole pattern
• Non-electronic, thermal operation
• Meets or exceeds OEM requirements
• Performance rated for replacement use
• Fan bolt circle: 5.35 in. / 135.9 mm
• Mount diameter: 3.7 in. / 94 mm

Product Details

Part number 2656 is a thermal fan clutch with a 6.65 in. maximum diameter, 3.13 in. overall height, and a 2.55 in. distance from clutch to mounting flange. It uses an M6 x 1.0 hole thread pattern, a 0.63 in. pilot diameter, and a 0.91 in. pilot depth. This Hayden 2656 fan clutch is a direct replacement style for reverse-rotation Lexus LS400 cooling fan service, including 1990-1996 Lexus LS400 and 1997-1999 Lexus LS400 without trailer tow package, plus 2000 Lexus LS400 without towing package.

This part cross-references Gates 22178 and Dorman - HELP 77225 for the same application.

Common Problems It Can Address

• Engine temperature rise from a fan clutch that no longer engages correctly
• Excess fan noise caused by a worn thermal clutch
• Reduced cooling fan response in reverse-rotation systems
• Cooling performance issues on Lexus LS400 models with a failing clutch
• Inconsistent fan speed control during normal driving

Installation Notes

Verify reverse rotation, flange style, bolt pattern, and mounting dimensions before installation. Mounting hardware is not included. Confirm the vehicle’s cooling fan setup and application notes, especially towing-package exclusions on 1997-2000 Lexus LS400 models. Use the existing fan and mounting points only if they match the listed dimensions and thread pattern.

Quality Assurance

Hayden identifies this fan clutch as a new, standard-duty thermal replacement that meets or exceeds OEM specifications. The part is performance rated and built for direct replacement use in supported Lexus LS400 applications.