FOUR SEASONS 36704

Four Seasons 36704 is a standard-rotation severe-duty thermal fan clutch. The aluminium viscous clutch is used in many older passenger cars, pickups and vans requiring increased fan engagement at high temperature.

Application / fitment

The product has a broad catalogue range covering selected Buick, Cadillac, Chevrolet, Dodge, Ford, GMC, Oldsmobile and Pontiac vehicles. Confirm fitment by dimensions and the catalogue for the exact engine.

• selected Cadillac DeVille and Series 62 applications, including certain 1964 vehicles
• selected 1964–1965 Pontiac Bonneville and Catalina
• selected Pontiac Firebird and Grand Prix
• selected Ford F-100/F-150/F-250/F-350 and full-size Bronco
• selected Chevrolet Astro, pickups and other GM applications
• selected Dodge B250/B350 commercial applications

The broad application range does not make the clutch universal. Compare rotation, pilot diameter, fan bolt circle, height and mounting-flange position.

Technical information

• type: thermal fan clutch
• duty rating: severe duty
• rotation: standard / clockwise
• maximum diameter: 6.45" / approximately 163.83 mm
• overall height: approximately 3.66" / 92.9 mm
• pilot diameter: 0.63" / approximately 16.0 mm
• pilot depth: 0.63" / approximately 16.0 mm
• fan bolt circle: 3.25" / 82.6 mm
• mounting holes: 4
• bolt thread: 5/16"-18
• clutch-to-mounting-flange distance: approximately 1.63" / 41.4 mm
• material: aluminium
• hardware: verify physical package contents
• sales unit: 1 piece

Inspect water-pump and fan runout before installation. Tighten according to vehicle procedure and verify clearance from the radiator and shroud.