Four Seasons 36990 Engine Cooling Fan Clutch

Reliable Engine Cooling Fan Clutch for Dodge, Ford, and Mercury Vehicles

The Four Seasons Fan Clutch 36990 is designed to provide dependable engine cooling performance for heavy-duty applications. Engineered with durable aluminum construction, this fan clutch is compatible with a range of Dodge, Ford, and Mercury models, including the Ford F-150, Dodge Ramcharger, and Mercury Capri.

• Heavy-duty aluminum material for durability and heat resistance
• Non-electronic, flange-mounted design with 4 bolt holes
• Clutch maximum diameter of 7.2 inches and overall height of 3.47 inches
• Compatible with multiple models such as Ford Bronco, E-250 Econoline, and Dodge D250
• Meets or exceeds OEM specifications for reliable performance

Four Seasons Fan Clutch Product Line Overview

The Four Seasons Fan Clutch line focuses on heavy-duty engine cooling components designed to maintain optimal engine temperatures under demanding conditions. This product line emphasizes durability and performance, making it suitable for trucks and vans requiring robust cooling solutions. The 36990 model exemplifies this with its aluminum construction and flange mounting, ensuring a secure fit and consistent operation.

Product Details and Specifications

This engine cooling fan clutch features a raw aluminum finish and is built for heavy use. It includes four bolt holes with 5/16-18 threaded holes for mounting, and a flange mounting type that ensures a secure installation. The clutch has a maximum diameter of 7.2 inches (182.9 mm) and an overall height of 3.47 inches (88.1 mm). The distance from the clutch to the mounting flange is 1.75 inches, with a pilot depth of 1.03 inches and a pilot diameter of 0.63 inches. The fan bolt circle measures 3.25 inches (82.6 mm), and the mount diameter is 2.59 inches (66 mm). This non-electronic, heavy-duty clutch is designed for reverse rotation and is performance rated to meet or exceed OEM standards.

Compatible Vehicles and Applications

• Dodge D150, D250, Ramcharger, W150, W250
• Ford Bronco, F-150, F-200, F-250, F-250 HD, F-350
• Mercury Capri, LTD, Mustang
• Ford E-150, E-250, E-350 Econoline and Club Wagon variants

Common Issues Addressed by This Fan Clutch

• Overheating due to inefficient fan engagement
• Excessive engine noise from worn or failing clutch
• Reduced fuel efficiency caused by fan drag
• Premature engine wear from poor cooling performance
• Inconsistent fan operation in heavy-duty driving conditions

Installation Notes and Tips

Installation requires removal of the existing fan clutch and mounting hardware, which is not included with this part. Ensure the mounting flange and bolt holes align correctly with your vehicle’s specifications. Use proper torque settings on the 5/16-18 bolts to secure the clutch. Verify the rotation direction matches your engine’s requirements (reverse rotation). It is recommended to inspect the fan blades and radiator for damage during installation.

Quality Assurance and Warranty

The Four Seasons Fan Clutch 36990 is a new, performance-rated part that meets or exceeds OEM specifications for durability and function. Manufactured with heavy-duty aluminum, it is designed to withstand demanding engine cooling conditions. While specific warranty details are not provided, Four Seasons products typically adhere to industry standards for quality and reliability.