Four Seasons 36786 Engine Cooling Fan Clutch

Overview of Four Seasons Fan Clutch 36786

The Four Seasons Fan Clutch 36786 is engineered for severe duty applications, designed to maintain optimal engine temperature in heavy-duty Chevrolet and GMC trucks and vans. This engine cooling fan clutch is constructed from durable aluminum and built to meet or exceed OEM specifications, ensuring reliable performance in demanding conditions.

• Material: Aluminum construction for durability and heat resistance
• Designed for severe duty use, suitable for truck fan drives
• Non-electronic, mechanical fan clutch with 4 bolt holes and mounting holes
• Compatible with Chevrolet Express 2500/3500, GMC Savana 2500/3500, Sierra 2500 HD/3500, Silverado 2500 HD/3500
• Maximum clutch diameter: 7.4 inches; overall diameter: 188 mm (7.4 inches)
• Mounting type: Hex with M8 x 1.25 bolt thread
• Performance rated and new, not remanufactured

Four Seasons Fan Clutch Product Line Details

The Four Seasons Fan Clutch product line focuses on engine cooling components designed for severe duty and truck fan drive applications. This line emphasizes durability and performance under high-stress conditions, making it suitable for heavy-duty vehicles like Chevrolet and GMC trucks and vans. The 36786 model is part of this line, offering a robust aluminum construction and precise fitment to maintain engine cooling efficiency.

Detailed Product Description

The Four Seasons Fan Clutch 36786 is a mechanical, non-electronic fan clutch designed to regulate engine temperature by controlling the fan speed based on engine heat. Its aluminum body provides strength and heat dissipation, while the 4-bolt mounting system with M8 x 1.25 threads ensures secure installation. The clutch has a maximum diameter of 7.4 inches and an overall height of 4.27 inches (108.3 mm), with a 1.75-inch distance from clutch to mounting flange. This part is specifically engineered for severe duty use, making it ideal for heavy-duty Chevrolet Express, GMC Savana, Sierra, and Silverado models requiring reliable engine cooling fan operation.

Common Applications and Issues Addressed

• Replaces worn or failing fan clutches causing engine overheating
• Restores proper fan engagement in Chevrolet Express 2500/3500 and GMC Savana 2500/3500 vans
• Improves cooling efficiency in GMC Sierra 2500 HD/3500 and Silverado 2500 HD/3500 trucks
• Eliminates excessive fan noise due to slipping or stuck clutches
• Prevents premature engine wear caused by inadequate cooling

Installation Notes and Tips

• Ensure compatibility with your specific Chevrolet or GMC model before installation
• Use appropriate tools for hex mounting type and M8 x 1.25 bolt threads
• Mounting hardware is not included; reuse existing bolts or acquire new hardware as needed
• Check alignment and torque specifications to avoid damage or improper fit
• Inspect surrounding cooling system components during installation for optimal performance

Quality Assurance and Warranty

This Four Seasons Fan Clutch 36786 is a new, performance-rated part that meets or exceeds OEM standards for durability and function. Manufactured with precision aluminum and designed for severe duty applications, it provides reliable engine cooling for Chevrolet and GMC heavy-duty trucks and vans. Warranty details should be confirmed with the original equipment manufacturer or distributor.