Four Seasons 36945 Engine Cooling Fan Clutch

Reliable Engine Cooling Fan Clutch for GM Trucks and SUVs

The Four Seasons Fan Clutch 36945 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 Chevrolet, GMC, and Cadillac models, ensuring optimal cooling efficiency under demanding conditions.

• Heavy-duty aluminum material for durability and heat resistance
• Non-electronic, mechanical clutch type (C - heavy duty)
• Four bolt holes with M10 x 1.5 thread for secure mounting
• Maximum clutch diameter of 7.2 inches and overall diameter of 182.9 mm
• Compatible with multiple GM trucks and SUVs including Silverado, Sierra, Tahoe, Yukon, Escalade, and Avalanche

Four Seasons Fan Clutch Product Line Overview

The Four Seasons Fan Clutch line focuses on delivering reliable engine cooling components designed for heavy-duty use. This product line emphasizes performance-rated fan clutches that meet or exceed OEM specifications, providing consistent operation and durability. The 36945 model exemplifies this approach with its robust aluminum construction and precise fitment for GM vehicles.

Detailed Product Description and Specifications

This engine cooling fan clutch features a raw aluminum finish and a hex mounting type, ensuring a secure and precise installation. It includes four mounting holes and bolt holes, each designed with M10 x 1.5 threading. The clutch has a maximum diameter of 7.2 inches (182.9 mm) and an overall height of 3.47 inches (88.1 mm), with a pilot depth of 0.7 inches (17.8 mm) and pilot diameter of 1.18 inches (30 mm). The fan bolt circle measures 3.25 inches (82.6 mm), providing compatibility with a variety of fan blade assemblies. This non-electronic clutch operates with a reverse rotation, suitable for heavy-duty engine cooling needs.

Compatible Vehicles and Common Applications

• Chevrolet Silverado 1500, 2500, 3500 (including Classic and HD variants)
• GMC Sierra 1500, 2500, 3500 (including Classic and HD variants)
• Cadillac Escalade, Escalade ESV, Escalade EXT
• Chevrolet Avalanche 1500 and C1500
• GMC Yukon, Yukon XL 1500, Yukon XL 2500
• Chevrolet Suburban 1500, 2500 and Tahoe
• Chevrolet Express 1500, 2500, 3500 and GMC Savana 1500, 2500, 3500

Common Issues Addressed by This Fan Clutch

• Overheating due to worn or failing fan clutch engagement
• Reduced engine cooling efficiency in heavy-duty driving conditions
• Excessive fan noise caused by slipping or damaged clutch
• Premature engine wear from inadequate temperature regulation
• Failure to maintain proper fan speed under varying engine loads

Installation Notes and Tips

Installation requires removal of the existing fan clutch and proper alignment of the four mounting bolts with M10 x 1.5 threads. The hex mounting type facilitates secure fastening. Note that mounting hardware is not included and should be sourced separately. Ensure the clutch is installed with the correct rotation direction (reverse) to match engine requirements. Verify all bolts are torqued to manufacturer specifications to prevent loosening during operation.

Quality Assurance and Warranty Information

The Four Seasons Fan Clutch 36945 is a new, performance-rated part that meets or exceeds OEM standards for durability and function. Manufactured with heavy-duty aluminum, it is designed to withstand demanding engine cooling conditions. While specific warranty details may vary, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.