Four Seasons 36977 Engine Cooling Fan Clutch

Reliable Engine Cooling Fan Clutch for Chevrolet and GMC Vehicles

The Four Seasons Fan Clutch 36977 is designed to provide dependable engine cooling performance for select Chevrolet and GMC models. Engineered with durable aluminum construction, this standard duty fan clutch ensures efficient operation and compatibility with your vehicle's cooling system.

• Constructed from lightweight, corrosion-resistant aluminum
• Standard duty, non-electronic fan clutch with 4 bolt holes for secure mounting
• Compatible with Chevrolet Astro, S10, S10 Blazer, S15, S15 Jimmy, Safari, and GMC Sonoma
• Meets or exceeds OEM specifications for reliable fit and function
• Flange mounting type with M10 x 1.5 threaded bolt holes
• Maximum clutch diameter of 7.2 inches and overall height of 3.8 inches
• Non-thermal and standard thermal clutch type for versatile cooling needs

Four Seasons Fan Clutch Product Line Overview

The Four Seasons Fan Clutch line focuses on delivering engine cooling components that meet OEM standards for fit, form, and function. This product line includes both thermal and non-thermal clutches designed to regulate fan speed based on engine temperature, helping maintain optimal engine operating temperatures. The 36977 model is part of this line, offering a standard duty, flange-mounted fan clutch suitable for various Chevrolet and GMC trucks and SUVs.

Detailed Product Description

The Four Seasons Fan Clutch 36977 features a raw aluminum finish and a flange mounting type with four bolt holes, each threaded M10 x 1.5, ensuring a secure and precise fit. The clutch has a maximum diameter of 7.2 inches and an overall height of 3.8 inches (96.5 mm), with a distance of 2.25 inches from the clutch to the mounting flange. This non-electronic clutch operates with reverse rotation and is designed for standard use, making it suitable for maintaining proper engine cooling in your Chevrolet Astro, S10, S10 Blazer, S15, S15 Jimmy, Safari, or GMC Sonoma. Note that mounting hardware is not included.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating fan engagement
• Reduces unnecessary fan drag to improve fuel efficiency
• Eliminates noisy or failing fan clutch symptoms
• Restores proper cooling system function in Chevrolet and GMC trucks
• Replaces worn or damaged fan clutches to maintain engine performance

Installation Notes and Tips

Ensure the mounting surface is clean and free of debris before installation. Use the correct M10 x 1.5 bolts (not included) to secure the fan clutch to the flange mount. Verify the clutch rotation direction matches your vehicle’s specifications (reverse rotation). It is recommended to inspect the fan blades and surrounding components during installation to ensure proper alignment and clearance.

Quality Assurance and Warranty

This Four Seasons Fan Clutch 36977 is a new, performance-rated part that meets or exceeds OEM standards for durability and reliability. Manufactured with precision aluminum components, it is designed to provide consistent cooling performance. While specific warranty details are not provided, Four Seasons products typically come with a limited warranty covering defects in materials and workmanship.