Dorman 621-591 Engine Cooling Fan Blade

Overview of the Dorman 621-591 Engine Cooling Fan Blade

The Dorman 621-591 engine cooling fan blade is designed specifically for Ford F-250 Super Duty and F-350 Super Duty trucks. Engineered to maintain optimal engine temperature, this fan blade supports efficient airflow and reliable cooling performance.

• 9 blades with a 625 mm diameter for effective air movement
• Durable metal and plastic blade construction with forward align fin design
• Yellow blade color for easy identification
• Clockwise rotation with a maximum speed of 3000 RPM
• Steel hub with 10 mm depth and 220 mm bolt circle diameter
• Pusher airflow type for enhanced cooling efficiency
• Standard replacement grade for dependable performance
• Mounting hardware not included

Detailed Product Description

The Dorman 621-591 engine cooling fan blade features nine blades measuring 625 mm in diameter, constructed from a combination of metal and plastic materials. The forward align fin blade type is designed to push air efficiently through the radiator, supporting the cooling system of Ford F-250 Super Duty and F-350 Super Duty models. The fan blade rotates clockwise and can operate at speeds up to 3000 RPM, ensuring consistent airflow under demanding engine conditions. The steel hub, with a depth of 10 mm and a bolt circle diameter of 220 mm, provides a secure and stable mounting point. This standard replacement part is engineered to meet OEM specifications, making it a reliable choice for maintaining engine cooling performance.

Compatible Vehicles and Applications

This engine cooling fan blade is compatible with the following Ford models:

• Ford F-250 Super Duty
• Ford F-350 Super Duty

It is designed to replace worn or damaged fan blades that may cause overheating, reduced airflow, or engine cooling inefficiency.

Common Issues Addressed by This Fan Blade

• Overheating due to damaged or warped fan blades
• Reduced engine cooling efficiency from broken or missing blades
• Excessive engine temperature fluctuations
• Noise or vibration caused by imbalanced fan blades
• Failure of the cooling system to maintain proper airflow

Installation Notes and Tips

• Ensure the fan blade rotation matches the clockwise direction specified
• Verify bolt circle diameter of 220 mm for proper fitment
• Check hub depth of 10 mm for compatibility with your vehicle’s fan clutch
• Mounting hardware is not included; reuse existing hardware or acquire appropriate bolts
• Inspect the cooling fan assembly for damage before installation

Quality Assurance and Warranty

The Dorman 621-591 engine cooling fan blade is manufactured to meet standard replacement grade requirements, ensuring reliable performance and durability. While mounting hardware is not included, the fan blade is designed to OEM specifications for Ford F-250 Super Duty and F-350 Super Duty trucks. Please consult Dorman’s warranty policy for specific coverage details.