Dorman 621-584 Engine Cooling Fan Blade

Overview of Dorman Engine Cooling Fan Blade 621-584

The Dorman 621-584 engine cooling fan blade is designed for reliable cooling performance in select BMW models. Engineered with 11 durable plastic blades and a steel hub, this counterclockwise rotation fan blade supports efficient airflow to maintain optimal engine temperature.

• 11 forward align fin plastic blades for effective air movement
• 420 mm blade diameter with 2.5 mm thickness for balanced strength
• Steel hub with 45 mm depth and 150 mm bolt circle diameter
• Maximum operating speed of 3500 RPM with puller airflow type
• Compatible with various BMW models including 3 Series, 5 Series, M3, M5, X5, and Z3

Detailed Product Description

The Dorman 621-584 engine cooling fan blade features a robust steel hub that ensures secure mounting and durability under demanding engine conditions. The 11 plastic blades are designed with a forward align fin profile to optimize airflow in a puller configuration, drawing air through the radiator to aid in engine cooling. With a blade diameter of 420 mm and thickness of 2.5 mm, this fan blade balances airflow efficiency and structural integrity. The fan rotates counterclockwise and is rated for a maximum speed of 3500 RPM, suitable for maintaining proper cooling in BMW vehicles such as the 320i, 325i, 330i, 525i, M3, M5, X5, and Z3 models.

Compatible BMW Models and Applications

This engine cooling fan blade is compatible with a wide range of BMW vehicles, including but not limited to:

• BMW 3 Series: 320i, 323Ci, 323i, 323is, 325Ci, 325i, 325is, 325xi, 328Ci, 328i, 328is, 330Ci, 330i, 330xi
• BMW 5 Series: 525i, 525iT, 528i, 530i, 535i
• BMW 7 Series: 735i, 735iL
• BMW M Series: M3, M5
• BMW X Series: X5
• BMW Z Series: Z3

Common Issues Addressed by This Cooling Fan Blade

• Overheating due to damaged or worn fan blades
• Reduced engine cooling efficiency from cracked or warped blades
• Excessive engine temperature fluctuations during operation
• Noise or vibration caused by imbalanced or broken fan blades
• Failure of the cooling fan assembly affecting radiator airflow

Installation Notes and Tips

Installation of the Dorman 621-584 engine cooling fan blade requires removal of the existing fan blade from the clutch assembly. Note that mounting hardware is not included, so retain original bolts and fasteners or source compatible replacements. Ensure the fan blade is installed with the correct counterclockwise rotation and aligned properly on the 150 mm bolt circle diameter hub. Verify clearance around the fan to prevent contact with other engine components. Professional installation is recommended for proper fitment and function.

Quality Assurance and Warranty

Dorman engine cooling fan blades are manufactured to meet or exceed OEM standards for fit, form, and function. This standard replacement grade part undergoes quality inspections to ensure durability and reliable performance. Warranty coverage details should be confirmed at the time of purchase, as they may vary by distributor or region.