Dorman 620-638 Engine Cooling Fan Assembly

Overview of Dorman Engine Cooling Fan Assembly 620-638

The Dorman 620-638 engine cooling fan assembly is designed to maintain optimal engine temperature for select Buick, Chevrolet, and Pontiac models. This assembly includes dual plastic fan blades and a durable black plastic shroud to ensure efficient airflow and cooling performance.

• Motor Type: Brushed motor for reliable operation
• Fan Quantity: Dual fan blades for enhanced cooling
• Shroud Included: Yes, made of black plastic for durability
• Blade Material: Plastic blades designed for balanced airflow
• Connector Quantity and Type: Two male connectors for secure electrical connections
• Terminal Quantity: Two terminals for proper wiring
• Package Contents: Complete radiator fan assembly

Detailed Product Description

The Dorman 620-638 engine cooling fan assembly features a brushed motor that drives two plastic fan blades housed within a black plastic shroud. This design helps direct airflow efficiently through the radiator, supporting engine temperature regulation. The assembly includes two male connectors and terminals, ensuring compatibility with the vehicle’s electrical system. The plastic construction of the blades and shroud balances durability with weight reduction, contributing to overall vehicle efficiency.

This cooling fan assembly is compatible with various Buick, Chevrolet, and Pontiac models, including the Buick Allure and LaCrosse, Chevrolet Impala and Monte Carlo, and Pontiac Grand Prix. The part number 620-638 ensures precise fitment and function for these vehicles.

Common Applications and Issues Addressed

• Replaces faulty or worn engine cooling fan assemblies
• Resolves overheating issues caused by inadequate airflow
• Fixes electrical connection problems with proper terminal and connector design
• Restores cooling efficiency in Buick Allure, Chevrolet Impala, and Pontiac Grand Prix models
• Addresses noise or vibration issues from damaged fan blades or shroud

Installation Notes and Tips

• Ensure vehicle compatibility by verifying make, model, and part number 620-638 before installation
• Disconnect the battery before removing the old fan assembly to prevent electrical hazards
• Handle plastic blades and shroud carefully to avoid damage during installation
• Check electrical connectors for corrosion or damage and clean if necessary
• Secure all mounting points firmly to prevent vibration and noise

Quality Assurance and Warranty

Dorman engine cooling fan assemblies are manufactured to meet or exceed OEM specifications. The 620-638 part undergoes rigorous quality control to ensure durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Consult product documentation for exact warranty terms.