Dorman W45871 Drum Brake Wheel Cylinder - Front Left

Reliable Drum Brake Wheel Cylinder for Buick, Chevrolet, and Oldsmobile

The Dorman W45871 drum brake wheel cylinder is engineered to restore proper braking function in select Buick, Chevrolet, and Oldsmobile models. Designed with durable cast iron construction and precise dimensions, this wheel cylinder ensures consistent hydraulic pressure for safe and effective braking performance.

• Includes bleeder screw for easy brake system bleeding
• Brake line inlet thread diameter: 0.437 inches
• Brake component inlet thread size: 7/16-20
• Cast iron casting material for strength and durability
• Bore diameter measures 1.063 inches for accurate fit
• Package contains one drum brake wheel cylinder

Durable Construction and Precise Specifications

The Dorman W45871 wheel cylinder features a cast iron body that provides long-lasting resistance to wear and corrosion. Its 1.063-inch bore diameter is designed to match original equipment specifications, ensuring proper hydraulic pressure and brake shoe movement. The included bleeder screw simplifies maintenance by allowing trapped air to be released from the brake lines, improving brake responsiveness. Thread sizes of 0.437 inches for the brake line inlet and 7/16-20 for the brake component inlet ensure compatibility with factory brake lines on compatible vehicles.

Compatible Buick, Chevrolet, and Oldsmobile Models

This drum brake wheel cylinder is compatible with several classic and late-model vehicles, including Buick Cutlass, Chevrolet El Camino, Chevrolet Malibu, and Oldsmobile Skylark. The part number W45871 corresponds specifically to these models, making it a suitable replacement for worn or leaking wheel cylinders in their rear drum brake systems.

Common Brake Issues Addressed

• Leaking brake fluid from the wheel cylinder
• Reduced braking efficiency due to worn or seized pistons
• Spongy brake pedal caused by air in the brake lines
• Uneven brake shoe wear from inconsistent hydraulic pressure
• Brake drag or sticking caused by faulty wheel cylinder operation

Installation Notes and Tips

• Ensure the brake system is fully depressurized before removal
• Use the included bleeder screw to properly bleed air from the brake lines after installation
• Inspect brake shoes and hardware for wear and replace if necessary
• Verify thread sizes to confirm compatibility with existing brake lines
• Follow vehicle-specific service manual instructions for drum brake disassembly and reassembly

Quality Assurance and Warranty

Dorman manufactures the W45871 wheel cylinder to meet or exceed OEM standards for fit, form, and function. The cast iron construction and precise machining contribute to reliable braking performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship to provide confidence in the product's durability and reliability.