Dayco PB1056ST Engine Harmonic Balancer

Overview of Dayco Street Performance Balancer PB1056ST

The Dayco Street Performance Balancer PB1056ST is engineered for reliable engine harmonic balancing in select Buick, Oldsmobile, and Pontiac models. Designed with precision, this engine harmonic balancer supports smooth engine operation and reduces vibration for vehicles like the Pontiac Firebird and Buick LeSabre.

• Compatible with Buick, Oldsmobile, and Pontiac models including Bonneville, Catalina, Firebird, Grand Prix, and more
• Neutral counterweight balance with no additional counterweights
• Cast iron outer ring for durability and consistent performance
• Four bolt hole configuration for secure mounting
• Includes timing marks for accurate engine timing adjustments
• Crank bore diameter of 1.375 inches (34.90 mm) and nose outside diameter of 1.869 inches (47.46 mm)
• Overall outside diameter of 6.752 inches (171.50 mm) and width of 3.249 inches (82.50 mm)

Detailed Product Description

The Dayco PB1056ST engine harmonic balancer is a critical component designed to reduce torsional vibration in the crankshaft of compatible Buick, Oldsmobile, and Pontiac vehicles. Featuring a neutral counterweight balance, this balancer does not add extra counterweights, maintaining the original engine balance specifications. The cast iron outer ring provides strength and wear resistance, ensuring long-term durability under typical street performance conditions.

This balancer has a four-bolt hole pattern and includes timing marks to assist with precise engine timing setup. It does not include a crank trigger or exciter plate, hardware, or installation instructions, so professional installation is recommended. The crank bore measures 1.375 inches (34.90 mm), fitting specific crankshaft dimensions for models such as the Pontiac GTO and Oldsmobile Delta 88.

About the Street Performance Balancer Product Line

The Dayco Street Performance Balancer line is designed to meet the demands of street-driven vehicles requiring reliable harmonic balancing without additional counterweights. This product line focuses on maintaining factory balance specifications while providing durable materials like cast iron for the outer ring. The PB1056ST is part of this line, offering a balance solution tailored for classic Buick, Oldsmobile, and Pontiac engines.

Common Applications and Problem Solving

• Reduces crankshaft vibration to prevent premature engine wear
• Maintains engine timing accuracy with integrated timing marks
• Prevents harmonic distortion that can cause engine noise and damage
• Supports smooth operation in Buick LeSabre and Pontiac Firebird engines
• Replaces worn or damaged harmonic balancers in Oldsmobile Grand Prix and other compatible models

Installation Notes and Tips

• Professional installation is recommended due to precise fitment requirements
• Verify crank bore diameter and bolt hole pattern before installation
• Use proper torque specifications for the four-bolt mounting pattern
• Check timing marks alignment during installation for accurate engine timing
• Note that hardware and installation instructions are not included with this part

Quality Assurance and Warranty

Dayco manufactures the PB1056ST harmonic balancer to meet industry standards for durability and performance. The cast iron outer ring and neutral balance design contribute to consistent engine operation. Warranty details should be confirmed with the original equipment provider or distributor, as this product does not include specific warranty information in the provided data.