Dayco PB1146ST Engine Harmonic Balancer

Overview of Dayco PB1146ST Engine Harmonic Balancer

The Dayco Street Performance Balancer PB1146ST is engineered for reliable performance in select Toyota and Lexus vehicles. Designed to maintain engine balance and reduce vibration, this harmonic balancer supports smooth operation in models like the Toyota 4Runner and Lexus GX470.

• Compatible with Toyota 4Runner, GX470, Land Cruiser, LX470, Sequoia, and Tundra
• Part number PB1146ST for precise identification
• Neutral counterweight balance with no additional counterweights
• Cast iron outer ring for durability
• Includes one integrated serpentine pulley with six grooves
• Overall outside diameter of 6.26 inches (159 mm)
• Timing marks included for accurate engine timing
• Two bolt holes for secure mounting

Detailed Product Features and Specifications

The Dayco PB1146ST harmonic balancer features a neutral counterweight balance, meaning it does not include additional counterweights, which is suitable for engines requiring a balanced setup without extra mass. The crank bore measures 1.379 inches (35.01 mm), ensuring a precise fit on compatible crankshafts. The balancer’s outer ring is constructed from cast iron, providing strength and resistance to wear over time.

This balancer integrates a single serpentine pulley with six grooves, measuring 5.512 inches (140 mm) in diameter, designed to drive accessory belts efficiently. The overall width of the balancer is 2.788 inches (70.80 mm), and the ring width is 1.504 inches (38.18 mm). Additionally, the balancer includes timing marks to assist with accurate ignition timing during installation and maintenance.

About the Street Performance Balancer Product Line

The Dayco Street Performance Balancer line focuses on delivering reliable harmonic balancers tailored for street-driven vehicles. This product line emphasizes durability and precise fitment without added counterweights, making it suitable for performance-oriented applications where engine balance is critical. The PB1146ST is part of this line, offering a balance of strength and functionality for Toyota and Lexus engines.

Applications and Problem Solving

• Reduces engine vibration and noise for smoother operation
• Prevents premature wear on crankshaft and accessory components
• Maintains proper timing with integrated timing marks
• Supports accessory belt alignment with integrated serpentine pulley
• Helps avoid engine damage caused by harmonic imbalance

Installation Notes and Tips

• Ensure crank bore size (1.379 inches) matches engine specifications
• Use proper torque settings on the two bolt holes for secure mounting
• Verify timing marks alignment during installation for accurate ignition timing
• Note that hardware and installation instructions are not included
• Inspect pulley grooves for belt compatibility before installation

Quality Assurance and Warranty

Dayco manufactures the PB1146ST harmonic balancer to meet OEM standards for fit and function. The cast iron construction and precise machining contribute to long service life. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed quality assurance to support reliable performance in Toyota and Lexus vehicles.