Dayco PB1174ST Engine Harmonic Balancer

Overview of Dayco Street Performance Balancer PB1174ST

The Dayco Street Performance Balancer PB1174ST is engineered for precision and durability, designed specifically for select Lexus and Toyota models. This engine harmonic balancer helps maintain engine stability and reduce vibrations, ensuring smoother operation for vehicles like the Lexus GS300, IS300, SC300, and Toyota Supra.

• Compatible with Lexus GS300, IS300, SC300, and Toyota Supra
• Part number PB1174ST for accurate identification
• Neutral counterweight balance with no counterweight
• Cast iron outer ring for durability
• Serpentine pulley with 6 grooves and 145 mm outside diameter
• Two bolt holes for secure mounting
• Includes timing marks for precise installation
• Crank bore diameter of 1.377 inches (34.96 mm)
• Overall outside diameter of 150 mm (5.906 inches)
• Overall width of 2.087 inches (53 mm)

Detailed Product Description

The Dayco PB1174ST harmonic balancer is a critical component in the engine assembly, designed to reduce torsional vibration from the crankshaft. Featuring a cast iron outer ring, this balancer offers robust construction to withstand engine stresses. It includes a serpentine pulley with six grooves, measuring 145 mm in diameter, which is compatible with the belt systems on Lexus GS300, IS300, SC300, and Toyota Supra models. The balancer has a neutral counterweight balance, meaning it does not add additional counterweight, which is suitable for maintaining factory engine balance specifications.

With two bolt holes and a crank bore diameter of 1.377 inches (34.96 mm), the PB1174ST ensures a precise fit on the crankshaft. The inclusion of timing marks aids in accurate installation and engine timing adjustments. This part does not include hardware or installation instructions, so professional installation is recommended.

About the Street Performance Balancer Product Line

The Dayco Street Performance Balancer line focuses on delivering reliable harmonic balancers designed for street performance applications. These balancers are engineered to meet OEM specifications while providing durability and consistent performance under typical driving conditions. The PB1174ST is part of this line, offering a balance of quality materials and design features tailored for Lexus and Toyota performance vehicles.

Common Applications and Problem Solving

• Reduces crankshaft vibration to prevent premature engine wear
• Maintains proper belt alignment with integrated serpentine pulley
• Helps prevent engine misfires related to harmonic imbalance
• Supports accurate engine timing with visible timing marks
• Replaces worn or damaged harmonic balancers to restore engine smoothness

Installation Notes and Tips

• Ensure compatibility with Lexus GS300, IS300, SC300, and Toyota Supra models before installation
• Professional installation is recommended due to the absence of included hardware and instructions
• Use proper tools to align timing marks during installation for accurate engine timing
• Verify crank bore and bolt hole specifications match the vehicle’s crankshaft

Quality Assurance and Warranty

Dayco manufactures the PB1174ST harmonic balancer to meet stringent quality standards, using durable cast iron materials and precise engineering. While specific warranty details are not provided, Dayco products typically come with manufacturer-backed warranties covering defects in materials and workmanship. For warranty information, consult the product documentation or contact the manufacturer directly.