Dayco PB1688N Engine Harmonic Balancer

Dayco PB1688N Harmonic Balancer Overview

The Dayco PB1688N is a premium OEM replacement harmonic balancer for select GM full-size and luxury applications. Built with a neutral counterweight balance and a cast iron outer ring, it is engineered for engines that use a 6-groove serpentine drive and a single integrated pulley.

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine vibration control and OE-style dimensions for service replacement. For drivers searching for a harmonic balancer for a 2006-2011 Buick Lucerne or a replacement balancer for Cadillac DTS, DeVille, Seville, Eldorado, or Oldsmobile Aurora applications, PB1688N provides the specified fitment and pulley configuration.

Key Features

• Part number: PB1688N
• Premium OEM Replacement Balancer line from Dayco
• Neutral balance with no counterweight
• Cast iron outer ring for durable engine service
• Single integrated serpentine pulley with 6 grooves
• Overall outside diameter: 185.50 mm / 7.304 in.
• Overall width: 42.60 mm / 1.678 in.
• Crank bore: 34.85 mm / 1.373 in.
• Nose outside diameter: 52.40 mm / 2.063 in.
• No timing marks, trigger plate, hardware, or woodruff key included

Detailed Description

The Dayco PB1688N harmonic balancer is built for engines that require a neutral-balance crankshaft damper with a serpentine pulley layout. Its cast iron outer ring and OE-style dimensions support proper accessory drive alignment while helping control crankshaft vibration in the applications listed below. This part number is a direct service option for 2006-2011 Buick Lucerne, 2006-2011 Cadillac DTS, 2000-2005 Cadillac DeVille, 2004-2005 Pontiac Bonneville, 2000-2004 Cadillac Seville, 2001-2003 Oldsmobile Aurora, and 2000-2002 Cadillac Eldorado.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What This Part Helps Address

• Crankshaft vibration from a worn or damaged harmonic balancer
• Serpentine belt drive issues caused by pulley wear or misalignment
• Noise from a deteriorated balancer ring or hub assembly
• Accessory drive instability on GM V8 applications with a 6-groove pulley
• Service replacement needs for OE-style engine vibration control

Installation Notes and Tips

Verify crank bore, nose diameter, pulley groove count, and overall width before installation. This balancer does not include hardware, installation instructions, timing marks, a crank trigger/exciter plate, or a woodruff key, so reuse or source the correct engine-specific components as required. Confirm the engine is neutral balance and match the part to the exact vehicle application before assembly.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built to match OE-style fitment and dimensional requirements for service replacement. PB1688N is specified for the listed Buick, Cadillac, Pontiac, and Oldsmobile applications and is intended to meet the configuration requirements shown in the product data.

• Fits 2006-2011 Buick Lucerne, N/A
• Fits 2006-2011 Cadillac DTS, N/A
• Fits 2000-2005 Cadillac DeVille, N/A
• Fits 2004-2005 Pontiac Bonneville, N/A
• Fits 2000-2004 Cadillac Seville, N/A
• Fits 2001-2003 Oldsmobile Aurora, N/A
• Fits 2000-2002 Cadillac Eldorado, N/A