Dayco PB1200N Engine Harmonic Balancer

Dayco PB1200N Premium OEM Replacement Balancer

The Dayco PB1200N is a premium OEM replacement harmonic balancer for a wide range of classic GM V8 applications. It is built with a neutral balance design, a grey iron outer ring, and timing marks for accurate engine service and crankshaft alignment.

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine vibration control for vehicles that need a dependable harmonic balancer replacement without added trigger plates or integrated pulleys. The PB1200N follows that approach with OE-style dimensions and fitment coverage for many Chevrolet, Buick, Pontiac, Cadillac, Oldsmobile, and GMC models.

Key Features

• Neutral balance design with no counterweight
• Grey iron outer ring for durable engine service
• Timing marks included for setup and maintenance
• 3-bolt hole configuration
• No crank trigger/exciter plate and no integrated pulleys
• OE-style dimensions: 6.750 in. overall outside diameter, 2.343 in. overall width
• Crank bore measures 1.245 in. / 31.60 mm
• Nose outside diameter measures 1.763 in. / 44.78 mm

Detailed Description

Dayco PB1200N harmonic balancer replacement is engineered for engines that require a neutral-balance damper with timing marks and a 3-bolt mounting pattern. The grey iron outer ring and OE-style sizing support consistent crankshaft damping in applications such as Chevrolet Camaro, Chevrolet Caprice, Pontiac Firebird, Buick Roadmaster, and GMC C/K truck platforms. This part number, PB1200N, is also cross-referenced to ATP 102069 for the same application.

Compatible vehicle coverage includes many 1977-1993 GM passenger cars and trucks, including Chevrolet El Camino, Monte Carlo, Impala, Nova, C10, K10, K5 Blazer, and GMC Jimmy. For buyers searching for a harmonic balancer for 1977-1992 Chevrolet Camaro, a replacement balancer for 1977-1992 Pontiac Firebird, or a Dayco PB1200N for 1991-1993 Buick Roadmaster, this part matches those fitment needs directly.

What This Part Helps Address

• Crankshaft vibration from a worn or separated balancer
• Timing mark visibility issues during ignition or engine service
• Damaged outer ring material on an aging harmonic damper
• Incorrect balance setup on neutral-balance engine applications
• Fitment problems caused by mismatched bore, width, or bolt pattern

Installation Notes and Tips

Verify crank bore, nose diameter, overall width, and bolt-hole pattern before installation. This balancer does not include hardware, installation instructions, a woodruff key, or a crank trigger/exciter plate. Confirm timing mark orientation and engine balance requirements before final assembly. The PB1200N also cross-references Dorman 594-009 and Pioneer DA-3051.

Quality Assurance

Dayco manufactures this Premium OEM Replacement Balancer as an OE-style service part for direct replacement use. The PB1200N is built to match listed dimensions and fitment coverage for 1977-1993 Chevrolet, Buick, Pontiac, Cadillac, Oldsmobile, and GMC applications.