Dayco PB1201N Engine Harmonic Balancer

Premium OEM Replacement Balancer

Dayco PB1201N is a premium OEM replacement engine harmonic balancer for classic Chevrolet and GMC trucks and SUVs. It is built for neutral balance applications and includes timing marks for accurate engine service on compatible V8 setups.

Key Features

• Brand: Dayco Premium OEM Replacement Balancer
• Part number: PB1201N
• Engine harmonic balancer with neutral, no-counterweight balance
• Grey iron outer ring material for durable construction
• Overall outside diameter: 7.993 in. (203.00 mm)
• Overall width: 2.343 in. (59.50 mm)
• Ring width: 1.663 in. (42.24 mm)
• Crank bore: 1.245 in. (31.60 mm)
• Nose outside diameter: 1.763 in. (44.78 mm)
• Timing marks included
• 3 bolt holes; no integrated pulleys

Product Details

Dayco PB1201N is a direct-fit style harmonic balancer for a wide range of Chevrolet and GMC applications, including Chevrolet C10, K10, K5 Blazer, Camaro, Impala, Malibu, and GMC Jimmy, C1500, K1500, and P-series models. This engine harmonic balancer is intended for neutral-balance engines and uses a grey iron outer ring to support consistent crankshaft damping in service. This part cross-references ATP 102036 and Dorman 594-006 for the same application.

What It Helps Fix

• Crankshaft vibration at idle or under load
• Timing mark visibility issues during ignition or engine service
• Worn or deteriorated balancer rubber and ring separation concerns
• Noise traced to a failing front engine damper
• Restoration needs for Chevrolet C10, K10, and GMC Jimmy engine builds

Installation Notes

Verify crank bore, nose diameter, and balance type before installation. PB1201N does not include hardware, installation instructions, a crank trigger/exciter plate, or a woodruff key. Confirm timing mark orientation and pulley alignment during assembly, especially on 1977-1986 Chevrolet C10 and K10 trucks, 1979-1986 GMC C1500 and K1500 models, and 1980-1981 Chevrolet Camaro applications.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built as an OE-style service part for applications that require factory-fit dimensions and neutral balance. PB1201N is specified with timing marks and dimensional details to support accurate replacement on listed Chevrolet and GMC vehicles.