Dayco PB1285N Engine Harmonic Balancer

Dayco PB1285N Harmonic Balancer

The Dayco PB1285N is a premium OEM replacement harmonic balancer for the engine in select Toyota Previa models. Built with a cast iron outer ring and neutral counterweight balance, it is specified for 1991-1997 Toyota Previa applications and includes timing marks for service alignment.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Fits 1991-1997 Toyota Previa, N/A
• Part number PB1285N for direct reference
• Neutral balance design with no counterweight
• Cast iron outer ring for engine service durability
• Timing marks included for setup and inspection
• 3-bolt hole design with 1.294 in. crank bore
• Overall outside diameter: 5.024 in. (127.60 mm)
• Overall width: 3.071 in. (78.00 mm)

Product Details

Dayco PB1285N is an engine harmonic balancer engineered as an OEM-style replacement for the Toyota Previa. The Premium OEM Replacement Balancer line focuses on direct-fit service parts that match the original application requirements, and this unit uses a neutral counterweight balance, a cast iron outer ring, and a 3-bolt hole configuration. The PB1285N also includes timing marks, which supports accurate engine timing checks during maintenance on 1991-1997 Toyota Previa vehicles.

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

Common Problems This Part Can Address

• Crankshaft vibration caused by a worn or damaged harmonic balancer
• Visible cracking or separation in the outer ring
• Timing mark wear that makes engine service harder to verify
• Noise or imbalance from a deteriorated balancer assembly
• Fitment issues when replacing an original Toyota Previa balancer

Installation Notes

Verify crank bore, nose diameter, bolt-hole pattern, and overall dimensions before installation. The PB1285N does not include hardware, installation instructions, a crank trigger/exciter plate, or a woodruff key, so reuse or source the correct service components as needed. Confirm timing mark orientation during installation and follow the vehicle service procedure for the 1991-1997 Toyota Previa.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct replacement service in applications that require OE-style fit and function. The PB1285N is specified for confirmed Toyota Previa fitment and is manufactured with the listed dimensions and materials for accurate engine service.