Dayco PB1347N Engine Harmonic Balancer

Dayco Premium OEM Replacement Balancer PB1347N

The Dayco PB1347N is a premium OEM replacement harmonic balancer for select Mazda applications. Built with a cast iron outer ring, neutral balance, and dual integrated serpentine pulleys, it supports crankshaft damping and accessory drive operation in one assembly.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Part number PB1347N for direct reference
• Neutral balance design with no counterweight
• Cast iron outer ring for durable construction
• Two integrated serpentine pulleys
• Timing marks included for service alignment
• 4-bolt hole configuration
• Crank bore: 1.497 in. / 38.00 mm
• Overall outside diameter: 5.867 in. / 149.00 mm
• Overall width: 1.489 in. / 37.80 mm

Product Details

Dayco’s Premium OEM Replacement Balancer line focuses on direct-fit engine components built to match original equipment dimensions and function. The PB1347N harmonic balancer is specified for Mazda Miata and Mazda Protege applications, including 1995-2005 Mazda Miata, 1994 Mazda Miata from engine serial number 209446, and 1995-2003 Mazda Protege. This part number PB1347N is also cross-referenced to Dorman 594-380 and Pioneer DA-1606 for the same application.

Compatible With 1995-2005 Mazda Miata, N/A; 1994 Mazda Miata, N/A from engine serial number 209446; and 1995-2003 Mazda Protege, N/A. The dual 4-groove serpentine pulley layout, timing marks, and neutral balance configuration make this a practical replacement when restoring crankshaft vibration control and belt drive alignment on these Mazda engines.

Common Uses

• Replacing a worn or damaged harmonic balancer on a Mazda Miata
• Restoring belt alignment on a Mazda Protege engine
• Addressing timing mark visibility during service work
• Correcting vibration caused by a deteriorated crankshaft damper
• Replacing a balancer with pulley wear or ring damage

Installation Notes

Verify crank bore, bolt hole count, pulley layout, and timing mark placement before installation. This balancer does not include hardware, installation instructions, or a woodruff key. Confirm engine serial number fitment for the 1994 Mazda Miata application before ordering, and inspect the accessory drive system for wear that could affect pulley alignment.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built as an OE-style service part for direct replacement use. The PB1347N is engineered to match the listed dimensions and fitment requirements for the specified Mazda applications.