ATP 102078 Engine Harmonic Balancer

Buyer fitment guide only intended as reference. Please use catalogue search by vehicle to ensure proper fitment.

• Pioneer 872005
• Pioneer DA427
• Pioneer DA-427
• Pioneer DA427HD
• Dorman - OE Solutions 594113
• NAPA 6005268
• Venture Products V1174
• General Motors 3860010
• Dayco PB1211-N
• Hollander 309117
• Pioneer Automotive Industries 872005
• Pioneer Automotive Industries DA427
• Pioneer Automotive Industries DA-427
• Pioneer Automotive Industries DA427HD
• Dayco PB1211N

• The purpose of an harmonic balancer is to absorb crankshaft vibrations. Harmonic balancers are typically constructed in three pieces. The first piece is often called a hub. It bolts to directly to the crankshaft. The hub is surrounded by rubber or fluid which dampens crankshaft vibrations. The outside layer is metal which has grooves on it for the belt. Over time the rubber and/or fluid layer deteriorate causing the outer pulley to shift forward. This causes belt miss alignment and can ultimately result in crankshaft failure. When the harmonic balancer is broken, it must be replaced. ATP Harmonic Balancers fit and function just like the original part restoring the engine to normal operation.