ATP Parts 102058 Engine Harmonic Balancer

OE Replacement Harmonic Balancer for GM V8 Applications

ATP Parts 102058 is an OE Replacement Balancer built to restore crankshaft vibration control and belt alignment in select GM performance applications. It matches the original fit and function for vehicles that use a double serpentine drive, including the Pontiac GTO, Chevrolet Camaro, and Pontiac Firebird.

The ATP Parts OE Replacement Balancer line focuses on direct-fit engine components that return the rotating assembly to normal operation. Part number 102058 is a standard replacement harmonic balancer for engines that require a 7.0625-inch outside diameter unit with a 3.625-inch depth and serpentine belt grooves.

• Standard replacement harmonic balancer for crankshaft vibration damping
• Inside diameter: 1.375 in. / 35 mm
• Outside diameter: 7.0625 in. / 179 mm / 187 mm
• Depth: 3.625 in. / 92.5 mm
• Serpentine drive belt type
• Groove layout for double serpentine applications
• OE-style fit and function for direct replacement service
• Part number: 102058

This harmonic balancer uses a hub, damping layer, and outer metal pulley section to absorb crankshaft vibration and keep belt tracking aligned. When the damping material deteriorates, the outer ring can shift and create belt misalignment, noise, and added stress on the crankshaft. ATP Parts 102058 restores the original balancer function for 2004-2006 Pontiac GTO, 1998-2002 Chevrolet Camaro, and 1998-2002 Pontiac Firebird applications. This part cross-references Standard Ignition PC1045 for the same application.

Common Problems This Part Can Address

• Crankshaft vibration at idle or under load
• Belt misalignment on serpentine drive systems
• Outer ring movement on a worn balancer
• Squeal or tracking issues from a deteriorated damping layer
• Engine stress caused by a failed harmonic balancer

Installation Notes and Tips

Verify groove count, outside diameter, and depth before installation to confirm the correct OE replacement balancer for your engine. Inspect the crankshaft snout, keyway, and belt alignment surfaces during service, and replace any worn accessory drive components that could affect tracking. Part number 102058 does not include a bolt and washer.

Quality Assurance

ATP Parts OE Replacement Balancer components are built to match original part fit and function for direct replacement service. This helps restore normal engine operation when the original harmonic balancer has failed.

Compatible Vehicles

• Fits 2004-2006 Pontiac GTO, N/A; Groove Qty. 4, 6; Part Type: Double Serpentine; Outer Diameter: 7.52 in
• Fits 1998-2002 Chevrolet Camaro, N/A; Groove Qty. 4, 6; Part Type: Double Serpentine; Outer Diameter: 7.52 in
• Fits 1998-2002 Pontiac Firebird, N/A; Groove Qty. 4, 6; Part Type: Double Serpentine; Outer Diameter: 7.52 in