Dayco PB1084ST Engine Harmonic Balancer

Dayco Street Performance Balancer PB1084ST

The Dayco PB1084ST is a street performance harmonic balancer built for Ford and Lincoln V8 applications that need stable crankshaft damping and accurate timing reference. It features a ring-weighted design, cast iron outer ring, and timing marks for service-friendly setup.

Street Performance Balancer Features

• Part number PB1084ST from Dayco’s Street Performance Balancer line
• Ring weighted counterweight balance for crankshaft vibration control
• Cast iron outer ring for durable street performance use
• Timing marks included for ignition and engine service checks
• Crank bore measures 1.374 in. / 34.89 mm
• Overall outside diameter measures 6.359 in. / 161.50 mm
• Overall width measures 4.134 in. / 105.00 mm
• Nose outside diameter measures 1.878 in. / 47.70 mm
• Four bolt holes, no integrated pulleys, no crank trigger/exciter plate

Detailed Description

Dayco’s Street Performance Balancer line is aimed at engines that need a dependable harmonic balancer with straightforward service features and OE-style fitment dimensions. The PB1084ST uses a ring-weighted configuration and cast iron outer ring to help manage crankshaft harmonics while keeping timing marks visible for tune-up work. This makes it a practical choice for classic Ford and Lincoln applications where correct balancer dimensions matter.

Compatible With 1981-1995 Ford Bronco, 1981-1995 Ford E-Series vans, 1981-1995 Ford F-Series trucks, 1982-1995 Ford Mustang, 1981-1991 Ford LTD, 1981-1993 Ford Thunderbird, 1982-1992 Mercury Capri, 1982-1993 Mercury Cougar, and 1982-1991 Mercury Grand Marquis. This part number, PB1084ST, also cross-references Dorman 594-024S for the same application.

What It Helps Address

• Engine vibration caused by worn or incorrect harmonic balancer damping
• Timing mark visibility issues during ignition setup or maintenance
• Fitment problems from incorrect crank bore or nose diameter
• Balancer wear on street-driven Ford and Lincoln V8 engines
• Replacement needs for vehicles using a four-bolt balancer pattern

Installation Notes and Tips

Verify crank bore, nose diameter, bolt pattern, and overall dimensions before installation. The PB1084ST does not include hardware, installation instructions, a woodruff key, or a crank trigger/exciter plate. Confirm the vehicle’s application notes, including California and non-California listings, before ordering. For best results, inspect the crank snout, keyway, and mating surfaces during service.

Quality Assurance

Dayco manufactures the PB1084ST as part of its Street Performance Balancer product line with application-specific dimensions and timing marks for service accuracy. The cast iron outer ring and ring-weighted design support consistent operation in street performance use.