Dayco PB1147N Engine Harmonic Balancer

Dayco PB1147N Harmonic Balancer

The Dayco PB1147N is a premium OEM replacement harmonic balancer for classic GM V8 applications. It is built with a hub-weighted counterweight balance, cast iron outer ring, and timing marks for accurate engine service and dependable crankshaft damping.

Key Features

• Premium OEM Replacement Balancer from Dayco
• Part number PB1147N for direct reference and ordering
• Hub weighted counterweight balance
• Cast iron outer ring construction
• Timing marks included for service alignment
• Crank bore: 1.499 in. / 38.06 mm
• Nose outside diameter: 1.997 in. / 50.70 mm
• Overall outside diameter: 6.489 in. / 164.80 mm
• Overall width: 3.189 in. / 81.00 mm
• Ring width: 0.997 in. / 25.30 mm
• 4 bolt holes
• No integrated pulleys

Product Details

Dayco PB1147N is engineered as an OEM-style engine harmonic balancer for vehicles that require precise crankshaft vibration control and accurate timing reference. The hub-weighted design and cast iron outer ring support stable operation in applications such as 1965-1977 Oldsmobile Cutlass, 1968-1978 Oldsmobile Delta 88, 1977-1978 Pontiac Bonneville, and 1989-1990 Cadillac Brougham. This part cross-references Dorman 594-117 for the same application.

Vehicle Fitment

• Fits 1989-1990 Cadillac Brougham, N/A
• Fits 1987 Cadillac Brougham, N/A
• Fits 1982-1988 Oldsmobile Cutlass Supreme, N/A
• Fits 1968-1977 Oldsmobile Cutlass Supreme, N/A
• Fits 1986-1987 Buick Regal, N/A
• Fits 1977 Buick Regal, N/A
• Fits 1985-1987 Oldsmobile Cutlass Salon, N/A
• Fits 1975-1977 Oldsmobile Cutlass Salon, N/A
• Fits 1985-1986 Oldsmobile Cutlass, N/A
• Fits 1965-1977 Oldsmobile Cutlass, N/A
• Fits 1982-1984 Oldsmobile Cutlass Calais, N/A
• Fits 1981-1983 Oldsmobile Cutlass Cruiser, N/A
• Fits 1979 Cadillac Eldorado, N/A
• Fits 1977-1979 Pontiac Firebird, N/A
• Fits 1977-1978 Buick LeSabre, N/A
• Fits 1977-1978 Buick Riviera, N/A
• Fits 1976-1978 Cadillac Seville, N/A
• Fits 1968-1978 Oldsmobile 98, N/A
• Fits 1971-1978 Oldsmobile Custom Cruiser, N/A
• Fits 1968-1978 Oldsmobile Delta 88, N/A
• Fits 1968-1978 Oldsmobile Toronado, N/A
• Fits 1977-1978 Pontiac Bonneville, N/A
• Fits 1977-1978 Pontiac Catalina, N/A
• Fits 1977 Buick Century, N/A
• Fits 1977 Buick Skylark, N/A
• Fits 1973-1977 Oldsmobile Omega, N/A
• Fits 1977 Pontiac Grand LeMans, N/A
• Fits 1977 Pontiac Grand Prix, N/A
• Fits 1977 Pontiac Laurentian, N/A
• Fits 1977 Pontiac LeMans, N/A
• Fits 1977 Pontiac Phoenix, N/A

Common Service Uses

• Restoring crankshaft vibration damping on GM V8 engines
• Replacing a worn or damaged harmonic balancer with timing marks
• Addressing belt alignment concerns on engines that use a non-pulley balancer
• Correcting crank bore fitment issues during engine rebuild or repair
• Supporting accurate ignition timing service on Oldsmobile, Buick, Pontiac, and Cadillac applications

Installation Notes

Verify crank bore, nose diameter, overall diameter, and bolt-hole pattern before installation. This balancer does not include hardware, installation instructions, a crank trigger/exciter plate, or a woodruff key. Confirm timing mark orientation and engine application before final assembly.

Quality Assurance

Dayco’s Premium OEM Replacement Balancer line is built for direct-fit replacement use in applications that call for OE-style dimensions and timing reference. The PB1147N is specified with cast iron outer ring construction and hub-weighted balance for consistent service in the listed Cadillac, Buick, Oldsmobile, and Pontiac applications.