Harmonic Balancer (Crankshaft Damper)
The harmonic balancer is a pulley on the front of the crankshaft with a rubber or fluid layer that damps torsional vibration.
What is Harmonic Balancer (Crankshaft Damper)?
It usually drives the accessory belt as well. An inner hub and an outer ring are joined by rubber; some dampers use viscous fluid instead. Timing marks are often on it.
How it works
Torsional vibrations twist the crankshaft slightly with each firing pulse; the damper absorbs them before they can build up.
Why it matters for your car
If the rubber separates, the outer ring can slip or wobble, throwing the belt off and shifting timing marks. A failed damper can, over time, contribute to crankshaft damage.
Other terms
- Anti-corrosion Warranty (Perforation Warranty)
- Caster
- Cold-Weather Range Loss
- Diesel Knock (Combustion Knock)
- Diode
- Downforce
- Drive Cycle (OBD Drive Cycle)
- Electric Current (Amperage)
- Event Data Recorder (EDR)
- Exhaust System
- Glass Polish
- High-voltage Service Disconnect
- Jacking Points
- Jump-start
- Locking Differential (Diff Lock)
- Starter Solenoid
- Steering Angle Sensor
- Test Light
- Trailer And Caravan Tyres
- Variable Geometry Turbocharger (VGT)