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On average, the cost for a Subaru WRX STI Crankshaft Harmonic Balancer Replacement is $279 with $139 for parts and $140 for labor. Prices may vary depending on your location.
| Car | Service | Estimate | Shop/Dealer Price |
|---|---|---|---|
| 2017 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$459.02 | Shop/Dealer Price$538.63 - $769.34 |
| 2015 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$450.01 | Shop/Dealer Price$527.85 - $757.24 |
| 2018 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$423.97 | Shop/Dealer Price$495.32 - $705.20 |
| 2014 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$450.01 | Shop/Dealer Price$527.87 - $757.28 |
| 2013 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$450.01 | Shop/Dealer Price$529.35 - $759.86 |
| 2016 Subaru WRX STIH4-2.5L Turbo | Service typeCrankshaft Harmonic Balancer Replacement | Estimate$450.01 | Shop/Dealer Price$528.01 - $757.53 |
The harmonic balancer (also called “crank pulley damper”), connected to the crankshaft of an engine, reduces engine vibration and serves as a pulley for the drive belts. The balancer or “damper” is composed of two elements: a mass and an energy-dissipating element. The mass resists the acceleration of the vibration and the energy dissipating (rubber) element absorbs the vibrations. When the balancer fails, it is usually due to heat, salt, and or ozone deterioration of the rubber. General wear, tear, and stress on the rubber is also a factor.
Usually a problem with the harmonic balancer means that it needs to be replaced. However, sometimes the rubber insert that sits between the center and the outside of the pulley is all that is damaged. It is also possible for the bolt that holds the balancer in place to become loose, which can cause problems even if the pulley isn’t damaged.
Harmonic balancers aren’t a part of most standard inspections, so keep your eye out for warning signs. If you notice excess vibration or noise from the engine, then your balancer may be damaged, and you need to schedule an inspection.
The crankshaft harmonic balancer is connected to the crankshaft, and absorbs many of the vibrations that the engine creates. The engine creates a large amount of force that is delivered to the crankshaft, which transfers the power to the transmission. The harmonic balancer is responsible for absorbing some of the engine-created force so that the crankshaft doesn’t receive it all. When the harmonic balancer fails, the crankshaft receives all of the engine’s vibrations, and is susceptible to serious damage.
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