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Don’t lose the woodruff key you will need it for reassembly. Note: Most harmonic balancers are kept from rotating on the crankshaft by using a woodruff key.Tighten the center bolt with a ratchet handle or breaker bar until the balancer breaks free. Some vehicles have threaded bolt holes in the balancer that can be used to attach a puller. Using the gear puller, place the hooks in an area that will not easily break, like the lip of the pulley section. Step 4: Remove the harmonic balancer unit. Hold it still while loosening the bolt with a socket and ratchet handle or breaker bar. Remove the harmonic balancer bolt by using the strap wrench to hold the balancer still. Step 3: Remove the harmonic balancer bolt. Note: Use your cell phone to take a picture of the belt routing for future reference.Older vehicles, and some newer ones, require you to loosen a mechanical tensioner. You may need to use an open end wrench or ratchet handle, depending on the design. On many modern vehicles, there is an automatic, spring-loaded belt tensioner that can be rotated to loosen the belt. Step 2: Remove the accessory drive belts. Jack the vehicle up high enough to obtain access to the harmonic balancer, located on the front of the motor and attached to the crankshaft. Note: The style of the gear puller will depend on the design of harmonic balancer. Part 1 of 1: Replacing a harmonic balancer On a typical “V” style engine with rear wheel drive.
#Harmonic balancers how to
For this example, we will discuss how to change a harmonic balancer They do not fail often, but excess engine vibrations and misaligned timing marks are among the symptoms of a bad or failing crankshaft harmonic balancerĪlthough the steps provided below are similar for most engines, there are many different engine designs, so please refer to your vehicle’s factory service manual for detailed instructions on your particular vehicle.
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On many engines, the harmonic balancer is integrated into the crank pulley. The purpose of a harmonic balancer is to dampen the harmonic vibrations that all engines produce.