How to Replace a Harmonic Balancer

Schedule Crankshaft Harmonic Balancer Replacement
Service Area

$136.73 - $1,004.94

Price range for all vehicles
Average rating from 324 customers who received a Crankshaft Harmonic Balancer Replacement.

The purpose of a harmonic balancer is to dampen the harmonic vibrations that all engines produce. On many engines, the harmonic balancer is integrated into the crank pulley. They do not fail often, but excess engine vibrations and misaligned timing marks are among the symptoms of a bad or failing crankshaft harmonic balancer

Although 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. For this example, we will discuss how to change a harmonic balancer on a typical “V” style engine with rear wheel drive.

Part 1 of 1: Replacing a harmonic balancer

Materials Needed

vehicle placed on jack stands

Step 1: Prepare the vehicle. 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.

belt tensioner being rotated to loosen it

Step 2: Remove the accessory drive belts. On many modern vehicles, there is an automatic, spring-loaded belt tensioner that can be rotated to loosen the belt.

You may need to use an open end wrench or ratchet handle, depending on the design. Older vehicles, and some newer ones, require you to loosen a mechanical tensioner.

  • Note: Use your cell phone to take a picture of the belt routing for future reference.

strap wrench used to loosen bolt

Step 3: Remove the harmonic balancer bolt. Remove the harmonic balancer bolt by using the strap wrench to hold the balancer still.

Hold it still while loosening the bolt with a socket and ratchet handle or breaker bar. It will be very tight, so pull hard.

Step 4: Remove the harmonic balancer unit. Using the gear puller, place the hooks in an area that will not easily break, like the lip of the pulley section.

threaded holes

Some vehicles have threaded bolt holes in the balancer that can be used to attach a puller. Tighten the center bolt with a ratchet handle or breaker bar until the balancer breaks free.

woodruff key and slot

  • Note: Most harmonic balancers are kept from rotating on the crankshaft by using a woodruff key. Don’t lose the woodruff key; you will need it for reassembly.

Step 5: Install the new harmonic balancer. Align the woodruff key slot in the new balancer with the woodruff key, and carefully slide the balancer onto the crankshaft.

Make sure the keyway remains in its proper position.Install the center bolt and tighten until the required torque specification is obtained.

Step 6: Install the belts. Rotate or loosen the belt tensioner to reinstall the belt.

  • Note: Refer to your previous photograph or service manual to determine the correct belt routing.

Step 7: Lower and start the vehicle. Carefully remove the jackstands and lower the vehicle, starting the vehicle to ensure proper reassembly.

If you are not comfortable doing the work yourself, have one of YourMechanic’s certified mechanics complete the crankshaft harmonic balancer replacement for you.


Next Step

Schedule Crankshaft Harmonic Balancer Replacement

The most popular service booked by readers of this article is Crankshaft Harmonic Balancer Replacement. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Crankshaft Harmonic Balancer Replacement reviews

Excellent Rating


YourMechanic Crankshaft Harmonic Balancer Replacement Service

Average Rating

4.9/5

Number of Reviews

324

Rating Summary
303
15
2
0
4
303
15
2
0
4

Harold

31 years of experience
52 reviews
Harold
31 years of experience
GMC Terrain - Crankshaft Harmonic Balancer - Jacksonville, Florida
He was the only one who actually solved the issue rather than just continuing to put a bandaid on it, good job.
Buick Century - Crankshaft Harmonic Balancer Replacement - Orange Park, Florida
Harold was friendly, professional and very knowledgeable. He worked quickly and answered any questions we had without hesitation. Really good experience overall and will definitely use his services again!

John

26 years of experience
457 reviews
John
26 years of experience
Toyota Tacoma - Crankshaft Harmonic Balancer - Houston, Texas
John is very personable guy. Let me know everything he was doing to my truck and was very knowledgeable about my vehicle. I will definitely use him again... thanks John!
Mercedes-Benz S320 - Crankshaft Harmonic Balancer Replacement - La Marque, Texas
As usual, John's work was stellar! He was punctual, took great care of my classic vehicle, and I'm back on the road! Thanks John for being an honest, hard-working mechanic that people can genuinely TRUST.

Fred

16 years of experience
351 reviews
Fred
16 years of experience
Acura MDX - Crankshaft Harmonic Balancer - Spring, Texas
So glad I found this company! I was unable to get my car to a mechanic because the power steering went out and a mobile mechanic was my best option. He diagnosed everything and quoted me two options; what I ABSOLUTELY needed to get the car running and another option to get the car into the top notch shape. I picked a date and Fred showed up right on time and explained the process. He was prompt, efficient and extremely affordable for the all the work that I had done! Thanks, Fred, well done.

Diego

20 years of experience
464 reviews
Diego
20 years of experience
Jeep Cherokee - Crankshaft Harmonic Balancer - Buckeye, Arizona
excellent attitude, approachable person. good to know he comes from a family of mechanics. no question I will hire him again.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE