Harmonic Balancer Sleeve
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National Harmonic Balancer Sleeve

Part No. 88187 Warranty Details  
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Designed to provide enhanced endurance and maximum contamination exclusion while ensuring proper fit, form and function.
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Flange Outer Diameter:2.203 in
Installation Depth:1 in
Maximum Shaft Diameter:1.878 in
Minimum Shaft Diameter:1.872 in
Outside Diameter:2.203
Overall Width:0.688 in

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1 Question | 1 Answer
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  • Q:

    I have a 2003 Mustang that the Front seal has worn a couple deep grooves in the harmonic balancer. I am looking at the harmonic balancer sleeve PN:88187, I assume this is to repair these grooves, How do you install it?
    Asked on 6/15/2013 by Hop2 from Williston, Fl

    1 answer



      Yes, the National Harmonic Balancer Sleeve - Part No. 88187 is the correct part for your 2003 Ford Mustang's harmonic balancer shaft. The cup like part in the product image is the installer tool and the hollow part is the sleeve. The flange end of the sleeve goes on the shaft first. Then, place the installation tool over the sleeve. Gently tap the center of the installation tool until the sleeve covers the worn shaft surface. If the installation tool is too short, a length of pipe or tubing with a squared-off, burr-free end can be used. Be sure that the inside diameter of the pipe is the same as that of the installation tool. Use care not to scratch the precision ground sleeve’s outside diameter. For any further assistance please feel free to call us at: 1-877-238-2623 or visit the nearest Advance Auto Parts store and one of our Parts Pros will gladly assist you with any questions or concerns you may have.

      Answered on 6/16/2013 by John the Car-Doc from AAP
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