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Old 02-21-2003, 07:10 PM
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Join Date: Mar 2000
Posts: 517
Harmonic Balancer Bolt Removal - '99 E320

Harmonic balancer is failing prematurely and requires renewal.... but the retention bolt fails to budge... using an 1/2" drive impact wrench rated at 600 lbs/ft in reverse failed to budge it.

Any suggestions on how to remove this bolt?
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Old 02-21-2003, 07:17 PM
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Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
Get a 1/2" drive socket that fits the bolt (I believe this is a 17mm Allen head) and the longest breaker bar you can come up with, then use a pipe over the breaker bar. You'll need the tool to counterhold the balancer, the one that engages into the balancer spokes (webbing). In extreme cases you may need to use a torque multiplier.

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Old 02-21-2003, 09:48 PM
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Join Date: Jan 2000
Location: Carol Stream, Il, USA
Posts: 605
I used the breaker bar method, except that the breaker bar was pointing downward. I placed my feet on the breaker bar and with my hands on the car frame I broke it free with my legs - It saved my back. The bolt is on very tight, I used blue thread locker on the threads when putting the bolt back on since the original bolt had blue thread locker on it.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles
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Old 03-18-2003, 12:23 AM
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Join Date: Mar 2000
Posts: 517
Used crank holding tool (Baum Tools, < $100) and 1/2" drive 17 mm Allen head, both equipped with breaker bars... bolt moved immediately. Renewal of pulley took less than 15 minutes.
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