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Old 07-31-2012, 07:45 PM   #14
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Join Date: Apr 2008
Location: Dallas, TX
Posts: 2,217
My Ride: E30-E46-E90-E90M-F30
I edited the original picture to show the photo captions

What is the main difference between the Pre 2002 and Post 2002 Harmonic Damper?

People been saying that the Post 2002 Harmonic Damper has a different harmonic dampening frequencies than the Pre 2002. However, upon inspecting the Pre and Post 2002 dampers I saw that they both have the same 275-305Hz Freq

The main difference I see is that the post AUG 2002 has the 3 ribbed AC Pulley and the pre AUG 2002 has a 4 ribbed AC Pulley
post AUG 2002 Pulley (3 ribbed) part number is 11-23-7-513-862
Pre AUG 2002 Pulley (4 ribbed) part number is 11-23-1-438-995

Last edited by flashmeow; 07-31-2012 at 07:47 PM.
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