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Old 10-13-2007, 08:08 PM
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Rainer Rainer is offline
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PCA Member: Given to members who are currently part of PCA and have a valid PCA member ID# in their user profile on this site and have applied for and been admitted to the PCA Members Group on this website via the Group Memberships link in the User Control Panel - Issue reason: Added to PCA Group on 2/12/2008 Index Entry: Award given to someone who enters their Car into the Index complete with Photo! - Issue reason: 2/4/07 Entry Repair & Service: Given to those who have shared exceptional information regarding the repair and/or servicing of the Cayman - Issue reason: Awarded for Hatch Thunk Article! Donations Bronze: Given to someone who has donated at least $50 to the site. - Issue reason: Donation on 10/29/2006 
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Join Date: Jul 2006
Location: Texas
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Quote:
Originally Posted by vision1110 View Post
The one thing that I am having trouble finding is a difinitive answer as to how to stop the clunk or boom.

The dealer performed the weather stripping around the weight fix and I think the booming is worse than the clunk. I will attempt the o-ring fix on my own this weekend and post an update next week.
Vision 1110,
Be aware of the fact that the weight is really a vibration absorber. Its free out-of-phase movement is a prerequisite for its functionality. The more its movement is reduced or even stopped, the more the boom will increase, since the absorber will progressively turn into a stationary mass in the middle of the hatch and start to resonate in-phase with the hatch vibrations.
If your dealer did the mod without understanding the concept of an absorber, please check if the used foam strips are too thick and rub against the metal cutout surrounding the weight. This would block its free up-and-down movement - exactly what you don't want. You want the foam to just dampen any impact against the hatch at the limits of the weight's suspension travel.
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