328: Wheel caps disappeared! - Ferrari Life
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post #1 of 4 Old 06-07-2004, 03:53 PM Thread Starter
Join Date: Apr 2004
Location: Marietta, GA
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328: Wheel caps disappeared!

When I bought my 328 several months ago, I noticed that the wheel center caps were all cracked, two rather badly.

I bought a replacement set on eBay that were supposedly OEM from Italy, and aside from the fact that they were flat rather than crowned, they seemed like a good match for the originals.

When I installed them (with the O-rings taken off the old caps), the only difference seemed to be that the plastic was a bit softer than the old ones, but the fit tolerances seemed similar.

Well, on my first drive, I stopped along the way to get some keys duplicated, and upon leaving the car, I noticed that 2 of the new caps were missing! When I checked the other 2, one was still good and tight, but the other was very loose, so I removed it and put it in the car. (Fortunately, I still had the old set, so temporarily I put them back on, though minus 2 of the O-rings.)

I should point out that at no time when outside the garage was I out of sight of the car, so the caps were not stolen, they just fell off.

Considering they seemed tight enough when I put them on, what happened here? Is it possible the caps are shrinking (or the wheels expanding) in normal driving? Anyone have any bright ideas?
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post #2 of 4 Old 06-08-2004, 12:25 AM
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Location: San Francisco
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I'm guessing the vibration rattled the caps out. Even if they were tight think about all the vibrations they get when driving etc.
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post #3 of 4 Old 06-08-2004, 02:28 PM
Join Date: Nov 2003
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Slight expansion of the rim may be a possible cause. It is surprising how hot your wheels get (esp in the centre near the hub) after a bit of vigorous driving/braking. Try leaving the handbrake on for a few kms and see what I mean! Maybe the heat softened the plastic a bit, reducing its springiness & "fit". Maybe try a touch of silicone, etc on the cap to hold it?
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post #4 of 4 Old 01-13-2013, 11:52 PM
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Join Date: Dec 2012
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This post is old, yet i think that centrifugal force vs. an "unbalanced" cap, in conjunction with heated rims..
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