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oguralp

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About oguralp

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    Member

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  • From
    Ann Arbor, MI
  • Porsche Club
    PCA (Porsche Club of America)
  • Present cars
    2000 Boxster S
  • Former cars
    '84 VW GTI
  1. I had a rattle as you described on my 2000 Boxster S and after ruling out any external heat shields I ended up replacing the catalytic converter/header on the passenger side. I cut open the older cat to see what was causing the rattle and it turns out that there are a set of thin gauge steel 'cans' that the actual catalyst material is encased in within the actual converter case. These thin cans are spot welded and eventually those spot welds can fail due to repeated thermal cycling and cause the can pieces to rattle against each other when the cat heats up. Its a super annoying noise and your only options are to replace the whole (expensive) part or to try and cut one open and tack it back together if you are good with a welder. I was able to manage to do this but I had already installed my new header, but I can at tell you that it is possible to do. I recommend not buying a used one cause it may end up doing the same thing eventually. Good luck!
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