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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
These things can go at 30k or last well past 100k.

General condition appearance is one clue. If it is not leaking it has been re-sealed (check records) or has not had to much in the way of heat cycles.

However, a good PPI with leak down will be a better judge.

Maybe have them pull the lower valve covers for a look. A few of the better Porsche mechanics have developed a sense of the exhaust guide condition by checking for side to side play at the exhaust steem.
Old 05-12-2010, 06:39 AM
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