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Hi,
This is nothing new, just different, incorrect, verbage. The IMS failure is mainly reserved to the '01 and later cars when Porsche redesigned the Intermediate Shaft to lessen engine vibration. When this was done, they switched to a single bearing (not the seals) over the previous two. The issue persists to this day.
What the lister is describing here is not an IMS failure, but incompetence on the part of the Dealer Mechanics who sheared off the IMS nut by overtightening it - that's something completely different. It's not an inherent failure but poor wrentching on the part of the mechanic.
The non-egas cars are essentially immune to this failure because the IMS in these cars is supported by 2 bearings which hold it on it's spin axis whereas the single bearing has been shown to allow meandering of this shaft which drives the Camshaft Chains. At high revs, this shaft become misshapened and eventually fails, breaks and shreds the Oil Seals. Ironically, usually at low revs.
In other words, Randall, nothing to lose sleep over...
Happy Motoring!... Jim'99
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