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Old 10-02-2013, 03:25 AM   #5
Jamesp
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Join Date: Mar 2013
Location: Houston
Posts: 1,659
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Not the way I modified the IMS shaft. I put several videos on YouTube yesterday explaining why the IMS bearing fails, and showing how to modify the IMS shaft to prevent pressure from forcing oil through the IMS bearing. I found it very strange that a German engineering company couldn't figure out a ball bearing. Ball bearings are fairly well understood from an engineering application perspective. How is it Porsche got this wrong? Several times at that. Something else had to be at play, and looking at it, the geometry of the IMS tube itself creates pressure which will tend to force the grease out of the bearing and replace it with oil.

Here is a link to the YouTube video that may explain why the grease lubrication gets forced out of the bearing 1 986 IMS Bearing Failure Mode - YouTube If you click on my "channel" you should see the rest of the videos showing the modification of the shaft. Just so you know - this isn't spam or an ad, I put this out there as information to other 986 owners. Happy Boxstering!
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