Quote:
Originally Posted by feelyx
randy, Anything is possible, and chain pull could cause enough deflection to tear the bearings apart.
Here is my theory on what happened, Porsche placed an order for custom bearings from NSK. NSK then built said bearings, and inadvertantly put the 1 seal on the wrong side and shipped the bearings. Porsche received the bearings and sent them to assembly where the shafts were filled with oil, and the bearings were installed correctly, but with the seal incorrect.(seal on the inside of the shaft) The shaft is then sent to production. Production catches an error as a missing seal, sends it back to assembly. Assembly orders seals from NSK (and here it could go 2 ways, as NSK could of said, or Assembly could of said, "fill bearing with oil and add seal on the outside." So the seal was put on some correct some not so correct and into production it went. The rest is history.
This doesn't explain why the single row, and the 6305 bearing. I have a whole 'nother ufo sighting for that.
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Feelyx - catching back up again. My bearing was easily 1/3 full, I was very surprised at how much oil came out. In your theory above you indicate the bearing was put on the inside, are you saying this happened all the time year after year. I've not seen one pulled yet that didn't have the seal on the inside. It actually seems like it would have been a good idea to have the tube filled and seal only on outside of bearing. If one takes the LN approach Porsche would have been better off not putting the seal on the outside after this mistake...at least it would have been exposed to some oil.