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Oil separator... still leaking! 900 1993

posted by  Brian S on  Mon Jan 12 05:58 CST 2004
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Hi Spook -
No leaks at all at this spot for the first 16 months I owned the car, during which time I did once remove, clean & replace the box. Leaking started ~2 months ago, and has been the same with
+ original box w/ 10-month-old-o-ring
+ original box w/ new o-ring
+ new box w/ new o-ring

You're right about the picture - the inner edge of the larger hole looks rough. That edge is actually machined, but was covered with crud when I took the picture. I cleaned it up nice before reinstalling.

Because I had the same problem with old and new boxes/o-rings, and I doubt the shape of the block suddenly changed, I'm guessing the problem may be with the oil return drain tube, which is made of some kind of flexible rubber or plastic material. Replacing the tube would mean pulling the sump, so I'm looking for another approach to making the tube/box/block seal better...

- Brian






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