On Tue, 8 Feb 2005 15:57:23 -0500, "Peter R."
wrote:

Sigh Nine hours now on the newly rebuilt Continental IO-520 with
Superior Millennium cylinders, and already the primary fuel pump is going
back to the company for repair or replacement. More importantly, oil is
escaping from the #2 and #5 cylinders' push rod tube seals (at the
Continental case end, for those like me who thought it was a cylinder
issue).

My mechanic told me that, in his experience, Continental is known for
problems with these seals.

It's not Continental's fault, it's the way they were installed.
If the seal is actually leaking and the tube is OK, it's more than
likely the edge of the seal (inside or outside) was rolled as it or
the tube was pushed into place.

I had two that were leaking like crazy after a top (soft rings). One
mechanic just couldn't seem to get them right. The Bo specialist at
HTL only took a few minutes to fix them right.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

Anyone have any experience with leaking push rod tube seals?

Granted all of this is covered under warranty, but after three and a half
months down, I wanted nothing more than to fly the wings off this aircraft
now that the engine replacement work has completed.