"Brian D. Cain" wrote:
 >
 > While we've been on the subject of general engine reliability

lately

 > (especially
 > with the o-ring thread a week or two back), I've been thinking

alot about

 > the
 > corner seal rubber insert "problem".  Just three weeks back when

I was in

 > sunny Lancaster, CA rebuilding a 4-port 13BT for a comrade of

mine, I

 > noticed
 > yet again that the rubber inserts on all 12 corner seals were

turned into

 > mush.

The engine builder likes the rubber plug style. I use only the solid

style. I

have cracked one of the plug types and had one turn back into powdered

iron.

I have never lost a solid one. You stomp on the thin ice long enough,

you get

wet.
Lynn E. Hanover

I have heard of that happening. John at Mazdatrix mentioned they
were have trouble with those things. As I said somebody ought
to try replacing the whole works with a slotted teflon cylinder.

Paul Lamar

-------------------------
Leon Promet sent us a note about a year ago saying that we should
replace the corner seals (the whole plug, not just the rubber piece)
when we rebuild an aircraft engine.  I didn't understand why but thought
I would take the advice - now I am beginning to see why!  Leon also
suggested replacing the stationary gears, especially in 1988 and earlier
engines.  The 1988 and earlier engines used stationary gears that were
not hardened.  Also use the corner seal springs from the 1993 and later
engines.

Ken Powell

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