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Dan and Brent,
My Lycoming parts catalog for the IO, AIO-360-A, -B series wide cylinder
flange crankcase model engines on page 1-10 (case halves) and on page 6-2
(oil sump assy) calls for part no. STD 160, washer, 1/4 lock, internal teeth
to be used with STD-8 flat washer and the required bolt.  SDT-160
aproximates MS35333(lock washer, carbon steel, cadmium plated).  MS35338
(lock washer, carbon steel, cadmium plated) is the split ring washer.  It
has it's own uses elswhere in the engine.
Properly installed and checked for torque each 100 hours, the Lycoming
engine will not fall apart.  Locktite is optional tho not required.
Between 1994 and 1997 I overhauled to new specs. five Lycoming 0-320H2AD
engines for our fleet of Cessna 172N's.  Most have reached and exceeded TBO
without oil leaks or other failures.  I did re-ring one engine at 300 hours
because the rings would not seat into the chrome barrels.  It now burns no
excessive oil I'm aware of.
It pains me to hear you speak so poorly of the average joe A&P who must be
an attorney and a secretary as well as a mechanic, all for $15.00 per hour
in general aviation.  Get a grip and safety all your bolts!
Walter Dodson 1895740IA

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Please send your photos and drawings to marvkaye@olsusa.com.
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