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Lycoming O-290-D options



 
 
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  #1  
Old March 9th 04, 05:47 PM
Gene Z. Ragan
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Default Lycoming O-290-D options

Hi,

I am in the process of restoring a Pazmany PL-1. It has an O-290-D
with about 1800 hours on it.
The original logs go back to 1951 and the engine has never been
overhauled. At some point in the
60s some top end work was done but the exact nature is not listed.
The engine technically has 200 hours left before TBO but one cylinder
is at 60 compression and the thought of flying it as is scares me.

Parts seems to be scarce for this engine, but they can be found. I
could embark on an adventure and get guidance from an A&P and attempt
a rebuild. I could find someone to do a rebuild or I could sell
the runout engine and put a O-320 in, which seems to have a stable
parts supply.

Could I get some advice from the group?

Thanks!

Gene
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  #3  
Old March 9th 04, 07:38 PM
RU ok
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Default



I am in the process of restoring a Pazmany PL-1. It has an O-290-D
with about 1800 hours on it.
The original logs go back to 1951 and the engine has never been
overhauled. At some point in the
60s some top end work was done but the exact nature is not listed.
The engine technically has 200 hours left before TBO but one cylinder
is at 60 compression and the thought of flying it as is scares me.

Parts seems to be scarce for this engine, but they can be found. I
could embark on an adventure and get guidance from an A&P and attempt
a rebuild. I could find someone to do a rebuild or I could sell
the runout engine and put a O-320 in, which seems to have a stable
parts supply.

Could I get some advice from the group?

Thanks!

Gene

++++++++++++++++++++++++++++++

Parts are available, but pricey.
Weight is close to an 0-320.

Depending on your circumstances, you might find an
0-320 to be a cheaper and more powerful replacement.


Barnyard BOb -



  #4  
Old March 10th 04, 06:29 AM
Gene Z. Ragan
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David and all,

Thanks for the good input.

I have rebuilt several engines including performance racing Porsche
engines, but I know that doesn't make me an expert aviation powerplant
mechanic. I did expect it to be an adventure for sure.

Because the engine is an O-290-D, I wasn't aware that ECI had new
cyclinders for it. I will yank the sad jug and see what is going on
inside.

I expect whatever I do to be expensive, I was just trying to deterine
what to do with the 300 lbs of metal bolted to the plane right now.
Perhaps I can find a midtime 320 and let an excited 290 owner buy this
one for parts.

Gene
  #7  
Old March 11th 04, 10:17 AM
David O
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Default

Richard Lamb wrote:


If I'm not mistaken, the O-290 has a solid crank.
Not hollow like the O-320?

Richard


I'm pretty sure that all Lyc O-235, O-290, and O-320 engines have
hollow crankshafts. Some Lyc O-360 engines have solid cranks. The
original "corrosion pits" AD proposal included all O-235, O-290, and
O-320 engines plus the O-360 engines with hollow cranks. After
lobbying by AOPA and others, the scope of the AD was reduced to
include fewer engine models. Lycoming's crankshaft inspection SB
(505, 505A, 505B) never included O-235 or O-290 engines. Lycoming's
protective coating SB (530, 530A) includes all O-235, O-290, and O-320
engines plus the O-360 engines with hollow cranks.

David O -- http://www.AirplaneZone.com



 




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