Lyc. O-360 cylinder question

Newps wrote:


Mike Spera wrote:

Overhauling cylinders is a crap shoot, even more than new ones. Think
about this, if even ONE goes bad, your economics are shot. The delta
between new and overhauled cylinders is not big enough.


I don't know what your prices are but here an overhauled chromed
O-470/520/550 cylinder is $350 vs a new cost of approx $1100.

Newps,

I suspect you are comparing an overhauled "stud assembly" vs. a new
"complete assembly". Hardly "apples to apples".

Happy Flying!
Scott Skylane
N92054

zatatime wrote in message . ..
On 23 Nov 2004 20:12:17 -0800, (JB) wrote:
first run cylinders with 1660 hrs, and the engine was running great
when removed;

Can I ask why your overhauling a good engine so early?

There's a couple of reasons really... first is that the engine had a
prop strike some 50 hrs ago. oops. Renter pilot took off with the
gear handle up; left gear started to retracted and bent the tips of
the blades. Then the moron proceded to his destination 50 miles away,
complete with bent tips; double oops. No sudden stoppage.

A mechanic checked the runout on the flange and the accessory case
gears and pronounced it fit to fly, which it did for another 50 hours.
The instructors flying it said the engines ran great, very strong and
used little oil. Then came a gear collapse on landing... luckily my
engine was feathered at the time, blades horizontal, no damage to the
engine/prop at all. So there's why the ship was parted out.

I figure that if I'm building a shiny new RV-8, I ought to have a
newly overhauled engine up front. I originally thought about just
bolting it on and flying it, but I decided to have it torn down and
checked out, especially the crankshaft, just for my peace of mind.

John

On 25 Nov 2004 19:37:59 -0800, (JB) wrote:

I decided to have it torn down and
checked out, especially the crankshaft, just for my peace of mind.


Thanks for the response. Seems like the engine has and will see
better days. Not a bad decision, especially if its going to be used
in a slippery single.

Good Luck.
z

JB wrote:

Well there's my answer... no -R on the serial, it's a factory o/h
then. I'm still thinking about what to do with the jugs; I know the
prices of new ones have come down quite a bit, with jugs from ECI and
Superior going for around $900-1100 or so, but still... if these are
first run cylinders with 1660 hrs, and the engine was running great
when removed; there's probably lotsa life left in 'em after an
overhaul, and I'd get to save several hundred bucks per jug.

According to their ads, Lycoming replaces the cylinders with new when they
overhaul an engine.

George Patterson