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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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 Posted: Mon Nov 24, 2014 5:23 pm Post subject: 582 cylinders? |
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Doing the annual condition inspection on the FSII today and was not real happy with the cylinder walls. They have no stuck metal, they are not scuffed down to the depth of the hone marks, but still - I am not satisfied that they look like they ought to.
Trying to get the camera to look inside and produce decent pictures was about impossible, but the front and rear transfer ports in both cylinders have very similar looking marks above them. Also, these marks are only found above the various transfer ports.
Have a Rotax school certified buddy coming over tomorrow to take a look, meantime I thought I would throw them up for you guys to have a peek and offer some comments.
The pistons look great, rings are free, minimal carbon on the piston top and head underside. Plugs look slightly cool, but otherwise normal.
The owner had an overheat problem back in June, engine power sagged off, he landed and let it sit for a while, started back up and flew home with no problems. Engine has acquired about 10 hours since then with no problems noted. Hmmm....
Am I being too cautious? Or is it time to ship these jugs & pistons off to the shop? Inquiring minds want to know....
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Mon Nov 24, 2014 6:04 pm Post subject: 582 cylinders? |
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Richard, Any indication of piston slap when the engine is cold? I don't see anything that looks terrible, but that overheat makes my forehead wrinkle a bit. If you pull the cylinders your buddy should know the proper place to mic the piston to check for wear on the skirts. My best guess is that overheat was on the way to a seizure and a very tiny bit of metal was transferred and then scrubbed off when the engine was restarted after cooling. Mic'ing the pistons should tell you that.One of the best webinars that the EAA ever did was on reading Rotax piston and cylinder marks. You might want to look it up on Oshkosh 365 and review it.
Rick Girard
On Mon, Nov 24, 2014 at 7:23 PM, Richard Pike <thegreybaron(at)charter.net (thegreybaron(at)charter.net)> wrote:
| Quote: | --> Kolb-List message posted by: "Richard Pike" <thegreybaron(at)charter.net (thegreybaron(at)charter.net)>
Doing the annual condition inspection on the FSII today and was not real happy with the cylinder walls. They have no stuck metal, they are not scuffed down to the depth of the hone marks, but still - I am not satisfied that they look like they ought to.
Trying to get the camera to look inside and produce decent pictures was about impossible, but the front and rear transfer ports in both cylinders have very similar looking marks above them. Also, these marks are only found above the various transfer ports.
Have a Rotax school certified buddy coming over tomorrow to take a look, meantime I thought I would throw them up for you guys to have a peek and offer some comments.
The pistons look great, rings are free, minimal carbon on the piston top and head underside. Plugs look slightly cool, but otherwise normal.
The owner had an overheat problem back in June, engine power sagged off, he landed and let it sit for a while, started back up and flew home with no problems. Engine has acquired about 10 hours since then with no problems noted. Hmmm....
Am I being too cautious? Or is it time to ship these jugs & pistons off to the shop? Inquiring minds want to know....
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
My soul shall be joyful in the LORD; It shall rejoice in His salvation. Psalm 35:9
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Mon Nov 24, 2014 8:57 pm Post subject: 582 cylinders? |
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Richard:
That looks like a lot of scuffing in the photo.
I wouldn't fly it until it was rebuilt. My butt is worth more than an
overhaul.
The engine should have been looked at after the seizure, mild or not, before
it was flown. I think he is lucky it didn't seize on him during the last 10
hours of flight.
My own personal opinion.
john h
Titus, Alabama
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John Hauck
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