Hi Folks,
we own a Christen Eagle with the IO-360-A1A fitted in. It has got the Christen inverted oil system. We have had a look inside the cylinders (see attached Photos). The result of the borescope doesn't look very good and it seems like (for me as a non-expert) we are going to need 4 new cylinders within next 50-100h.
here are some facts about the engine.
- overhauled in 2004 (engine hours set to 0), it has made around 700h since then. We do aerobatics but not too hard.
- Oil change every 25h and oiltype is Aero XPD 100
- always warm up before take off
- cylinderhead temps under 400°F by 90% of operation
- oil temp often above 200°F, in warm weather conditions sometimes as high as 220°F
- oil consumption not unusual
- compression check ok.
- Oil pressure drop in vertical flight or in zero G conditions
Any suggestions about a what caused the cylinders worn?
Any suggestions about a new cylinder kit, which manufacturer?
thanks for your help,
Manuel
we own a Christen Eagle with the IO-360-A1A fitted in. It has got the Christen inverted oil system. We have had a look inside the cylinders (see attached Photos). The result of the borescope doesn't look very good and it seems like (for me as a non-expert) we are going to need 4 new cylinders within next 50-100h.
here are some facts about the engine.
- overhauled in 2004 (engine hours set to 0), it has made around 700h since then. We do aerobatics but not too hard.
- Oil change every 25h and oiltype is Aero XPD 100
- always warm up before take off
- cylinderhead temps under 400°F by 90% of operation
- oil temp often above 200°F, in warm weather conditions sometimes as high as 220°F
- oil consumption not unusual
- compression check ok.
- Oil pressure drop in vertical flight or in zero G conditions
Any suggestions about a what caused the cylinders worn?
Any suggestions about a new cylinder kit, which manufacturer?
thanks for your help,
Manuel
![IV000001.jpg IV000001.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17852-IV000001.jpg)
![IV000002.jpg IV000002.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17853-IV000002.jpg)
![IV000003.jpg IV000003.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17854-IV000003.jpg)
![IV000004.jpg IV000004.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17855-IV000004.jpg)
![IV000005.jpg IV000005.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17856-IV000005.jpg)
![IV000006.jpg IV000006.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17857-IV000006.jpg)
![IV000007.jpg IV000007.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17858-IV000007.jpg)
![IV000008.jpg IV000008.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17859-IV000008.jpg)
![IV000009.jpg IV000009.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17860-IV000009.jpg)
![IV000013.jpg IV000013.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17864-IV000013.jpg)
![IV000014.jpg IV000014.jpg](https://cdn.imagearchive.com/biplaneforum/data/attach/17/17865-IV000014.jpg)
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