Hi All-
Starting my condition inspection early this year, and since my buddy bought a new borescope we decided to take a look at my jugs
IO-390 with 250 hours (about 100 a year), but it was long term pickled for a little over 12 years before first start. We'll get better pics and I'll share, but Cylinders 3 and 4 show a little pitting. Compressions were great at my last condition inspection (78+ on all) and oil analysis looks good too over the last three reports with numbers all within or below Blackstone's averages. I use a qt every ~15 hours
Any thoughts/advice? I could pull and see if they'd clean up with a bore/hone or run and monitor given compressions, oil analysis and usage.
Cyl 3 pitting
![IPC_2024-02-19.16.52.06.9430.jpg IPC_2024-02-19.16.52.06.9430.jpg](https://vansairforce.net/data/attachments/35/35027-fb6abf3a2e15859b1823345a2ebbdcd9.jpg)
Starting my condition inspection early this year, and since my buddy bought a new borescope we decided to take a look at my jugs
IO-390 with 250 hours (about 100 a year), but it was long term pickled for a little over 12 years before first start. We'll get better pics and I'll share, but Cylinders 3 and 4 show a little pitting. Compressions were great at my last condition inspection (78+ on all) and oil analysis looks good too over the last three reports with numbers all within or below Blackstone's averages. I use a qt every ~15 hours
Any thoughts/advice? I could pull and see if they'd clean up with a bore/hone or run and monitor given compressions, oil analysis and usage.
Cyl 3 pitting
![IPC_2024-02-19.16.52.06.9430.jpg IPC_2024-02-19.16.52.06.9430.jpg](https://vansairforce.net/data/attachments/35/35027-fb6abf3a2e15859b1823345a2ebbdcd9.jpg)