Cylinder #1 in my Mattituck Lycoming IO-360, 400 hrs since new, built in 2009
Symptoms were low compression (low 60s, came up to 74 after staking the exhaust valve). I get very dirty oil within a few hours. Oil burn is a quart every 3-5 hours.
You can see a scuff on the cylinder wall, Savvy says it looks like it had a stuck wrist pin. There's also the wide dark vertical lines, evenly spaced that I can't identify, but they are not showing in any of the other cylinders.
Video - Cyl #1: https://youtu.be/282Tuh9oENc
Here's a video of cyl #2 for comparison. 3 & 4 look the same as 2. Compression was 78 on all 3.
Video - Cyl #2: https://youtu.be/4nLdtXPAEI8
Savvy recommends just monitoring it, but they always advise not removing the cylinder. I have zero issues buying a new cylinder, if that's what this needs. Engine seems to run just fine other than the dirty oil.
Symptoms were low compression (low 60s, came up to 74 after staking the exhaust valve). I get very dirty oil within a few hours. Oil burn is a quart every 3-5 hours.
You can see a scuff on the cylinder wall, Savvy says it looks like it had a stuck wrist pin. There's also the wide dark vertical lines, evenly spaced that I can't identify, but they are not showing in any of the other cylinders.
Video - Cyl #1: https://youtu.be/282Tuh9oENc
Here's a video of cyl #2 for comparison. 3 & 4 look the same as 2. Compression was 78 on all 3.
Video - Cyl #2: https://youtu.be/4nLdtXPAEI8
Savvy recommends just monitoring it, but they always advise not removing the cylinder. I have zero issues buying a new cylinder, if that's what this needs. Engine seems to run just fine other than the dirty oil.