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  #21  
Old 10-16-2018, 11:27 AM
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I decided to pull all three suspect cylinders (2, 4 and 6). They have been sent to a shop. I'll update when I get more info.

@bobnoffs: yes, same shop.
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  #22  
Old 10-16-2018, 01:49 PM
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Also, looking back on my original post, I realized that I may have misrepresented what the mechanic was saying.

My mechanic's suggestion of "just adding oil" was based on oil consumption of qt/3h which was pretty stable over ~3 years. The moment I reported sharply increased oil consumption he suggested checking the cylinders.
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  #23  
Old 10-18-2018, 04:40 PM
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Unfortunately for me, things are not looking good:

Quote:
All cylinders are nickel bore and the cylinder walls are wavy with a ring ridge.

One of the cylinders has a crack in the cylinder head next to the exhaust valve seat.

All three exhaust valves rejected due to excessive wear on the stem.

One intake valve rejected due to pitting on the face.

All exhaust valve guides are worn beyond limits.

One piston is damaged from detonation.
I think I'll ask them to pull the remaining cylinders to check for damage.
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  #24  
Old 10-19-2018, 07:40 AM
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Default Cylinders

I may have missed this but who made the cylinders? ECI, Superior, Lycoming, Continental, etc?
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  #25  
Old 10-19-2018, 05:02 PM
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Lycon, I think, manufactured the high compression pistons and maybe cylinders as well. I am not sure and the documentation is sparse.

At this point I am thinking of just doing a complete overhaul for safety.
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