Quote:
Originally Posted by tomcomet
So you are telling me this kind of thing can"go away"...?
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Yes. The key word here is *MINOR*.
Option 1 is that there's minor pitting on the cylinder walls it can be scraped off by the rings with no ill effect. (This is more likely if you pull the plugs, pre-oil the engine and turn it over by hand until your arms and back ache.)
Option 2 is that the cylinders need to be be rehoned but not overbored and you reuse all the parts.
Option 3 is that the cylinders need to be overbored and you essentially require a top overhaul.
Option 4 is that the engines are severely corroded internally and you need complete overhauls.
Do you have detailed borescope pictures of each cylinder?
Edit: That's why I asked you which airplane it is...we're a very small community and somebody is probably familiar with it.