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I'm reading between the lines of Al's posts but it seems that he is emphasizing the importance of leaving the engine as un-touched as possible. I once wrote an article for Light Plane World (EAA's ultralight magazine back in the late 80's) and advocated the same thing after noting that many Rotax failures occurred soon after the owner opened up the engine for maintenance. Decarboning the piston ring grooves was important but many builders were causing more problems than they fixed when they went inside so I recommended some products and procedures that would do the job without opening the engine.
This is the exact reason that I would prefer to not open up my RX-8 engine.
I plan to borescope it and compression test it and inspect it in every way I can without taking it apart. If I don't find anything wrong (or suspect) during these inspections, I plan to run it "un-touched" internally.
There seems to always be something that goes amiss when you disassemble and reassemble an engine. A prime example is the thick front cover gasket versus o-ring problem.
There is a lot to be said for, "If it ain't broke, don't fix it."
Bill Dube'
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