Denny wrote: Maynard, Yesterday I checked the airplane again and found two cylinders down on compression. One with a definite exhaust leak and one apparently headed that way. So my Son and I decided perhaps a top overhaul is in order. After rereading the history of the engine in the logs I become convinced this is the best way to be sure of what we have. I blame most of these problems on running 100LL. How I wish we had our old 80/87 fuel of yesteryear. Anyway, I hope your repair continues to hold for you and thank you again. Denny-----N93990-----Shawnee,Ks ----------------------------------------------------- Denny: Sorry to hear about your problems. The reasoning behind my doing the repair the way I did was the lack of time on the engine. It only had about 60-65 hours (spread over 8.5 years) SMOH. I am still in a quandary as to why the exhaust valve was leaking. The valve was nice and free in the guide and there did not appear to be any deposits on the valve face. This engine had been fed a steady diet of 100LL but I don't think that was the cause. From the sound of things in your note I think I would opt for a top overhaul also. As far as the lack of 80/87 fuel in your area, have you considered using a blend of 100LL and Auto fuel. I seem to recall reading somewhere that this was a viable alternative to the high lead content in "100 LOW LEAD". Maybe some of you more knowledgeable people out there would care to comment on this. Maynard, N99843 (with about 15 hrs on M.M.repair & fingers crossed)
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