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As you all know, I decided to do a major overhaul to my C-75. Upon closer examination of the logs, I found that my engine has only 1358 hours SMOH, but looking inside the crankcase, I agree the overhaul is not a bad idea. No controversy here. However, I also realized that the engine is only 328 hours STOH, meaning that the cylinders were overhauled only 328 hours ago. My compressions read consistently good, except for a hissing sound on one of the cylinders. It appears I have 3 choices: 1. To legally call the whole project a major overhaul, I would need to change pistons, rings, exhaust valves, and springs, at an estimated cost of $ 550 per cylinder. All this, perhaps unecessarily. If funds were plentiful (they are not), we would not mind going for this overkill in terms of safety and peace of mind. 2. Do only a "return to service" minimum overhaul on the cylinders, which will cost like $ 300 per cylinder (if they don't find anything bad). However, I could not legally call the project a major overhaul. 3. Do nothing with the cylinders, since they only have 300 hours and compressions are reading good. The whole project would only be a "bottom" overhaul. Please bear in mind that before breaking my cam follower, I was flying rather happily, and had no immediate need for any type of engine overhaul. I know I am opening a technical-opinion-can of worms, however, I would like to hear different points of view before I make my very own decision. Eliacim Cortes -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm
