Here is what I know about the Engine on N293CM:
1. It is a Lycoming IO-360. It is fuel injected, serial number L6343-51A. Based upon the serial number it was likely built in 1963.
2. It sat in the airplane for about 5 years when the airplane was dormant. Presumably it was never started during that period, but again, that is only speculation on my part.
3. While it has always been a solid trouble free engine, before I had major work done on it, it burned oil more than it should have. My A&E speculated that rings were probably the issue, most likely from being compressed in one position for a lengthy period.
4. In June of 2007 I had the bottom portion of the engine overhauled. I did this not only because of the oil consumption, but because I did not have any history on the engine, I wanted a reputable shop to take it apart and make sure it was airworthy, make sure that all the AD's had been met, and insure that I wasn't going to find myself stranded some place because of an engine issue. In a nutshell, I fly this airplane, it has my wife, my kids, my grand kids in it. I want it to be safe.
The shop did a great job. They kept me appraised of what they found, and I authorized them to do what ever was necessary to make the engine right. The work the did included things like, the case was repaired surfaced aligned and bored. The cam and lifter bodies were all ground, the cylinders were repaired. You can see from the parts list in the link below, that it got a new fuel pump, a ring job, and all the AD's were checked and any outstanding AD's were complied with. This is the most important thing that you should want to know: The engine is uptodate with all the AD's relating to the engine.
When the engine was returned to my A&E, he installed the engine using the existing infrastructure that was there. I did have him install new Mags at the time, because he suggested that it should be done at that time. My mechanic worked on my Mooney M20C for the 10 years that I owned it. He does not cut corners, and he ain 't cheap. But I have never had a mechanical problem with either airplane that he as worked on that put me and my family in harms way. That to me is worth every penny I paid him.
5. The Engine has at least 1000 hours left on it's life. That is what the folks who worked on it estimated, after they had totally disassembled it, and reworked the lower portion and reassemble it. Now, there are no guarantees, but these guys work on these engines every day, so they know what are looking at.
The work was done by Premier Aircraft Engines Inc 1000 NW Perimeter Way Troutdale, OR 97060. Premier is one of the best Lycoming facilities in the North West.