I’ve been leveraging my airframe and powerplant education lately on a 1960 Piper Comanche 180. One of the benefit packages that come with an A&P certificate is the delusion that I will come out ahead by buying an old airframe and sinking time and money into it. My rationalization works like this: There are only 230,000 light aircraft in the United States, which has a population of nearly 300 million souls. Someday people are going to realize that light aircraft are rare and scarce and that’s when I’m going to be in position to cash in. At the present time, I’m still in the cash-out phase of this equation.
Yesterday I drove out to my favorite engine shop to get a new oil pressure check ball. When I took mine out to inspect it I found a little corrosion and a wear spot. I pulled it to look it over, but mainly to put a couple of washers under the relief valve spring to up the oil pressure. Lycoming says my O-360 should have an oil pressure of 75 to 85 psi at cruise; mine is 62. The PA-24 owner’s manual says the green arc is from 65 to 85 psi. I put in a new spring and one washer. I’ll fly it today and report back on the progress.