Q: I just bought a Piper Mojave. It has 1,200 hours on both engines. Pre-buy, including oil analysis, was good. During a maiden flight, the left prop feathered on prop check. We checked the dome pressure, it was low. We topped it to 41 psi. Took off for an hour flight. Landed and left prop […]
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What should I do about rust in the barrels of cylinders?
Q: I read some of the material you have posted and was very impressed. I have a question about finding rust in the barrels of the cylinders. Here is the situation: A customer is looking to buy a Piper Lance II. It was asked that we do an annual instead of a pre-buy inspection. The engine […]
What is fueling high engine temps?
Q: I bought a 1972 Cessna 177B with an O-360 a few months ago. It had 900 hours on the engine. My first 20 hours I would use 23 squared and pull the mixture back to 10 gph or less, then watch the cylinder head temperatures, monitoring to keep the hottest (#2) around 385°. When […]
Are my oil pump gears OK?
Q: I found an old article with your name on it, regarding AD 96-09-10 and oil pump gears. My information is as follows: My Lycoming O-320-E2D, S/N: L-24557-27A, was overhauled by Penn Yan Aero back in 1990 when the engine had 2,000 hours on it. During my annual in 2011, the question came up about oil […]
Breaking in the engine on an RV-6
Q: Hello, Paul. I live in South Africa, Johannesburg. I love reading your articles on engines. You have wise words. Thank you. I have an RV-6 built by myself and my brother-in-law. We fitted a Lycoming O-320-B2C that got overhauled after 560 hours by Alton Engineering. I believe you will be able to help me with […]
Can you rebuild a narrow deck engine into a wide deck?
Q: I’d be most grateful if you could advise whether it would be feasible to take a narrow-deck Lycoming 360-A1A and rebuild it as a wide deck 360-A1A, with a new crankcase and cylinders. What parts could be reused otherwise? Mark Holmes A: Mark, you asked for my advice regarding taking a Lycoming 360-A1A series narrow-deck […]
High temps after overhaul
Q: I have a Lycoming O-320 engine that was overhauled by an IA who has overhauled lots of engines and, ever since, the oil temperature runs very high. The oil gauge was checked for accuracy, and the oil cooler was sent out, cleaned and checked. I replaced the varitherm and the induction tubes have new couplings and clamps with […]
Is the O-435 a tough engine?
With regard to the overall reliability of any engine, it’s simply a matter of operating and maintaining it in accordance with Lycoming’s manuals using the old philosophy — you take care of it and it’ll take care of you!
Getting an idle aircraft flying again
Q: We have a Piper Navajo PA-31-350 that has not flown in three to four years, but maintenance has been done on it continually. During intervals the engines were started and run up. What are the requirements as to the engines (or the aircraft itself) if it has not flown for three or four years? Are there any Service […]