Q: Should one read the oil level with the dip stick screwed in or just resting on the threads? Gary Brown, via email A: Gary, I’m glad you asked this question even though I can see the boys in the hangar beginning to smile about it. First of all, it’s not quite as simple as […]
Should I pull the cylinders in my Pitts?
Q: I just bought back my original Pitts Special after 41 years. It now has a narrow deck O-360 that hasn’t been run in four years. I’m getting the PS-5C overhauled, but wonder what you think about pulling cylinders to inspect the camshaft before running it. We borescoped the cylinder walls and there appeared to be a honey-colored film on […]
Ask Paul: Does glazing mean cylinders must be honed?
Q: I am in the process of acquiring a Piper Seneca equipped with twin Continental TSIO-360-RB engines. Both engines have about 450 hours to go before overhaul. The aircraft was last flown approximately three years ago. Technicians maintain that the cylinders have to be honed due to glazing as a result of the time elapsed since the […]
Ask Paul: What to do about a broken stud?
Q: If on a radial engine (specifically a Warner) one finds one stud broken at the flange level, would you recommend replacing all the affected cylinder studs? I assume cylinder movement caused the break. Gennaro Avolio A: I believe in this particular situation I would only replace the broken stud. However, I would very closely […]
What’s fueling higher engine temps?
Q: I own a factory overhauled O-360 A4A, which I’ve owned since it left the factory. I’ve flown behind it for 600 hours. I recently had a prop strike and the engine was stripped and reassembled with no damage found. All they replaced were the exhaust valve guides and piston rings. (And all the rest as per […]
How extensive an inspection does my engine need?
Q: I have 210 hours on my engine, which was overhauled in November 2009 at 3,288 hours. Five of the eight studs are now broken on cylinder #3. The motor had only a slight vibration during the last 3/10ths of an hour before discovering the broken studs. I would appreciate your input as to how extensive an inspection […]
What’s causing a constant roughness in my engine?
Q: I own a 1963 PA24-250 Comanche. Over the past two years I have replaced all six cylinders, both mags, harnesses, primer lines, new fine wire plugs, fuel lines, engine fuel pump, both electric boost pumps, and I am baffled. During cruise settings at 2,400 rpm and 23 inches of manifold pressure, my engine still feels […]
One engine, many questions
Q: I have a Cessna 172N with the Lycoming O-320-H2AD 76 series engine, serial number L-3406-76. I’m trying to sell it, and I’m getting all kinds of questions regarding the “A” suffix, the “T” mod, and others that are way too far out there to even mention. As an A&P/IA, I’m fairly familiar with the […]
Ask Paul: Should I worry about just a little rust in the cylinders?
Q: My Piper Colt PA-22-108, has a C1B installed. I have a little rust in the cylinders in the lower part. From the middle part and up to the top of the piston area there are no cracks or visible rust. I have honed all cylinders and there are no sharp edges. GUNNAR HEGSTAD, Norway A: […]