The two most common questions that I still get are: 1. What oil should I use in my aircraft engine? And 2. Are different brands and grades of oils compatible?
After Oshkosh, I sent an email to Michael Kraft, Lycoming’s senior vice president and general manager. Due to this busy travel schedule, he was just able to get his answers to me. To honor his request, I agreed to run this in a Q&A format.
Q: Is Lycoming working on or considering development of a diesel cycle piston aircraft engine?
Continental Motors has increased TBO up to 400 hours on Gold Standard Factory produced engines.
Q: Recently — 50 hours ago — I had a Lycoming O-360-A4A overhauled with new ECi Titan steel cylinders installed. The #3 cylinder has had high-ish CHTs from the beginning. [Read more...]
Are you ready for winter? Is your plane? AVweb recently published a primer on the importance of preparing your plane for winter. It’s complete with detailed instructions for Lycoming and Continental engines. Check it out here.
Q: I lost the left mag on my O-540. When I took it apart, I found four aluminum specks in the top oil screen. I pulled the rear housing off and found the aluminum gear still in the engine. I sent it off for repairs to Tulsa, where they installed a new oil pump, shaft, gears and housing, as well as a new fuel pump and dry vaccum, and two rebuilt mags. I ran it for 1.5 hours, then pulled the screen and found a few specks again, but not as many as the first. Any ideas?
In the past few months, my friend Paul McBride has written several very interesting and informative articles on “breaking in” an aircraft engine, including “How to break-in your engine”. I recommend that you read them when or if you have a new or rebuilt engine to install on your aircraft. [Read more...]
Q: My partner, Lou, and I just had our Piper PA 28 235 overhauled and are having problems with the lower plugs getting oil fouled. The plugs have been cleaned a couple of times but she runs rough and they foul again. The mechanics are talking about putting a thin wire plug in. My concern is that we could have a leak in the valve stem seal, rings, or head or valve cover gaskets. The cylinders were rechromed and we had new rings, the valves machined, etc. One shop did the machining and cylinders, another shop assembled everything.
Where should we start?
TOM CAMP, via email
I recently received a letter asking about engine break-in following overhaul. This is a subject that should be of interest to everyone, even though you may never actually have the opportunity to break-in an engine during your flying years.