What is the overhaul requirement for Lycoming?
All Lycoming Engines have a recommended calendar overhaul of 12 years regardless of the time on the engine. HOURS: Engines that have large main bearing dowels and redesigned camshafts may be operated to 2000 hours between overhauls.All Lycoming Engines have a recommended calendar overhaul of 12 years regardless of the time on the engine.Aircraft engines must undergo overhaul at specified intervals, measured in flight hours or calendar time. Most piston engines have Time Between Overhauls (TBO) recommendations ranging from 1,800 to 2,400 flight hours, while turbine engines may extend beyond 3,000 hours.There is no limit to the number of hours or number of overhauls on an engine. I would recommend that during any overhaul everything should meet limits for new parts and new (not overhauled) cylinders should be installed. If this is done (standard practice at better shops) the engine should go to TBO every time.
What are the two types of overhauling?
Overhauls can be classified into two types: partial (or top) overhaul and complete (or full) overhaul. A partial overhaul focuses on the upper part of the engine, dealing with components like cylinder heads, valves, and pistons. An engine rebuild is often the better option when you’re planning to replace everything to get your current engine to as clean of a slate as possible. Overhauls are good when you need to update specific parts or pieces to keep things running smoothly.