Why Proper Break‑In Procedures Matter for Aircraft Engines
When you invest in a new or overhauled aircraft engine, whether it’s for general aviation or a complex installation, the initial hours of operation are crucial . Proper break‑in isn’t just a formality — it sets the foundation for long-term performance, reliability, and maintenance costs. Let’s explore why the break‑in period matters so much, and key steps you should follow to protect your investment. The Purpose of Break‑In At the heart of the break‑in procedure is the seating of piston rings against the cylinder walls. When cylinders are freshly machined or overhauled, their inner surfaces have peaks and valleys from the honing process. The piston rings need to wear in gently but firmly against those surfaces to create an effective seal. If this seating doesn’t occur properly — or is interrupted by incorrect procedures the result can be increased oil consumption, poor compression, cylinder-wall glazing, and ultimately expensive repairs. For operators of small aircraft in Ala...