Radioflyer
Well Known Member
I was borescoping nitrided cylinders on a TMX 360 engine. The engine originally had ECI cylinders which the owner replaced with overhauled Lycoming cylinders due to the ECI AD. Those Lycoming cylinders were prepped by a commercial FBO and the cylinders now have about 325 hours.
Overall, the cylinder bores, valves look quite good. However, the cross hatching looked rather course and rather flat, no where near 45 or 30 degrees. The compressions are great, engine runs fine, oil consumption normal. Has anyone seen only slightly angular cross hatching patterns in normal cylinders?
Overall, the cylinder bores, valves look quite good. However, the cross hatching looked rather course and rather flat, no where near 45 or 30 degrees. The compressions are great, engine runs fine, oil consumption normal. Has anyone seen only slightly angular cross hatching patterns in normal cylinders?