ExtraKatana
Well Known Member
I bought a boroscope and decided to look at my exhaust valves in my IO-360 of 750hrs. I always TO ROP of course and do most of my cruising LOP. Go back to ROP in the descent. I tuned. My injectors with Don at Airflow Performance a few years back via his remote method of recording EGT’s. My EGT’s show in the mid 1400’s LOP. About 100 or so hotter than ROP. I was surprised to see what looked like lead balls all over the face of the valve. A thin consistent caked on layer of lead with droplets of lead around the edges. Although the valve had a concentric wear look and didn’t appear to be burnt anywhere(again, just looking) I couldn’t see colors....like a green to designate a burnt area. The spot in the middle of the valve didn’t have lead attached to it or at least not much. Is this normal to have this layer on the valve?
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