Originally Posted by
Bill Greenwood
i'd like to know more details about this engine, and see some photos of the rest of the parts. If the damage was caused by corrosion, then there would likely be similar damage on other parts.I notice there is no damage in the photo on the side of the cam or on the tan colored part. Why is it only on the polished part, and not on the nose or top of the cam lobe?
I have seen upper end wear on cam followers and cam faces in Merlins. I have never seen any evidence of corrosion in one, just friction wear, which seems to be mostly from inadequate lube on first start up. And note most Merlins are not flown much during the winter.
Maybe Lycomings are different and very subject to corrosion.