Rollin’, Rollin’, Rollin’...

Lycoming’s Roller Tappet doesn’t slide on the Cam lobe – the roller moves over it.
Lycoming’s Roller Tappet doesn’t slide on the Cam lobe – the roller moves over it.

Today's session at the Lycoming Service School included a little hands on time with maybe the most "radical new technology" to be included in these engines in the last few years - roller tappets. No, Lycoming doesn't change things very often, but they have spent enough yeas with spalled tappets and camshafts that this is a plus. In a company that measures service data in multiples of decades, it is probably too early to say that these are definitely the answer to everyone’s prayers, but they certainly seem to be the way to go – and obviously, the aftermarket suppliers think so, as they were doing them early on. Continue reading "Rollin’, Rollin’, Rollin’..."