Proper valve rocker clearance for O-235-K2C

kubark42

Active member
Joined
Mar 25, 2021
Messages
31
Location
Massachusetts
As I'm going through the documentation on my new-to-me 1998 7EAC, I noticed that there's the 100hr valve lash inspection. It looks easy enough.

Frustratingly, however, I don't know what should be the clearance. My engine plate says 0.005". All Lycoming documentation says 0.007" - 0.009".

Do I believe the Lycoming plate or the Lycoming manual delivered with the engine?

P.S. Others have a similar problem, although for them the engine plate says 0.010" which is consistent with Lycoming service notes indicating that 0.010" is the ultimate goal and 0.007-0.009" is the way to get there.
 
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