Leak down test shows intake valve leaking

In this video I show how a bent valve is indicated by a shop towel fluttering in the air flow of the intake port of the engine head by pumping air through the spark plug hole via a leak down test. -- I misspoke in the audio when I said all the lash was out... What I meant was the opposite - I'd loosened the rocker so there was no lash adjustment to hold pressure from the push rod against the rocker.