Cam plug leaking. Removal and replacement?

What year of a block are you working with? There's two styles, one like what toolmanmike posted (for use in an early design block) and a later design that's a backwards double folded looking style. I'll go get one if pic is needed. The first style can leak if not installed properly, but the second style I've never seen leak. Sadly it can't be used in the first designs place.