[lust4speed]

Looks like maybe the pin came loose and the total load on one side of the lifter killed it.

Haven't had an outright roller lifter failure, but have put up with some tapping lifters and several sets were replaced under warranty and in every instance the second sets were quiet. Even had three bad sets of the new design Comps which had plungers stick and freeze in place - definitely a quality control issue with clearances, but at least they replaced without question. Last eight months the sets ordered have been fine.

Now here's the frustrating part. I was one of the first in line when the aftermarket HR lifters were introduced. Placed my order and waited a couple months for production to ramp up. Ended up with one set of Comps and one set of Cranes because that was what came in to the local speed shop (back when Summit wouldn't sell to California residents). Both sets were, and are, dead quiet which must be 20 years and many thousands of miles later. Never a problem with either and they were good past 6,500. Fast forward to today and every manufacturer is shooting themselves in the foot and struggling to produce a workable product.