I just pulled my motor apart due to a wiped cam after a few thousand miles. When I built it, I installed a Cloyes tensioner.

There is visible wear on the pads. Wish I had pictures handy, but the chain “bars” have worn grooves in the pad. Looks like it wore in until the rollers started hitting the pad, and then stopped. With the effective bearing surface increased, the wear will probably stop.

Before I re-assemble though, I’d like to hear some other tensioner wear stories.