I would give a call to the GT Guy, Kendall and/or Shadowman. Or, any of the engine modifiers (Hennessey, Accufab, etc). Or PM Soroush.I do have the manual. It does not cover the actual operation of the tensioner. One tensioner I could push in by hand, the other seemed like it was locked solid at first then eventually would compress by hand (after many tries).
There is no visible damage to the sealing bead, however not sure about the permanent compression.