Thanks for the info but it's not shredding the belts instead it's breaking the spring. Also on this model it is mounted inboard and the arm passes through a hole in the engine block so misalignment shouldn't really put any side load on the tensioner. It does make me wonder if hole has a bit of...

Thanks, this is a real head scratcher!

I am in Plymouth and hope to find this useful to help me solve a recurring problem with my elderly Dads TD4. Sorry but this is a long story! It starts when when 2002 TD4 Freelander suffered crankshaft pully damper failure. An aftermarket pulley was fitted with a lot of blood sweat and tears...