If yours has failed cortega part number 80000385 is incorrect for models with the hydraulic pulley bolted to it. The correct part number is 80000685, it's not in the catalogue motor factors have, as 80000385 is incorrectly listed for all xm's.

I had problems when one of mine failed a few year years ago. I had one from a scrap engine and found that it had a boss on the inside that prevented it sliding far enough up the crankshaft, so I got someone to machine it off for me. Worked a treat!

Peter.N.