Peugeot training video from the late '80s on how to change the timing belt on a 405 Mi16 motor - XU9J4. Uses SEEM tension tester, but hopefully useful nonetheless.
Please note that if you have a special pair of cam shafts and they have been set up by an engine builder it is imperative NOT to move the front tension roller. If you do the valve timing of both inlet and exhaust will be lost.
