I am trying to rebuild rear callipers for my mk3 fiesta, got my self some second hand hubs , carriers , callipers etc… now one calliper is seized so I thought rebuild! How much grief any way fully stripped but not the rear where the handbrake mechanism is, 13mm an a torx bit there is a seal whitch I can’t get off without tearing an ripping it, looks like it’s pressed in! Is this normal!!! Any help ??