I'm doing my timing belt on my MKV GTI at the moment. I'm replacing all the hardware affiliated with the timing system including the water pump. My motor is an interference motor which means if the timing is slightly off, the valves will contact the pistons. I've never done this before so it's a big learning experience for me. Anyone here do theirs? Ever work on interference timing belts? Thank god you only have to do this around every 100,000 miles.