[Mike the mechanic]

I specialize in watercooled VW's so here's the scoop. You have 12 to 16 bent valves. Sorry! The 16v is an interference engine, unlike the 8v.
About the crank pulley, don't remove the 12 point 19mm bolt in the middle or else you will be pulling the crank timing gear with the pulley. Instead, you have to remove the 4 6mm allen bolts that secure the crank pulleys on the timing belt gear. Once those are off, the pulleys come off by hand. To remove the lower cover, there is 3 bolts and one nut, assuming the upper cover is off. You will have to remove the water pump pulley (3 6mm allen bolts) in order to remove the lower cover. The lower cover has a 5mm allen bolt just over the crank timing gear, a 10mm nut to the left of that, a 10mm nut to the right of that.
Hope this helps.