WOW Quest:A Chip Off the Ulduar Block (13681)  

Ok this quest is picked up in Icecrown as part of the Argent Tournament. The blocks you need are in Storm Peaks at 38.1,39.3, 40.1,38.2, 42.1,38.1 and 42.6,39.1. You basically put the "chisel" which is actually a bomb right on the block. Be sure to move as it deals up to 8k damage. It then breaks in to pieces these can be either 2,3 or 4 pieces and the re-spawns are very fast.