Looking at the EPC exploded view, it seems to me that the previous mechanic placed the big washer incorrectly. The big washer should have been placed BEHIND the balancer. Instead, he placed it in front of the balancer.

Removing the 6 13mm bolts will be challenging. I have little or no clearance to insert my 13mm socket......

Even if I removed the 6 13mm bolts, I will not be able to remove the pulley/balancer because that big washer is preventing me from removing it unless I also remove the 27mm bolt. That's the last thing I want to do.