2004 Forester XS (SOHC EJ251)
Is my crank pulley shot? If so, how/why?
Short story: I can hold the outer edge of the crank pulley in place, but the inner portion spins.
Long Story: Today I was trying to remove my crank pulley in order to replace my timing belt. I have a chain tool similar to this one that I use to hold the pulley in place. With the outer edge of the pulley held in place, I began loosening the bolt that holds the pulley to the crankshaft. This is where the problems start. The outer portion of the pulley stays still, while the inner portion turns with the bolt. Just to double check what was happening, I pulled the driver's side timing cover and confirmed that I can turn the crankshaft while the outer edge of the pulley is held perfectly still.
Longer Story: The other day My car suddenly started idling really rough while I was stopped at a light. It stalled itself out, but I got started and pulled to the side of the road. Running terribly and lacking in power BIG time. I popped the hood and saw that my A/C belt was shredded. The nut that holds the idler pulley to the bracket of the A/C belt tensioner was GONE. The belt forced the pulley into the timing cover, which cut a big hole in the cover and shredded the A/C belt. I suspect that the pulley also pushed on the timing belt and caused it to jump time which gave me the rough running and low power. I basically idled it the 2 blocks home and started to tear it down. That's when I discovered this odd behavior from the crank pulley.