I bought a new timing chain tensioner, which should be an easy replacement,
but I found a half a bolt in my head, that should be holding a timing chain guide.
Drill, (never) easy out, wish me luck.
(Update: Don't remove the broken bolt, just buy the updated Dorman part to fix this)
Looks like the chain guide has no wear marks on it, so it either broke right after it was replaced, or the last owner left it this way.
I don't see the other half of the bolt anywhere... but I'll run a magnet in the oil pan.
All this, and a autocross that I want to go to on Saturday...