The adjustment bolt for my cam chain tensioner twisted off, flush -naturally - with the housing despite many days of soaking, gentle coaxing.
Looks like the housing is held on with three bolts into the heads there, hope they come out ok.
Actually as I have not changed the adjustment I might just ride it instead, fix it next winter.
Drill out, ease out.
Is that about right?
I am going to stay active in all ways, and fend off age at every turn - I hate rusty knees and hips, wrists)!!