Have you ever seen something like this? It seems to be a stud and a spacer merged together. This is where timing belt cover is fitted and tightened with a nut. Should I just use a spanner to open the hexagonal spacer and then remove the stud? I don't want to damage it. There is a similar stud like this between camshaft pulleys. I want to remove that one because it doesn't let me install my cam pulley holder tool between cam gears. If I know how to remove this one, I can do the same for the one between pulleys.
It’s a long nut with a thread on both ends if you need a simple description.
If you need to make one quickly, having lost one for example, then a threaded rod cut to length and a handful of nuts works.
To remove just use the correct spanner - the ring end is better but depends on access and it can get close to the bottom to undo, it’s a one piece thing.