As in title, I've made a mess.
I was refitting the sumpguard before going to supper, just after changing oil&filter, and while tightening the rear bolt (the one under the engine) I've stripped the thread. I think it already was at a good point by itself because I haven't forced it too much. Anyway, I don't know exactly which thread has gone between the one on the bolt and the one on the welded metal tab, but I guess the one on the bolt has because it doesn't want to come out (if the metal tab's thread had been stripped instead, the bolt should come out quite easily, or at least I think so).
And this is the problem, because if I'll be able to find a way to take that @#* bolt out I could easily re-thread the hole, if damaged, or simply replace the bolt. I've already tried by turning the bolt with a spanner, while pushing it out through the hole in the sumpguard, but nothing has happened.
The curious thing is that I didn't want to remove the sumpguard either, but I did because a little amount of oil dripped inside it and I wanted to clean ...
Every suggestion is appreciated.
Simone