I did try an offset wrench - won't reach, but raising the engine is a neat idea, especially as I have to replace the engine mounts anyway. The vice grips may work - I would never think of that - I'm just too nice to my tools!

Any idea how many turns add 0.1 Bar? Don't want to do this too often!

BTW, what's the secret to keeping the 603 explosion proof? I like the idea of a 300/350SD(L) but they seem to have a poor rep for head gasket leaks or bent con rods, respectively.