I have a 1994 Astra MK3 1.4SE MPI.
I have just changed the alternator, but I have a problem.
If I bolt the alternator straight back in, then there is no way of getting of the belt on.
If I put the belt on, then I can't bring the alternator back far enough to allow the bolts to slot in to the required position.
When I removed the alternator originally, as soon as the bolt was released, it moved to the same distance it is now at. So im guessing I have to release the tension somehow and then tension it back up.