I've got a mate's liberty that I've had the privilege of it's use for the last month or two. Since he got the car it's had a rattle in the rear end on the left. It only happens at low revs when the engine is just above that labouring rev loading; when you use the clutch really harsh and sometimes when you're cruising over those little bumps on the freeway.
It was only on the left but I have noticed it on the RHS too. I had found a fuel or brake line that was not held in it's bracket, thought I had it at that one but alas it wasn't the culprit. I also thought it was the hand brake cable so I cable tied that up as I could see where it had been rubbing.
I really need to get this rear end up so I can get under it and have a real good look around, but I don't have a set of ramps (yet).
I thought the collective knowledge of the forum might be able to help me out or point me in the right direction.
We've had the door skins off but it sounds like it's coming from the skirts under the back seat and it really sounds like a metal fuel line or brake line that's rattling.
I'm keen to get to the bottom of this before I give it back - I've got some time up my sleeve but best to start on this early

Cheers
Bennie