I bought this van with a screeching belt problem. No problem, just tighten it up. A bit of mucking about and I discover it's the alternator belts. I know the PO had an alternator put in, but I thought he said a shop did it. No way, unless it was the shop from hell. First of all, turns out they deleted the belt tightening mechanism. I tried prying the alternator over and tightening the clamp nut. That fix lasted a day. Digging further, I find the nut on the pivot bolt on the alternator is stripped. Why? because the bolt is extending out only about 1 mm and the nut can't really grab it. Why? Because there is a bush on the alternator that's the wrong size, and so the pivot bolt is too short. While I'm under there, I also notice oil is leaking from the joint between the vacuum pump and the alternator. So that bad boy has to come all the way out.
Once the alternator has been removed, I cut the bush off short so the pivot bolt will fit.

That bush was an inch too long
With the pump off, I find that when they replaced the alternator, they forgot to install the O-ring between the two components, resulting in the oil leak.

Look ma, no O-ring!
By the time I got all this done it took me about 5 hours of mucking about because someone did an appalling job the first time around. If you don't know what you are doing, please leave it to someone who does.