I finally got my Audi to start! I see there are a lot of new people here on oppo, so to catch you up, this is my '91 Audi 90 Quattro 20V. It's had a long string of problems ever since I bought it back in late 2010, but I'm finally starting to get it close to being properly roadworthy again.

Part of the repairs I've recently done involved replacing the following: timing belt, water pump, power steering pump, front CV axles, front right wheel bearing, and a new starter. But after I finished with the repairs, it wouldn't start. Figured out that I had my starter's spade connector on the wrong connection. Switched that and now it starts, but makes an awful noise. You can check that out here:

I jacked the car up today and pulled things apart just enough to get a look at the smooth side of the timing belt to see if it had any marks on it from rubbing, and it looks exactly like it did when I put it on. What I can see of the teeth look unmarked as well, but I can't see much. There is, I suppose, the possibility that the tooth side is rubbing. That would at least explain why the noise is so loud.

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Another theory is that the starter is not disengaging. It would help to have a helper to get that off though because of where the exhaust is positioned, so maybe I'll tackle that tomorrow if I can find some help. Then I can bench-test the starter and see if it's working properly, and if it is, I can look into the possibility of it needing shims.

Failing that, I'll need to pull stuff apart to get a good look at the timing belt and all of the related components and see if something is wrong with them. I'm really not sure what it might be yet.