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Wickware, I can't really speak to the vacuum leaks b/c I've never had any on my Camry. I did do the timing belt and all the replacable pulleys when I got it just to be safe. Since that belt is behind a cover and isn't exposed to the elements like the accessory belts are, it's hard to tell if it's bad or not by looking at it. The belt may look brand new, but be ready to snap anytime.
I don't know how long it took to change the belt, but I've since had to get in there 2 more times. The o-ring seal to the oil pumped failed and created a bad leak. Then a couple weeks after I fixed that the waterpump gave out, and I just replaced that this past weekend. It may not be a bad idea to replace the water pump & the oil pump seals while you have it apart. The dealer said it's common for the o-ring to fail and the water pump go out so a lot of guys will replace that stuff with the timing belt. My car does have 203,000+ miles on it now though so that probably had a lot to do with it too!
It sucks to have take it apart so many times, but I;m now pretty good at it! I can now take it apart, fix whatever needs to be done and have it back together within a few hours. So, get a good factory shop manual or at least a Chilton's manual and you'll have no problem checking and / or replacing your timing belt. Good luck to ya!
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