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Peter's advice is comprehensive and accurate. Esp the impact wrench part if you're going to cheat for time. I've never had a problem with one, and even the dealers are using them on B230 engines. You're not supposed to, though.
If you have an auto trans, you can blast the nut off with a breaker bar, using the starter of the car (briefly!). Don Foster sent me some good information about that method a long time ago, and I used it several times. Works like a charm.
The seals are simple. The crank seal is kind of a pain to put in, so here's a tip: Clean out the seal housing with brake cleaner or something like that. Just wipe it in there; don't spray it (obviously). If the outer seating part of the seal is dry, and the bore is relatively grease-free, you can gently tap the thing in around the circumference, and it will seat perfectly every time.
I'm sure you can do it--but this is a little piece of advice after trying it way too many times with the outer lip smeared with RTV sealant. It does seal well, but it also slides all over the place if you're trying to seat the seal.
The intermediate shaft seal is a breeze. In and out. Same size as cam seal.
Both the intermediate shaft seal and the cam pulleys have to come off. I use a rubber-coated strap wrench to take them off (when an impact is impractical or unavailable). You could probably devise another method, however that one seems to be a good answer. It's a good piece, and I payed up for it. Never failed me yet.
Like Peter said, do the pump if it's a leaker or if there's play in the bearing. If the tensioner is a noisemaker, you should dump that one too... although they can go on for a while like that.
Because I'm kind of a screw-up on seal jobs, I try to have a spare crank and intermediate (or camshaft) seal lying around in case I really make a mess of one of them. That's the worst feeling you've ever experienced, not having a spare of one of the cheapest parts.
All of that said, I love doing the B230 timing belts. The other day some guy showed up at 10:30 wanting a timing belt. He had an appointment at 12:30. At 11:45 he was out the door, and that was a Turbo automatic. It's fun and easy. The only thing is getting those bolts and pulleys off. Very possible, but if anything is going to hold you up, it'll be that. Also sometimes getting the accessory belts (esp A/C) off is a pain. You can run the A/C belt off with a big screwdriver and turning the engine over with a breaker bar. That does the trick. The others should loosen easily.
Have fun.
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chris herbst, five volvos.
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