Just a little heads up from my own expirences. The leak from your power steering is likely caused bu the ps vacuum valve. It's a plastic piece that screws into the ps. It is make of plastic and cracks. My ls400 has the same motor and the power steering leaked for a little while and it dripped on the alt. causing it to go bad. It wasnt a big leak but did the job. Found out it was a common prob for these motors. Just giving you the heads up to catch it before bigger problems arise.