I have the same leak that developed in my 04 V8. Initial dealer estimate was $850 which I thought was outrageous. I went to another mechanic I trust and was quoted $3000. He couldn't believe Toyota quoted so low for a miserable and long job. His theory FWIW....this is a known design defect issue with Toyota, they are worried about a class action suit, and Toyota is subsidizing their dealerships to perform they repair as cheaply as they can....who knows, anyway I called my dealer and hinted at some of this ie. design defect, known problem, etc. and magically they were willing to take 20% of the bill so I'm down to about $600 for the repair which is still way more than I want to spend. Do I take the deal or roll the dice with the WS???