I'd take your first few $15 and reinvest it by getting someone on oDesk to go through and fix stuff.
* First section I looked at was 'Brakes'. First article is about the windscreen washer. Then there's two articles called "Adjusting the Brakes /1" and "... /2". Why two?
* In the first there's one massive unreadable paragraph. In the second there's paragraph-length titles.
* I'd also look at getting your oDeskers to put the images in interesting places within the text.
At the moment it feels like an OCR dump of a book rather than the amazingly useful website it could be (and thus it feels like an SEO AdSense site).