I had a similar problem and just like you publish my problem in another place, but nobody could help me, my problem was greater because my engine was gripped.
But looking for my engine, I found this page
www.esnips.com
it is not forced to register only search in the upper
motor service manual
and depending on the Nissan B series engine that you want to polish in the zip. This will send you to another page where you will polzar the zip again. And automatically download.
The problem I had when these manuals were going down is that they brought password, and when trying to read them I could not access them, try all the ways to open them but I could never.
Until after a month it occurred to me to put the first letter of the alphabet and vual.
I hope they serve you, be it the first letter of the alphabet or the first letter of the bocals to serve you \ "a \"