I had a similar problem and just like you publish my problem in another place, but nobody could help me, I am tender in this mechanics but 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 \"