Here's the link to a full factory service manual for the '97 pathfinder.
http://www.boredmder.com/FSM/N...1997/
You will want to download all of the PDF files in the directory. The fwd.pdf file is your table of contents page which has links for all of the other PDF topics. For the cooling system information, you will want to look in LC.pdf. You may also want to try MA.pdf for info on how to refill the cooling system.
There are also manuals for every Pathfinder from 1994 - 2009 (also every other Nissan model and some Infiniti models) on that same site.
Modified by Pwnin O'Brien at 11:59 PM 8/2/2009