How do you adjust valves on 1998 Isuzu nqr?

http://www.onlinefreeebooks.net/automotive-machinery-power-equipment-ebooks/Isuzu/isuzu-n-series-isuzu-elf-workshop-manual-pdf.html

see page 57 of the manual, basically you are putting the no 1 and no 4 cylinders at top dead center and inserting an .016 feeler gauge.