I found the torque specs at the very end of the 4.0L engine section of the 2007 Nitro pdf service manual that I purchased on eBay a couple weeks ago. http://www.ebay.com/itm/DODGE-NITRO...-MAINTENANCE-FSM-MANUAL-/151579762609?vxp=mtr12Nm = 8.8 Ft Lbs. Where did you find the specs? Neither my hard copy or my PDF files have these for the 4.0.
It is not organized very well, and has no embedded links to take you from one part of the manual to another, but it is better than nothing.
My torque wrench is a half inch drive - max. 150ft/lb type, which is not really suited for any torque values less than 10ft/lbs, but I did set it at 8ft/lbs and check all the water pump bolts. Some of the bolts did not trigger the click on the torque wrench, but I did not feel comfortable turning them any further, as I did not want to snap a bolt, or strip the block threads and have to do a bolt thread repair and further delay the completion of getting my Nitro back on the road.
With the type of gasket that the water pump uses, I feel confident that all the bolts are tightened down enough to prevent any leaks. I had to quit working on it yesterday, due to back pain again, but hope to get the damper pulley re-installed today and the power steering "Stretch to Fit" belt installed, so I can then get the serpentine belt assembly mounted and the radiator put back in place. If I am real lucky, I might get close to finishing this repair job today. Just depends on how my back is feeling and how long I can push myself to try to finish.
Any of you younger guys & gals reading this, take good care of your backs and never lift more than you know you can comfortably handle. Once your back is damaged, it is almost impossible to fix it and you can't imagine how having constant back pain will change your life.