I need the torque specifications for an 07 Chrysler Pacifica 4.0 L, water pump and timing belt replacement.

SOURCE: Do I change water pump when having timing belt changed

I would go to auto zone and get a diagram and the timing belt and do it yourself and the water pump (no it does not have to be changed everytime the timing belt is changed but if the car has over 60,000miles then it is best to change them both) it is not that hard especially if the car is not out of time just make sure you disconnect the negative side of the battery

SOURCE: torque specifications for head bolts 1995 Jetta 2.0

First pass, torque them to 30 Ft Lbs working from the center outward. Then go back again and torque them to 75 Ft Lbs.

SOURCE: Overheating engine

Check your oil dipstick for coolant, or a mucky substance. Your symptoms sound like a blown head gasket.

SOURCE: 2006 Chrysler Pacifica serpentine belt routing

here are a couple diagrams...




If you need anything else, let me know.

SOURCE: i am installing a timing belt on a 2004 chrysler

Click on the following: free, direct Link. It has several Diagrams including the Serpentine Belt Diagram for your 2004 Chysler Pacifica 3.5L DOHC V6. It has the Instructional and Directional Diagrams that will help you.

http://www.2carpros.com/car_repair_information/year/2004/make/chrysler/model/pacifica/2004_chrysler_pacifica_drive_belt_routing_diagram.htm

Standard Rules for Installing the Serpentine Belt with an Automatic Tensioner:
a. Pick a Pulley that is most easily accessed. This will be the last Pulley that the belt will go on.
b. Using the Diagram: Install the new Serpentine Belt on the remainder of the Pulleys....over, under, left right.
c. Using a Serpentine Belt Tensioner Tool or Wrench (See Diagram in Link: Rotate/Move the Tensioner Pulley/Arm "away" from Belt contact area on the Tensioner. This spring is pretty hard and with a new belt, it will be even harder to install. Rotate/Move this to as-close to the maximum allowed inorder to have enough slack in the belt to get it up and over the last pulley.
d. Using your other hand - Pull the Belt up and over the Last remaining Pulley.
e. Before releasing the pressure on the Tensioner, visually inspect the remainder Pulleys and the Belts' Positioning on them.
Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!