On the third illustration #1 is pointing at a bypass hose. You should replace this hose with the water pump. It is exposed to high heat and is usually the first hose to spring a leak.
REMOVAL The water pump on all models can be removed without discharging the air conditioning system (if equipped).The water pump on all gas powered engines is bolted directly to the engine timing chain case/cover.On all 3.9L/5.2L/5.9L gas powered engines, a gasket is used as a seal between the water pump and timing chain case/cover.If water pump is replaced because of bearing/shaft damage or leaking shaft seal, the mechanical cooling fan assembly should also be inspected. Inspect for fatigue cracks, loose blades or loose rivets that could have resulted from excessive vibration. Replace fan if any of these conditions are found. Also check condition of the thermal viscous fan drive.
Loosen heater hose coolant return tube mounting bolt and remove tube from water pump. Discard the old tube O-ring.
CLEANING Clean gasket mating surfaces as necessary.INSPECTION Visually inspect the water pump and replace if it has any of the following conditions: