Service and repair of the water pump starts by uninstalling the engine cooling fan and fan shroud and
Drive Belt together with the water pump pulley. The upper radiator hose needs detachment from the water pump when servicing the 4.2L engine. The task requires removal of water pump bolts before extracting the water pump from the cylinder block while cleaning the mating surfaces for inspection. When installing the new water pump it is important to use only Motorcraft Premium Engine Coolant VC-4-A (green) or VC-5 (Oregon) or Motorcraft Premium Gold Engine Coolant VC-7-A (yellow), while avoiding the mixing of different coolant types. Water pump installation begins with engine coolant lubrication of the O-ring followed by water pump placement on the engine and temporary bolt installation according to specified tightening order. Set the water pump pulley on the water pump beside installing bolts in the correct sequence yet leaving them loosely attached. Finally, perform the complete bolt tightening. When working on the 4.2L engine you should put the upper radiator hose onto the water pump while you also install drive belt and complete the task with engine cooling fan and fan shroud.