Before you start this job, allow the engine to cool down, disconnect the negative battery cable and proceed to drain the coolant in to a pan by loosening the drain plug located at the bottom of the radiator as shown in the picture.
Remove the two wing nuts that secure the air cleaner housing in place, remove the lid and the entire air cleaner assembly.
Remove the upper radiator hose.
Unplug the coolant temperature sensor wire connector.
Remove the nuts that secure the ground wires in place ( note their location, you will need to re-install them back after you replace the intake manifold gasket.).