Use caution when removing and installing oil jets. Damage to oil jet nozzle could cause severe engine damage. Care must be taken not to damage the crankshaft tone ring when removing cylinder number four oil jet.To prevent damage to the oil jets, remove the oil jets before removing the pistons.Disconnect negative battery cable.Raise vehicle on hoist.Remove the lower oil pan.(Refer to 9 - ENGINE/LUBRICATION/OIL PAN - REMOVAL)Remove the oil pickup tube.Remove the upper oil pan.(Refer to 9 - ENGINE/LUBRICATION/OIL PAN - REMOVAL)Remove the balance shaft assembly.Remove the oil jet.