The CMP sensor of the 4.2L V6 variant is fixed to the camshaft synchronizer that is situated on the upper part of the timing chain cover. If only the CMP sensor is to be replaced, then the synchronizer does not have to be pulled out; this is done by pulling out the sensor after undoing the bolts holding it. But if the synchronizer must be unbolted to do something such as replacing the timing chain, it must be reoriented with this tool. Start by putting the piston on the No.1 cylinder at TDC and switching off the car's power by removing the negative terminal on the car battery, draining off the coolant, removing the heater outlet pipe and the electrical connection of the CMP sensor. Mark the position of the CMP sensor electrical connector if the synchronizer is to be removed then you remove the sensor and also the synchronizer hold down bolt and with a pulling force you can take out the synchronizer. Utilize the special alignment tool to fix the synchronizer to the engine, apply the required lubrication on the required parts and position the synchronizer assembly correctly. Once the synchronizer is in place retighten the CMP sensor and make sure the electrical connector is properly positioned. On 2-valve 4.6L V8 models, the CMP sensor is on the front of the left cylinder head; it requires the disconnect of the battery, electrical connector, and mounting bolt. Starting with 5.4L and 3-valve 4.6L V8, both CMP sensors are on the front head and removal is as follows: On both the 3.5L and 3.7L engines, as well as in the 5.0L V8 engine, CMP sensors are positioned on the rear of the cylinder heads; the sensor in the 5.0L V8 is concealed behind a heat shield. On 6.2L V8 models, the CMP sensors are mounted on the rear of the cylinder heads too, and the removal is similar to 3.6L Pentastar engines-it is required to lubricate the sensor O-ring with clean engine oil before installing it.
