Ford 1L2Z-5F250-EA
Converter & Pipe

The first step to work on a catalytic converter is to elevate the vehicle using proper supports. Start by disconnecting both heated oxygen sensor electric wires and the two wires for catalyst monitor sensors. The service begins with removing the right-hand heat shield-to-crossmember bolt and the left-hand heat shield-to-crossmember bolt and their accompanying nuts. Launch the transmission with support equipment while extracting the four upper bolts on the crossmember and four lower bolts and the crossmember itself. Remove the muffler from the converter while taking out its bolts along with springs and flag nuts before discarding the gasket and flag nuts. The converter assembly needs backing from a proper jackstand for its installation followed by removal of the bolt and isolator bracket. To proceed with replacement remove four converter-to-manifold nuts before extracting the converter assembly. Follow the procedure to take out the heated oxygen and catalyst monitor sensors when required. Before putting back installed sensors apply anti-seize lubricant to their threaded parts but only if they needed removal. Place the converter on the jackstand while inserting the four converter-to-manifold nuts only lightly. Place the isolator bracket before installing the bolt loosely while using a new gasket to install the bolts, springs and flag nuts. Tighten both the four converter-to-manifold nuts along with the isolator bracket bolt before removing the jack stand. Place the transmission crossmember into position before securing its lower bolts followed by upper bolts and nuts. Begin by removing the transmission jack after which install both the bolt and connect the catalyst monitor sensor electrical connectors and heated oxygen sensor electrical connectors before lowering the vehicle.