Q: How to service and repair the right-hand (RH) exhaust manifold on Lincoln MKZ?
A: You must detach the RH heated oxygen sensor (HO2S) electrical connector followed by removing the RH catalytic converter to work on repairing or servicing the RH exhaust manifold. The six nuts connecting the RH exhaust manifold require removal before you should dispose of both parts along with their gasket. First clean the RH exhaust manifold followed by inspections before discarding the six RH exhaust manifold studs. The service requires using only a plastic scraper to avoid surface damage while following metal surface prep instructions for suitable cleaning of the exhaust manifold mating surface on the cylinder head. You should use six new RH exhaust manifold studs which must be tightened to 12 Nm (9 lb-ft). Preventing leakages in the exhaust depends on performing a proper torque relap of the exhaust manifold nuts before final tightening. The RH exhaust manifold needs installation with new gaskets then you should fasten it with six new nuts while applying 20 Nm (15 lb-ft) torque first and repeating the torque to 20 Nm (15 lb-ft). Complete installation by reconnecting the RH HO2S electrical connector before reinstalling both the right-hand catalytic converter.
Q: How to service the right exhaust manifold on Lincoln Town Car?
A: Before starting to service the right exhaust manifold you should place the vehicle in neutral position on a hoist. Make the following steps to remove the drive belt: detach the battery's black negative cable followed by a clockwise rotation of the drive belt tensioner. Detach the crankshaft position (CKP) sensor electrical connector along with the electrical connector from the A/C compressor. Start by taking off the bolt from the transmission cooler tube bracket before removing the nut to set the assembly aside with the tube. Begin by removing three bolts that will position the A/C compressor to a side position before removing the catalytic converter-to-exhaust manifold nuts to set aside the catalytic converter flange. The process ends with removing the eight nuts from the exhaust manifold along with a new gasket and discarding all components. To install this component first place an exhaust manifold gasket together with the exhaust manifold then secure the unit with eight nuts using a tightening sequence of 25 Nm (18 ft. lbs.). Position the catalytic converter flange while installing the catalytic converter-to-exhaust manifold nuts which need tightening to 34 Nm (25 ft. lbs.). First install the A/C compressor using bolts that reach 25 Nm torque before placing the transmission cooler tube assembly and nut with proper torque of 9 Nm. Fasten the transmission cooler tube bracket bolt to 15 Nm torque before tightening it to 11 ft. lbs. Reinstall the A/C compressor electrical connector together with the CKP sensor electrical connector. Lock the drive belt tensioner clockwise direction and install the drive belt before reconnecting the negative terminal cable.
Q: How to service the right-hand exhaust manifold on Lincoln Navigator?
A: Before reaching the right-hand exhaust manifold for servicing you must start by disconnecting the battery ground cable then supporting the vehicle. Remove first the two Y pipe nuts and lower the vehicle partially. The right front wheel and tire assembly needs removal before proceeding to remove the right front fender splash shield. Remove the harness bolt that secures the starter cable before placing the cable to the side. The eight nuts on the exhaust manifold need to be removed before taking out the exhaust manifold together with the gasket. Install new gaskets when you install the system while performing the removal process in reverse order.