OEM 2008 Lincoln Navigator Exhaust Pipe

2008 Lincoln Navigator Exhaust Pipe Parts Questions & Experts Answers

• Q: How to Service and Repair the Exhaust Pipe for a Dual Catalytic Converter on 2008 Lincoln Navigator?

  A: All service and repair operations for the exhaust Y-pipe dual catalytic converter should begin with placing the vehicle in NEUTRAL gear and mounting it on a hoist. First remove the heated oxygen sensor (HO2S) along with catalyst monitor sensor electrical connectors then take out the transmission support crossmember and loosen the exhaust and transmission mounting bracket cap bolt. The exhaust and transmission mounting bracket can be detached from the exhaust Y-pipe dual catalytic converter by removing the three bolts on RWD vehicles. Four-wheel drive (4WD) vehicles need to keep the exhaust and transmission mounting bracket in place until all parts connected to the exhaust Y-pipe dual catalytic converter have been removed and its four bolts must come off. The next step involves removing the both bolts securing the exhaust Y-pipe dual catalytic converter-to-muffler assembly and unfastening the catalytic converter-to-exhaust manifold nuts before disposing of the nuts. The vehicle requires the removal of its exhaust Y-pipe dual catalytic converter while also requiring the exhaust and transmission mounting bracket separation if needed. For additional work, use a wrench to gentle the RH catalytic converter Torca(R) clamp connecting it to the LH catalytic converter before splitting them. Wash all surfaces where the exhaust Y-pipe dual catalytic converter will join the exhaust manifold outlet flare and exhaust Y-pipe dual catalytic converter inlet flares together with the surfaces of the exhaust Y-pipe dual catalytic converter-to-muffler assembly. The RH catalytic converter needs installation into the LH catalytic converter position. During 4WD installation the exhaust and transmission mounting bracket should be reattached to the exhaust Y-pipe dual catalytic converter. Position the exhaust Y-pipe dual catalytic converter into the vehicle before tightening both RH catalytic converter-to-exhaust manifold nuts to 40 Nm (30 lb-ft). To secure the LH inner catalytic converter-to-exhaust manifold nut start by tightening the LH outer nut to 40 Nm (30 lb-ft) before completing with 40 Nm (30 lb-ft) on the LH inner nut. Apply 55 Nm (41 lb-ft) torque when tightening an RH catalytic converter-to-LH catalytic converter Torca(R) clamp that has developed loose. To install the exhaust Y-pipe dual catalytic converter-to-muffler assembly you must fasten both bolts starting from the inner one at 63 Nm (46 lb-ft) and concluding with the outer bolt at 63 Nm (46 lb-ft). The four bolts on 4WD vehicles link the exhaust and transmission mounting bracket to the transmission while reaching a torque level of 90 Nm (66 lb-ft). RWD vehicle owners should slide on the exhaust and transmission mounting bracket before applying three bolts which must be tightened to 90 Nm (66 lb-ft). Finish the installation by securing the exhaust and transmission mounting bracket cap bolt at 35 Nm (26 lb-ft) torque then replace the transmission support crossmember followed by HO2S and catalyst monitor sensor electrical connector reconnection. Verify exhaust system isolators align with zero load and execute the exhaust system alignment procedure when needed.