OEM 2008 Lincoln MKZ Exhaust Manifold

2008 Lincoln MKZ Exhaust Manifold Parts Questions & Experts Answers

• Q: How to service and repair the LH exhaust manifold on 2008 Lincoln MKZ?

  A: Start the LH exhaust manifold servicing and repairing operation by removing the LH catalytic converter followed by the LH heated oxygen sensor (HO2S). Begin by disassembling the LH exhaust manifold heat shield with 3 bolts then continue with the removal of 6 nuts that hold the LH exhaust manifold until you discard that combination with the gasket. The LH exhaust manifold requires cleaning before examination. The technician then removes and discards both the 6 LH exhaust manifold studs. The sealing surfaces require cleaning exclusively with plastic scrapers while following the packaging instructions to clean the exhaust manifold mating surface of the cylinder head by using metal surface prep. The use of metal scrapers and wire brushes along with abrasive tools must be avoided because they can produce leaks through scratches and gouges on the sealing surfaces. The installation procedure includes mounting 6 new LH exhaust manifold studs which need to be tightened to 12 Nm (9 lb-ft). A second round of proper torque specification must be applied to exhaust manifold nuts to stop exhaust leaks from occurring. An installer should apply two rounds of torque on the 6 new nuts after mounting the LH exhaust manifold. The first stage requires a torque of 20 Nm (15 lb-ft) followed by a second stage at 20 Nm (15 lb-ft). The LH exhaust manifold heat shield requires installation using 3 bolts tightened to 14 Nm (10 lb-ft) after which the LH HO2S and LH catalytic converter should be installed.