OEM 2008 Cadillac Escalade Exhaust Manifold

2008 Cadillac Escalade Exhaust Manifold Parts and Q&A

• Q: How to replace the right side exhaust manifold on 2008 Cadillac Escalade?

  A: The first step for replacing right side Exhaust Manifold requires removal of the heated Oxygen Sensor (HO2S). The vehicle requires complete support through proper lifting. The first step is to remove nuts that hold the Catalytic Converter to the Exhaust Manifold (1500 series is displayed but the procedure for 2500 series is comparable). Play the front wheel house liner from the right side before lowering the vehicle partially to access the wheel opening. Twisting each Spark Plug wire boot half an inch should allow you to pull out the boot so you can access the Spark Plug. To service ignition coils you should disconnect their Spark Plug Wires in a specific method. First remove the engine block oil level indicator tube then proceed with Exhaust Manifold bolt removal and Exhaust Manifold separation. The entire Exhaust Manifold Gasket along with its sealing component needs to be thrown away. To replace the Exhaust Manifold it is necessary to disassemble the heat shield by removing its bolts and releasing it from position. Before attaching the Exhaust Manifold heat shield install it in position then tighten the bolts to 9 nm (80 lb in). Apply threadlock gm p/n 12345493 (Canadian P/N 10953488) to the Exhaust Manifold bolts as a 5 mm (0.2 in) thick strip around the threads after cleaning their surface. At first install a new Catalytic Converter seal while positioning the new Exhaust Manifold Gasket and Exhaust Manifold to the Cylinder Head with attention to seating the Catalytic Converter seal. Install the center Exhaust Manifold bolts with 15 nm torque before working from side to side then finish them at 20 nm. The gasket tab needs to be folded with a flat punch at the Cylinder Head edge. The technician should reinstall the oil level indicator tube while carefully positioning Spark Plug Wires and ignition coils into their connectors through sideward pushing for proper seating verification of each connector boot. Raise and support the vehicle to its full height before installing the Catalytic Converter to Exhaust Manifold nuts which should be tightened up to 50 nm (37 lb ft). The procedure includes lowering the vehicle to access the wheel opening then reinstalling the right-front front wheel house liner before completing the installation with the ho2s and exhaust leak inspection.