OEM Cadillac Escalade EXT Exhaust Manifold

Cadillac Escalade EXT Exhaust Manifold Parts and Q&A

• Exhaust Manifold, Driver Side
  12616285
  Q: How to replace the right exhaust manifold on 4.8L, 5.3L, and 6.0L engines on Cadillac Escalade EXT?

  A:

  You need to begin the right Exhaust Manifold change procedure for 4.8l, 5.3l, and 6.0l engines by taking off the Ignition Coils along with the Spark Plugs. Start by elevating the vehicle and then remove the nuts on the Exhaust Manifold pipes. Lower the vehicle so you can remove the Exhaust Manifold bolts and manifold and gasket which you should discard the gasket. The Exhaust Manifold requires heat shield bolts removal to eliminate both the shield attachment parts from the Exhaust Manifold. When keeping the Exhaust Manifold you must inspect and clean it thoroughly. You should attach the heat shield along with its bolts to the Exhaust Manifold only when needed then tighten the bolts to 9 nm (80 inch lbs.). Proper bolt torque on the Exhaust Manifold will stop vehicle emission issues and ensure correct on-board diagnostics (OBD) ii system operation and check that all bolt holes have smooth threads without debris but avoid applying sealant to the first three threads on the bolt. Wrap the boundary of the Exhaust Manifold bolt threads with threadlocker gm p/n 12345493 (Canadian P/N 10953488) or equivalent material to the extent of 5 mm (0.2 inches). Install the Exhaust Manifold and new gasket before tightening the bolts starting from the middle of the two then moving to opposite sides until reaching the outside bolts. Finish the tightening at 25 nm (18 ft. Lbs.) using the same pattern. Use a flat punch to bend the Exhaust Manifold Gasket exposed edges at the front of the right cylinder head. The installation continues by raising the vehicle and installing Exhaust Manifold pipe nuts which should be tightened to 50 nm (37 ft. Lbs.) followed by vehicle lowering.
• Exhaust Manifold
  12677665
  Q: How to remove and install the left exhaust manifold on Cadillac Escalade EXT?

  A:

  The first step to remove the left Exhaust Manifold requires Ignition Coil removal followed by Spark Plug extraction before raising and suspending the vehicle. After lowering the vehicle users can reach the Exhaust Manifold bolts as well as the manifold and gasket to remove them while discarding the components. Under rare circumstances you must detach heat shield bolts as well as shield pieces from the Exhaust Manifold. Inspect and clean the Exhaust Manifold only when the replacement is not required. You should connect heat shield along with bolts onto Exhaust Manifold unless otherwise required then torque all bolts to 9 nm (80 inch lbs.). Proper installation of Exhaust Manifold bolts will avoid emissions problems while clean threads remain present in the cylinder head Exhaust Manifold bolt holes. Avoid applying any sealant compound to the first three threads of each bolt. A 5 mm (0.2 inch) band of threadlock gm p/n 12345493 (Canadian P/N 10953488) should be applied to each Exhaust Manifold bolt thread before installing the Exhaust Manifold and new gasket with the bolts. Begin by tightening the center two bolts while alternating from side to side until they reach 15 nm (11 ft. Lbs.). Then finish up by torquing all bolts to 25 nm (18 ft. Lbs.) by following the same side-to-side pattern. If you position a flat punch on the exposed gasket at the rear of the left cylinder head then raise the vehicle you can install the Exhaust Manifold pipe nuts by torquing them to 50 nm (37 ft. Lbs.). At the end of the process you should lower the vehicle before putting the spark plugs and ignition coils back in place.