OEM Chevrolet Silverado 2500 Exhaust Manifold

Chevrolet Silverado 2500 Exhaust Manifold Parts and Q&A

• Exhaust Manifold, Driver Side
  12616285
  Q: How to replace the left exhaust manifold on 4.8L, 5.3L, and 6.0L engines on Chevrolet Silverado 2500?

  A:

  Essential tasks for left Exhaust Manifold replacement on 4.8l, 5.3l, and 6.0l engines include lifting the vehicle while supporting it followed by removing Exhaust Manifold pipe nuts. Begin by lowering the vehicle then unfasten the Spark Plugs followed by Exhaust Manifold bolts then remove the manifold while discarding the gasket. You should eliminate the Exhaust Manifold heat shield bolts before taking away the shield from the Exhaust Manifold. Examine and clean the Exhaust Manifold before further work. Secure the heat shield over the Exhaust Manifold then attach its bolts and secure them to 9 nm (80 inch lbs.). Clean and inspect the threads inside cylinder head Exhaust Manifold bolt hole openings before applying gm p/n 12345493 (Canadian P/N 10953488) thread lock to the first three bolt threads. Use threadlock gm p/n 12345493 (Canadian P/N 10953488) or equivalent to create a 5 mm (0.2 inch) band of product on the Exhaust Manifold bolt threads. Before assembling the Exhaust Manifold wrap a new gasket around it then use bolts which need tightening sequentially from middle to outside while alternating from side to side. Execute the initial bolt tightening to 15 nm (11 ft. Lbs.) before performing a final round of bolt tightening to 25 nm (18 ft. Lbs.) with the same alternating pattern. Use a flat punch to fold the Exhaust Manifold gasket at the rear of the left cylinder head before installing spark plugs. After raising the vehicle please add Exhaust Manifold pipe nuts but make sure they reach 50 nm torque (37 ft. Lbs.), and then lower the vehicle.
• Exhaust Manifold
  12677665
  Q: How to replace the right exhaust manifold on 4.8L, 5.3L, and 6.0L engines on Chevrolet Silverado 2500?

  A:

  A professional must start the right Exhaust Manifold replacement process by lifting then supporting the vehicle before removing Exhaust Manifold pipe nuts. Starting with Spark Plug removal, follow by exhausting the Exhaust Manifold bolts then detach the manifold along with the gasket while discarding the used gasket. You should detach the heat shield bolts along with the shield components from the Exhaust Manifold when required. A correct examination and sanitation of the Exhaust Manifold must occur before its installation. Secure the Exhaust Manifold with the heat shield and bolts by torquing them to 9 nm (80 inch lbs.). The threads in the Exhaust Manifold bolt holes on the cylinder head should be debris-free with no threadlocking material present. Thread folder should not be applied to the first three bolt threads. Apply a 5 mm wide threadlock gm p/n 12345493 (10953488 Canadian P/N) band across the Exhaust Manifold bolt strands. Place the Exhaust Manifold with a new gasket along with bolts in position before torquing them to 15 nm (11 ft. Lbs.) by beginning from the middle bolts and working toward the outer bolts in an alternating side-to-side fashion. A conclusion pass with equal pattern must be done to achieve 25 nm (18 ft. Lbs.) torque value. Use a flat punch to bend down the front Exhaust Manifold gasket at the right cylinder head before installing the spark plugs. Rise the vehicle and add the Exhaust Manifold pipe nuts before tightening them to 50 nm (37 ft. Lbs.) while lowering the vehicle afterwards.