OEM Chevrolet Avalanche 2500 Exhaust Manifold

Chevrolet Avalanche 2500 Exhaust Manifold Parts and Q&A

• Exhaust Manifold
  12677665
  Q: How to remove and install the right exhaust manifold on an 8.1L engine on Chevrolet Avalanche 2500?

  A:

  The removal process of right Exhaust Manifold from an 8.1l engine starts with wheelhouse panel and oil level indicator elimination. Grasp only the boot and rotate it clockwise one-half turn until it breaks loose. After that, pull the boot separately to protect the Spark Plug wire and plug from damage. The next step requires removing the Spark Plug Wires from both spark plugs and coils before pulling out the spark plugs. Begin by raising the vehicle to support its weight and continue by removing the heat shield bolts followed by the nuts and finally remove the heat shield. Lower the vehicle after which remove the Exhaust Manifold bolts then the nuts before taking out the manifold. The installation process starts with discarding the old Exhaust Manifold Gasket while cleaning and examining the manifold surface. You must first set the new Exhaust Manifold Gasket before mounting the Exhaust Manifold. Fasten the bolt to 35 nm (26 ft. Lbs.) while the nuts should be tightened to 16 nm (12 ft. Lbs.). Raising the vehicle to a proper height, mount the heat shield before tightening bolt and nuts to 25 nm (18 ft. Lbs.). The installation requires operators to first lower the vehicle and then fit spark plugs by pushing Spark Plug Wires directly onto Spark Plug boots without depending on metal heat shield usage. After wiring the Spark Plug Wires onto spark plugs and Ignition Coils, you should install the oil level indicator before placing the wheelhouse panel back in position.
• Exhaust Manifold, Driver Side
  12616285
  Q: How to replace the left exhaust manifold on Chevrolet Avalanche 2500?

  A:

  The first step for replacement of the left Exhaust Manifold involves removal of the wheelhouse panel. A one-half turn clockwise twist on the Spark Plug boot will let you release it and you should grip only the boot portion to protect the wire. To begin pull off the Spark Plug Wires from both the spark plugs and Ignition Coils. Then continue by removing the spark plugs. First raise and support the vehicle before removing the bolts and nuts from the Exhaust Manifold heat shield to separate the left Exhaust Manifold heat shield from its position. The work sequence begins by lowering the vehicle before experts remove Exhaust Manifold bolts and nuts to finally extract the Exhaust Manifold from position. Dispose of the old Exhaust Manifold Gasket along with checking the manifold for reuse only if the condition allows. Use a new gasket to mount the Exhaust Manifold before tightening the Exhaust Manifold bolt to 35 nm (26 ft. Lbs.) and the nuts to 16 nm (12 ft. Lbs.). After another vehicle lift you can install the Exhaust Manifold heat shield using proper bolt and nut arrangement which requires tightening to 25 nm (18 ft. Lbs.). Use the vehicle hoist to lower it down before inserting spark plugs and taking care to completely install the Spark Plug wire by pushing on its exposed boot section rather than using metal heat shields. Reinstall the wheelhouse panel while connecting the Spark Plug wires to both spark plugs and ignition coils.