OEM Buick Enclave Exhaust Manifold

Buick Enclave Exhaust Manifold Parts and Q&A

• Exhaust Manifold
  12571100
  Q: How to replace the left side exhaust manifold on Buick Enclave?

  A:

  The procedure to replace the left side Exhaust Manifold starts by removing two components: Exhaust Manifold heat shield followed by oil level indicator and Catalytic Converter. Disassemble the Exhaust Manifold bolts without gasket reuse before proceeding to extract the Exhaust Manifold component along with the gasket which needs discarding. The heated Oxygen Sensor should be detached from the Exhaust Manifold. The threads of reused sensors require coating with gm p/n 12377953 anti-seize compound or equivalent product. Fasten the ho2s onto the Exhaust Manifold by tightening it to 42 nm (31 lb ft). You should install one Exhaust Manifold bolt to its respective slot on the Exhaust Manifold before setting the new Exhaust Manifold Gasket to the manifold and bolting it into place. Install the Exhaust Manifold with gasket on the Cylinder Head while also connecting the Catalytic Converter before torquing all Exhaust Manifold bolts to 20 nm (15 lb ft). Begin with Catalytic Converter installation followed by the oil level indicator then install the Exhaust Manifold heat shield.
• Exhaust Manifold, Passenger Side
  12588987
  Q: How to replace the right side exhaust manifold on Buick Enclave?

  A:

  The process of right side Exhaust Manifold replacement starts with removing both the Catalytic Converter and Exhaust Manifold heat shield. Secure the process by removing Exhaust Manifold bolts from the assembly while presenting the decision to retain new gaskets. The technicians should remove the Exhaust Manifold followed by gasket discard. Start the installation by fastening one Exhaust Manifold bolt to the Exhaust Manifold before laying a new Exhaust Manifold gasket onto the Cylinder Head and bolting it. Fasten the Exhaust Manifold together with its gasket to the combination of Catalytic Converter and Cylinder Head while paying attention to the manufacturer-provided fastener guideline. The technician will fasten the Exhaust Manifold bolts at 20 n.m (15 lb ft) then reinstall the Exhaust Manifold heat shield before securing the Catalytic Converter.