OEM 2003 Cadillac CTS Exhaust Manifold

2003 Cadillac CTS Exhaust Manifold Parts and Q&A

• Q: How to replace the left exhaust manifold on 2003 Cadillac CTS?

  A: The first step to replace the left Exhaust Manifold is to remove the accessory mounting bracket followed by disconnecting the heated Oxygen Sensor pigtail from its wiring harness connector. The next step involves removing both the left Catalytic Converter along with any needed replacement of the heated Oxygen Sensor. Before proceeding you should remove the left Exhaust Manifold retaining nuts and detach the left Exhaust Manifold with its gasket while keeping the gasket new. Inspection and cleaning must happen to the left Exhaust Manifold before installing it. New Exhaust Manifold gaskets should be installed over the cylinder head studs while placing the left Exhaust Manifold onto its corresponding cylinder head. Screw in the left Exhaust Manifold retaining nuts before tightening them to 20 nm (15 ft. Lbs.). Position the heated Oxygen Sensor followed by the left Catalytic Converter if they were previously removed. You should connect the heated Oxygen Sensor pigtail to the wiring harness connector before replacing the accessory mounting bracket.