OEM 2004 Buick Regal Exhaust Manifold

2004 Buick Regal Exhaust Manifold Parts and Q&A

• Q: How to replace the left exhaust manifold on 2004 Buick Regal?

  A: The procedure for left Exhaust Manifold replacement starts with the negative Battery Cable and includes removal of the fuel injector sight shield and engine mount struts together with the lower right engine mount strut bracket. Begin the procedure by removing exhaust crossover pipe bolts from the left Exhaust Manifold then moving on to remove left spark plugs from cylinders 1, 3, and 5. Before finishing remove the oil level indicator tube. Start the procedure by removing the nut and bolt which holds down the engine lift bracket on its left side. Once these components come off the bracket can easily be removed. The Exhaust Manifold process starts with removing heat shield nuts and the heat shield before using Exhaust Manifold bolts and nuts to remove both components and the gasket. The technician should clean and inspect the left Exhaust Manifold before installing both a new gasket and the Exhaust Manifold itself. Tighten up the Exhaust Manifold bolts and nuts to 30 nm (22 ft. Lbs.) before installing the Exhaust Manifold heat shield along with its corresponding nuts that need to be tightened to 20 nm (15 ft. Lbs.). The engine lift bracket installation requires securing the bolt and nut to 30 nm (22 ft. Lbs.) while the oil level indicator tube and left spark plugs in cylinders 1, 3, and 5 receive placement before the exhaust crossover bolts receive 20 nm (15 ft. Lbs.) tightening to the left Exhaust Manifold. To complete the repair install the lower right engine mount strut bracket as well as engine mount struts and fuel injector sight shield before connecting the negative Battery Cable.