OEM 2001 Buick Century Exhaust Manifold

2001 Buick Century Parts Questions & Experts Answers

• Q: How to replace the right exhaust manifold (3.1L) on 2001 Buick Century?

  A: You must begin the right Exhaust Manifold (3.1L) replacement by disconnecting the battery ground cable followed by taking off the throttle body air inlet duct and the exhaust crossover pipe heat shield. Proceed by removing the exhaust crossover pipe nuts which are connected to the right Exhaust Manifold then disconnect the heated Oxygen Sensor (H02S) wiring harness connector. Support the vehicle and disconnect the three-way catalytic converter pipe together with the exhaust gas recirculation (EGR) tube from the right Exhaust Manifold. First disconnect the nuts securing the heat shields and their components from the upper and lower positions before removing each element along with the gasket and then the right Exhaust Manifold. The technicians will prepare the right Exhaust Manifold sealing surfaces alongside the removal of the heated Oxygen Sensor (H02S). The first installation step includes placing the heated Oxygen Sensor (H02S) and right Exhaust Manifold gasket before installing the right Exhaust Manifold. Install the lower heat shield while securing its bolts to 10 nm (89 inch lbs.) before tightening the right Exhaust Manifold bolts to 16 nm (12 ft. Lbs.). Connect the upper heat shield to its bolts while torquing them to 10 nm (89 inch lbs.). Reconnect the EGR Tube while joining the three-way catalytic converter pipe with the right Exhaust Manifold. Following the heated Oxygen Sensor (H02S) wiring harness connector reconnection the exhaust crossover pipe nuts need to be installed before raising the vehicle to its original height. For the final step reinstall the exhaust crossover pipe heat shield together with the throttle body air inlet duct followed by reconnecting the battery ground (negative) cable.