OEM 2006 Buick Lucerne Exhaust Manifold

2006 Buick Lucerne Exhaust Manifold Parts and Q&A

• Q: How to replace the right exhaust manifold (RPO L26) on 2006 Buick Lucerne?

  A: The right Exhaust Manifold replacement (RPO L26) starts with intake manifold cover removal along with extraction of right side spark plugs. Connect the engine harness electrical connector from the heated Oxygen Sensor (HO2S) while pulling the ho2s pigtail clip from the sight shield bracket. The Exhaust Manifold ho2s must be extracted before disabling the power brake booster heat shield links and dislodging the heat shield. Start by removing exhaust crossover studs which fasten the right Exhaust Manifold before extracting the transaxle fill tube and Catalytic Converter. Begin engine repair by uninstalling sight shield bracket nuts together with the bracket before removing right engine lift bracket bolt and nut and the engine lift bracket. The process starts with bolts removal from the Exhaust Manifold heat shield followed by removing the shield and egr valve adapter pipe bolt then taking out the Exhaust Manifold through stud and nut removal. The service technician should dispose of both the Exhaust Manifold Gasket along with the exhaust crossover pipe seal. The installation procedure begins with affixing an existing new exhaust crossover pipe seal onto the Exhaust Manifold followed by the installation of a new Exhaust Manifold Gasket before positioning the Exhaust Manifold. Fitting the Exhaust Manifold begins with stud installation and subsequent tightening of each stud to 30 nm (22 ft. Lbs.) while nuts reach a torque of 25 nm (18 ft. Lbs.). Fasten the egr valve adapter pipe bolt with proper torque to 25 nm (18 ft. Lbs.). Install the Exhaust Manifold heat shield with its bolts while torquing them to 10 nm (89 inch lbs.). First install the engine lift bracket with right engine lift bracket bolt then nut to 25 nm (18 ft. Lbs.) and continue installation with the sight shield bracket nuts and bracket at 30 nm (22 ft. Lbs.). After reinstalling the transaxle fill tube and Catalytic Converter the technician must attach the exhaust crossover studs to the right Exhaust Manifold before tightening them to 18 nm (13 ft. Lbs.). Fasten the power brake booster heat shield with nuts that reach 20 nm strength (15 ft. Lbs.). Before ho2s installation into the Exhaust Manifold use gm p/n 12377953 anti-seize compound (either original or equivalent compound) and retain the specified torque value of 42 nm (31 ft. Lbs.). The engine harness should be connected to the ho2s before securing the ho2s pigtail clip to the sight shield bracket while replacing the right side spark plugs and the intake manifold cover.