OEM 2002 Buick Park Avenue Exhaust Manifold

2002 Buick Park Avenue Parts Questions & Experts Answers

• Q: How to replace the right exhaust manifold (W/NC8) on 2002 Buick Park Avenue?

  A: Begin right Exhaust Manifold (W/NC8) replacement by taking out the fuel injector sight shield followed by disconnecting the heated Oxygen Sensor at its sensor pigtail and extracting the right side spark plugs. The next step involves disconnecting the secondary air valve tubing components until you can remove the two secondary air tube bolts. During this process discard the gasket because it needs replacement. Tear off the bolt restraining the secondary air valve from its mounting position on the fuel injector sight shield bracket and separate the valve from its bracket. Separate the two nuts from the power brake booster heat shield that fasten to the exhaust crossover before removing the heat shield itself. Unfasten the two bolts which connect the exhaust crossover to the right Exhaust Manifold and afterward detach the transaxle filler tube. Support the vehicle when elevated and unfasten both the Exhaust Manifold pipe and right Exhaust Manifold studs. It is possible to remove the heated Oxygen Sensor before proceeding to unscrew the retaining nuts from the sight shield bracket. Next, gather the necessary tools to detach the bracket. First remove fasteners that anchor the right engine lift bracket together with the bracket itself before dissolving the bolt which holds the egr inlet pipe to the right Exhaust Manifold. Remove both retaining fasteners from the right Exhaust Manifold and detach the component with its gasket which needs replacement. Clean the right Exhaust Manifold before installation. Position first a new exhaust crossover seal over the exhaust crossover and then position a new Exhaust Manifold Gasket over the cylinder head studs. Place the right Exhaust Manifold around the exhaust crossover until it reaches the right cylinder head and fasten the various right Exhaust Manifold fasteners to 30 nm (22 ft. Lbs. Torque spec). Secure the egr inlet pipe to the right Exhaust Manifold through the bolt with 30 nm (22 ft. Lbs.) torque specification. Fit the right engine lift bracket onto the engine while adding retaining fasteners that need to be tightened to 30 nm (22 ft. Lbs.). Mount the fuel injector sight shield bracket onto the engine structure and secure its retaining nuts by tightening them to 30 nm (22 ft. Lbs.). Use right Exhaust Manifold studs before tightening them to 9 nm (80 inch lbs.) and add the heated Oxygen Sensor followed by the Exhaust Manifold pipe. After lowering the vehicle position the transaxle filler tube then bolt the exhaust crossover in place to the right Exhaust Manifold while tightening all fasteners to 20 nm (15 ft. Lbs.). Reposition the power brake booster heat shield on top of the exhaust crossover while using two nuts which should be tightened to 20 nm (15 ft. Lbs.). Position the secondary air valve at the fuel injector sight shield bracket before installing the bolt while tightening it to 25 nm (18 ft. Lbs.). Install a new gasket at the secondary air tube before attaching it with two bolts tightened to 10 nm (89 inch lbs.). The secondary air valve receives the hose and connector while the right side spark plugs get installed along with the heated Oxygen Sensor at its pigtail and the fuel injector sight shield.