OEM Buick Park Avenue Exhaust Manifold

Buick Park Avenue Exhaust Manifold Parts and Q&A

• Exhaust Manifold, Driver Side
  24504379
  Q: How to service and repair the exhaust manifold on Buick Park Avenue?

  A:

  The egr outlet pipe needs leak testing before right-hand Exhaust Manifold removal because a diagnostic failure prompts new egr adapter replacement. Start the service by removing the negative Battery Cable. Begin by removing Spark Plug Wires from the Spark Plugs followed by unhooking the transmission oil level indicator together with its tube. You should start by taking off the oxygen sensor electrical connector followed by the two bolts fastening the right Exhaust Manifold to the crossover pipe. Raise and support the vehicle properly before taking out the front exhaust pipe from the Exhaust Manifold. Workers should start by lowering the vehicle before taking out the engine lift bracket and Exhaust Manifold studs then removing the Exhaust Manifold. Tear down the Exhaust Manifold installation by connecting it to the Cylinder Head and inserting all Exhaust Manifold studs and bolts then tighten them to 30 nm (22 ft. Lbs.). The front exhaust pipe should be installed onto the Exhaust Manifold after reattaching the engine lift bracket and raising the vehicle. Reduce the height of the vehicle while tightening the crossover pipe to the right Exhaust Manifold bolts to 20 nm (15 ft. Lbs.). You should complete the installation process by putting back the oxygen sensor electrical connector followed by the transmission oil level indicator and indicator tube then adding the throttle cable bracket and wire the Spark Plug wires to their spark plugs before connecting the negative Battery Cable.
• Exhaust Manifold, Passenger Side
  24503920
  Q: How to replace the right exhaust manifold (W/NC8) on Buick Park Avenue?

  A:

  The right Exhaust Manifold replacement (W/NC8) starts with removing the fuel injector sight shield followed by disconnection of the heated Oxygen Sensor at its sensor pigtail. Start by disassembly of right side Spark Plugs before disconnecting the connector along with hose from the secondary air valve while taking out its two securing bolts which attach the secondary air tube to the Exhaust Manifold. Remove the secondary air tube while discarding the gasket from the operation. Unfasten the bolt which supports the secondary air valve at the fuel injector sight shield bracket before removing the valve. Use a socket to remove the two nuts which hold the power brake booster heat shield to the exhaust crossover and detach the heat shield. To perform this operation first remove two bolts holding the exhaust crossover to the right Exhaust Manifold after which you must remove the transaxle filler tube. After supporting the vehicle with stands you can uninstall both the right Exhaust Manifold studs along with the Exhaust Manifold pipe. First remove the heated Oxygen Sensor if needed before extracting the fuel injector sight shield bracket retaining nuts and bracket from its position. Unfasten both retaining fasteners securing the right engine lift bracket and then separate the bracket from the unit. Begin by taking out the bolt which holds the egr inlet pipe to the right Exhaust Manifold before proceeding to uninstall right Exhaust Manifold fasteners and removing the right Exhaust Manifold with its gasket. Keep the original gasket intact for disposal. Clean up and check the right Exhaust Manifold before placing an exhaust crossover seal above the exhaust crossover then installing a new Exhaust Manifold gasket over the cylinder head studs. Put the Exhaust Manifold into position around the exhaust crossover while moving it towards the right cylinder head and install the fasteners before tightening them to 30 nm (22 ft. Lbs.). Apply bolt on the egr inlet pipe to the right Exhaust Manifold followed by tightening it to 30 nm (22 ft. Lbs.). Mount the right engine lift bracket to the engine base before torquing its retaining fasteners to 30 nm (22 ft. Lbs.). Fasten the fuel injector sight shield bracket onto the engine surface while tightening its retaining nuts to 30 nm (22 ft. Lbs.). Insert right Exhaust Manifold studs before tightening them to 9 nm (80 inch lbs.) and place the heated Oxygen Sensor and Exhaust Manifold pipe. The vehicle should be placed into a lower position to install the transaxle filler tube. The bolts connecting exhaust crossover to right Exhaust Manifold need 20 nm (15 ft. Lbs.) torque until tightly installed followed by attaching the power brake booster heat shield with two nuts into 20 nm (15 ft. Lbs.). The secondary air valve requires installation on the fuel injector sight shield bracket followed by attaching the 25 nm (18 ft. Lbs.) bolt. A new gasket should be applied to the secondary air tube before two bolts secure its attachment to the Exhaust Manifold with a torque of 10 nm (89 inch lbs.). To complete the procedure, users must connect the hose and the connector to the secondary air valve while installing the right side spark plugs and connecting the heated Oxygen Sensor through the sensor pigtail before replacing the fuel injector sight shield.