GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Monte Carlo 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 2

Removal Procedure
  1. Turn OFF the ignition.

    2. Object Number: 511633 Size: SH
  2. Disconnect the AIR vacuum hose.

    3. Caution: Allow the engine to cool before servicing the secondary air injection AIR system in order to reduce the chance of severe burns.


    Object Number: 541456 Size: SH
  3. Remove the AIR check valve cross over pipe, the clamps, and the bolt.

    4. Object Number: 511621 Size: SH
  4. Remove the AIR vacuum bleed valve and the bolt.

    5. Object Number: 511623 Size: SH
  5. Remove the AIR check valve nuts.

    6. Object Number: 511629 Size: SH
  6. Remove the AIR check valve rear bracket and nuts.

    7. Object Number: 541459 Size: SH
  7. Remove the AIR check valve pipe adapters.

Installation Procedure

    Object Number: 541459 Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  1. Install the AIR check valve pipe adapters.

    2. Tighten
    Tighten the adapters to 30 N·m (22 lb ft).


    Object Number: 511629 Size: SH
  2. Install the AIR check valve rear bracket and the nuts.

    3. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).


    Object Number: 511623 Size: SH
  3. Install the AIR check valve.

    4. Tighten
    Tighten the AIR check valve to 20 N·m (15 lb ft).

  4. Install the AIR check valve nut.

    5. Tighten
    Tighten the AIR check valve nut to 10 N·m (89 lb in).


    Object Number: 511621 Size: SH
  5. Install the AIR vacuum bleed valve and the bolt.

    6. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 541456 Size: SH
  6. Install the AIR check valve crossover pipe, the clamps, and the bolt.

    7. Tighten
    Tighten the bolt to 10 N·m (89 lb in).


    Object Number: 511633 Size: SH
  7. Connect the AIR vacuum hose.