GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Oldsmobile 🢒 2001 🢒 Aurora 🢒 Engine 🢒 Engine Controls - 3.5L 🢒 Secondary Air Injection Vacuum Check Valve Replacement

Removal Procedure

    Object Number: 256277 Size: SH
  1. Remove the injector sight shield (4) fasteners.
  2. Remove the injector sight shield from the vehicle.

    3. Object Number: 601156 Size: SH
  3. Remove the vacuum lines from the check valve (5).
  4. Remove the check valve.

Installation Procedure

    Object Number: 256277 Size: SH
  1. Install the injector sight shield to the vehicle.

    2. 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.

  2. Install the injector sight shield (4) nuts.

    3. Tighten
    Tighten the nuts to 3 N·m (27 lb in).