GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Savana 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Secondary Air Injection Check Valve and Check Valve Pipe Replacement - Bank 2

Removal Procedure

    Object Number: 71686 Size: SH
  1. Remove the retaining bolt from the coolant recovery bottle.
  2. Set the coolant recovery bottle aside.

    3. Object Number: 615707 Size: SH
  3. Disconnect the reactor hose assembly from the reactor pipe by releasing the spring clamp.

    4. Object Number: 615720 Size: SH
  4. Remove the reactor pipe assembly bolts.
  5. Remove the reactor pipe assembly and the gasket.

    6. Object Number: 615724 Size: SH

    Important: Perform this step only if the check valve needs replacement.

  6. Separate the check valve from the reactor pipe by loosening the pipe locknut.

Installation Procedure

    Object Number: 615724 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. Skip the first step if the check valve has not been removed.

    2. Connect the reactor pipe and check valve by installing the pipe locknut.

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


    Object Number: 615720 Size: SH

    Important: Clean the manifold mounting surfaces of any debris or carbon buildup. An airhole could adversely effect vehicle emissions and driveability.

  2. Install the reactor pipe and gasket.
  3. Install the reactor pipe assembly bolts.

    4. Tighten
    Tighten the reactor pipe bolts to 25 N·m (18 lb ft).


    Object Number: 615707 Size: SH
  4. Connect the reactor hose assembly to the reactor pipe by installing the spring clamp.

    5. Object Number: 71686 Size: SH
  5. Install the coolant recovery bottle using the retaining bolt.

    6. Tighten
    Tighten the mounting bolt to 11 N·m (97 lb in).