GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2001 🢒 Century 🢒 Engine 🢒 Engine Electrical 🢒 Exhaust Gas Recirculation Pipe Replacement

Removal Procedure
  1. Turn OFF the ignition.

    2. Object Number: 621066 Size: SH
  2. Remove the bolt retaining the pipe assembly from the EGR valve and carefully pull the pipe assembly back.
  3. Unscrew the EGR pipe assembly nut from the exhaust manifold.
  4. Remove the EGR pipe.

Installation Procedure

    Object Number: 621066 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 EGR valve pipe to the exhaust manifold.

    2. Tighten
    Tighten the EGR pipe nut to 25 N·m (18 lb ft).

  2. Install the EGR pipe bolt to the EGR valve.

    3. Tighten
    Tighten the EGR pipe bolt to 25 N·m (18 lb ft).