GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1998 🢒 DeVille 🢒 Engine 🢒 Engine Controls - 4.0L and 4.6L 🢒 Exhaust Gas Recirculation Valve Replacement

Removal Procedure
  1. Disconnect the electrical connector from the solenoid.
  2. Remove the fuel line bracket nut, if equipped.
  3. Lift the fuel line bracket off the stud, if equipped.
  4. Push fuel line bracket away from the EGR valve base, if equipped.
  5. Remove the mounting nuts and/or bolts from the base of the EGR valve.
  6. Remove the EGR Valve.
    7. • Inspect the EGR passages in the crossover water pump housing for deposits.
    • Clean the EGR passages as needed. Refer to Exhaust Gas Recirculation (EGR) System Cleaning .
  7. Clean the mounting surface for the EGR valve.

Installation Procedure
  1. Install cleaned or replacement EGR valve using a new gasket.

    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 two mounting nuts and/or bolts at the EGR valve base.

    3. Tighten
    Tighten the 2 mounting nuts and/or bolts to 24 N·m (18 lb ft).

  3. Place the fuel line bracket onto the EGR valve stud, if equipped.
  4. Install the fuel line bracket nut, if equipped.

    5. Tighten
    Tighten the 1 bracket nut to 19 N·m (14 lb ft), if equipped.

  5. Connect the electrical connector to EGR solenoid.