GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Engine 🢒 Engine Cooling 🢒 Crankcase Vent Housing Replacement

Removal Procedure
  1. Remove the following components according to the RPO code:
    2. • LHD
       - The air inlet grill panel. Refer to Air Inlet Grille Panel Replacement in Body Front End.
       - The fasteners securing the front air inlet panel assembly to the battery tray and cowl.
       - The front air inlet panel assembly from the vehicle.
    • RHD
    • The wiper motor module. Refer to Windshield Wiper System Module Replacement in Wipers/Washer Systems.

    Object Number: 785822 Size: SH
  2. Disconnect the electrical connector (2) from the coil pack (1).

    3. Object Number: 785788 Size: SH
  3. Remove the heated oxygen sensor connector (1) from the bracket (3).
  4. Remove the bolt securing the surge tank outlet pipe to the vent housing-LHD ONLY.

    5. Object Number: 821095 Size: SH
  5. Disconnect the following from the crankcase vent housing (4):
    6. • The crankcase ventilation fresh air hose (2)
    • The crankcase ventilation dirty air hose (3)
    • The engine wiring harness push retainer
  6. Remove the bolt (6) securing the following to the crankcase vent housing (4):
    7. • The heated oxygen sensor connector bracket (5)
    • The evaporative emission (EVAP) canister purge valve bracket (1)

    Object Number: 821097 Size: SH
  7. Remove the crankcase vent housing bolts.
  8. Remove the crankcase vent housing from the engine block.
  9. Plug the open ports to the crankcase, in order to prevent foreign objects from entering the engine.
  10. Clean and inspect the surface of the engine block and crankcase vent housing.

Installation Procedure

    Object Number: 821098 Size: SH
  1. Apply a 3 mm (0.12 in) bead of sealant GM P/N 1052942 (Canadian P/N 10953466) to the groove of the crankcase vent housing.
  2. Remove the plugs from the crankcase ports.

    3. Object Number: 821097 Size: SH
  3. Position the crankcase vent housing to the engine block.

    4. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the crankcase vent housing bolts.

    5. Tighten
    Tighten the crankcase vent housing bolts to 8 N·m (71 lb in).


    Object Number: 821095 Size: SH
  5. Install the bolt (6) securing the following to the crankcase vent housing (4):
    6. • The EVAP canister purge valve bracket (1)
    • The heated oxygen sensor connector bracket (5)

    Tighten
    Tighten the EVAP canister purge valve bracket bolt to 8 N·m (71 lb in).

  6. Connect the following to the crankcase vent housing (4):
    7. • The crankcase ventilation fresh air hose (2)
    • The crankcase ventilation dirty air hose (3)
    • The engine wiring harness push retainer

    Object Number: 785788 Size: SH
  7. Install the heated oxygen sensor connector (1) to the bracket (3).
  8. Install the bolt securing the surge tank outlet pipe to the vent housing-LHD ONLY.

    9. Tighten
    Tighten the surge tank outlet pipe to vent housing bolt to 9 N·m (80 lb in).


    Object Number: 785822 Size: SH
  9. Connect the electrical connector (2) to the coil pack (1).
  10. Install the following components according to the RPO code:
    11. • LHD
       - Position the front air inlet panel assembly to the battery tray and cowl.
       - Install the fasteners securing the front air inlet panel assembly to the battery tray and cowl.

    Tighten
    Tighten the front air inlet panel assembly fasteners to 6 N·m (53 lb in).

       - The air inlet grill panel. Refer to Air Inlet Grille Panel Replacement in Body Front End.
    • RHD
    • The wiper motor module. Refer to Windshield Wiper System Module Replacement in Wipers/Washer Systems.