Oil Pump And Front Cover Removal

TOOLS REQUIRED: 

• SA9104E Front Crank Seal Replacer
• SA9123E Gasket Seal Cutter

1. Disconnect negative battery cable.
2. Jack vehicle, or raise vehicle on a hoist.
   Fig 1: Vehicle Support Points

   Courtesy of GENERAL MOTORS CORP.
3. Drain engine oil.
4. Remove the right wheel and splash shield.
   Fig 2: Splash Shield

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Installation of the wood block prior to upper engine torque axis mount removal allows the mount to be easily installed without lifting or jacking the powertrain.
5. Place a 1 in. x 1 in. x 2 in. long block of wood between the torque strut and cradle.
   Fig 3: Removing Engine Accessory Drive Belt

   Courtesy of GENERAL MOTORS CORP.
6. Remove engine accessory drive belt.
   NOTE: The crankshaft vibration damper/pulley bolt head and washer prevents oil leakage from the cavity around the end of crankshaft.
   NOTE: Do not pry against the cover.
7. Remove front crankshaft vibration damper/pulley assembly. Hold damper with a strap wrench when removing bolt.

   Puller jaw slots are cast into the dampener/ pulley assembly for removal with a small three-jaw puller, if required.

   Fig 4: Removing Front Crankshaft Vibration Damper/Pulley Assembly

   Courtesy of GENERAL MOTORS CORP.
   NOTE: The accessory drive belt idler pulley must be removed to allow the front cover to be removed and replaced in the vehicle.
   NOTE: It is not necessary to remove the power steering pump for access to the bracket attachment bolts. The DOHC (LLO) engine has an additional bracket located under the pump and the attachment bolt can be accessed through an oval hole in the pump's pulley.
8. Remove the power steering pump assembly and position it on the intake manifold.
   Fig 5: Power Steering Pump Assembly

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Cover camshaft area whenever repairs are not.
9. Remove the belt tensioner.

   IMPORTANT:  Cover camshaft area whenever repairs are not being performed to prevent foreign debris from entering engine.

10. Remove the cam cover (DOHC [LLO]) engine.
    Fig 6: Cam Cover

    Courtesy of GENERAL MOTORS CORP.
11. Remove the three right-hand engine mount to front cover nuts and the two engine mount to midrail bracket nuts, allowing the powertrain to rest on the block of wood.
    Fig 7: Engine Mount Bolts And Midrail Bracket Nuts

    Courtesy of GENERAL MOTORS CORP.
    NOTE: Failure to hold the crankshaft timing sprocket in place will cause timing chain guide damage. The tool also aligns the gerotor during front cover installation. After the front cover assembly is loosened and moved approximately 25.4 mm (1 in.) from the engine, the crankshaft timing gear service tool should be removed.
    NOTE: Install the Front Cover Seal Replacer SA9104E with the flat side towards the crankshaft sprocket.
12. Removal of front cover assembly:

    Install the Front Crank Seal Replacer SA9104E to make sure the front crankshaft timing sprocket is held firmly in place.

    Fig 8: Front Cover Assembly

    Courtesy of GENERAL MOTORS CORP.
    NOTE: Spray the two dowel pin holes in the front cover with penetrating oil to facilitate cover removal off the dowel pin.
    NOTE: On (DOHC [LLO]) engines, one front cover assembly attachment bolt is located under the torque axis mount flange, above the accessory drive belt idler pulley.
    NOTE: After the front cover assembly is loosened and moved approximately 25.4 mm (1 in.) from the engine, the Front Crank Seal Replacer SA9104E should be removed.
13. Remove the four front oil pan bolts and 14 front cover bolts:
    1. Use Gasket Seal Cutter SA9123E to cut the oil pan seal away from the front cover.
    2. Remove the front cover bolts.
    Fig 9: Front Oil Pan Bolts

    Courtesy of GENERAL MOTORS CORP.
14. Using the front cover pry tangs, remove the front cover from the cylinder block:
    1. Remove the two oil gallery transfer seals and discard.
    NOTE: The front cover assembly can be removed from under the hood, through the wheel well.
    NOTE: To facilitate front cover installation, install the front cover without RTV applied and position into place. Then remove the cover for RTV application and final installation. This will help prevent RTV disturbance on final installation.

    Fig 10: Removing Front Cover

    Courtesy of GENERAL MOTORS CORP.
15. Place shop towels over the front of engine and oil pan opening to prevent debris entry.