H3 2006

Oil Pan

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Removal & Installation



3.5L & 3.7L Engines

Specific to:

Hummer H3 2006-2010

  1. Remove the oil level indicator and tube.
  2.  
  3. Remove the oil pan skid plate.
  4.  
  5. Drain the engine oil.
  6.  
  7. Remove the crossmember.
  8.  
  9. Remove the differential carrier assembly bushing to frame bolts ONLY.

    Click image to see an enlarged view

    Fig. Remove the differential carrier assembly bushing to frame bolts

  10.  
  11. Pull the differential carrier assembly downward.
  12.  
  13. Secure the pinion yoke, in order to prevent the differential carrier from rotating.
  14.  
  15. Remove the service slot plug.

    Click image to see an enlarged view

    Fig. Remove the service slot plug (1)

  16.  
  17. Remove the nuts securing the fuel hose/pipe bracket to the transmission, and position aside.
  18.  
  19. Remove 4 lower transmission mounting bolts that are attached to the oil pan.

    Click image to see an enlarged view

    Fig. Remove 4 lower transmission mounting bolts that are attached to the oil pan

  20.  
  21. Remove the power steering gear.
  22.  
  23. Pull the power steering gear downward in order to gain access to the oil pan.
  24.  
  25. Disconnect the engine wiring harness retainers from the oil pan.
  26.  
  27. Remove the oil pan bolts.

    Click image to see an enlarged view

    Fig. Remove the oil pan bolts

  28.  
  29. Install 2 bolts in the threaded holes at the rear of the oil pan to act as jack screws and tighten evenly to release the oil pan from the engine block.
  30.  
  31. Remove the oil pan.
  32.  
  33. Remove the 2 bolts from the jack screw holes.
  34.  
  35. Clean and inspect the oil pan.
  36.  
  37. Clean and inspect the engine block sealing surface.
  38.  

To install:


NOTE
The oil pan must be installed within 10 minutes from when the sealer was applied.

  1. Apply a bead of sealer to the oil pan in the areas marked.

    Click image to see an enlarged view

    Fig. Apply a bead of sealer to the oil pan in the areas marked (1, 2)

  2.  
  3. Apply a bead of sealer to the oil pan in the area marked.
    CAUTION
    Use care not to allow the sealer to contact the oil pump pipe and screen assembly.

  4.  
  5. Position the oil pan to the engine block.
  6.  
  7. Ensure the oil pan is positioned fully rearward against the transmission mounting surface.
  8.  
  9. Install the oil pan bolts.
  10.  
  11. Tighten the oil pan bolts.
    1. Tighten the (side) bolts to 18 ft. lbs. (25 Nm).
    2.  
    3. Tighten the (end) bolts to 89 inch lbs. (10 Nm).
    4.  

  12.  
  13. Connect the engine wiring harness retainers to the oil pan.
  14.  
  15. Position the power steering gear upward to the frame assembly.
  16.  
  17. Install the power steering gear.
  18.  
  19. Install the 4 lower transmission mounting bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  20.  
  21. Install the nuts securing the fuel hose/pipe bracket to the transmission. Tighten the nuts to 15 ft. lbs. (20 Nm).
  22.  
  23. Install the service slot plug.
  24.  
  25. Position the differential carrier assembly to the frame.
  26.  
  27. Install the differential carrier assembly bushing to frame bolts. Tighten the bolts to 112 ft. lbs. (152 Nm).
  28.  
  29. Install the crossmember.
  30.  
  31. Install the oil pan skid plate.
  32.  
  33. Install the oil level indicator and tube.
  34.  
  35. Fill the engine oil.
  36.  

5.3L Engine

Specific to:

Hummer H3 2006-2010

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the oil level indicator tube.
  4.  
  5. Remove the front differential, if equipped.
  6.  
  7. Drain the engine oil.
  8.  
  9. Remove the transmission oil cooler lines from the retainer.
  10.  
  11. Remove the transmission oil cooler line retaining bracket bolt and bracket.
  12.  
  13. Remove the inner axle shaft.
  14.  
  15. Remove the starter.
  16.  
  17. Remove the flywheel inspection cover from the left side of the transmission.
  18.  
  19. Remove the battery cable channel bolt from the front of the oil pan.
  20.  
  21. Remove the battery cable channel from the oil pan.
  22.  
  23. Loosen the 2 upper Air Conditioning (A/C) compressor bracket bolts.
  24.  
  25. Remove the 2 lower A/C compressor bracket bolts.
  26.  
  27. Position the A/C compressor aside and secure.
  28.  
  29. Remove the 2 lower bellhousing bolts (1).

    Click image to see an enlarged view

    Fig. Remove the 2 lower bellhousing bolts (1)

  30.  
  31. Remove the oil pan bolts.
  32.  
  33. Remove the oil pan by tilting the rear of the oil pan down to clear the transmission, pull the oil pan rearward past the front wire harness, then lower the oil pan clear of the vehicle.
    NOTE
    The oil pan gasket is reusable. It is NOT necessary to remove the oil pan gasket unless damaged.


    NOTE
    DO NOT allow foreign material to enter the oil passages of the oil pan, cap or cover the openings as required.



    Click image to see an enlarged view

    Fig. Oil pan and bolts (1)

  34.  
  35. Drill out the oil pan gasket retaining rivets, if required.
  36.  
  37. Remove the gasket from the pan.
  38.  
  39. Discard the gasket and rivets.
  40.  
  41. Clean and inspect the oil pan.
  42.  

To install:


WARNING
The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the transmission bellhousing. To ensure the rigidity of the powertrain and correct transmission alignment, it is important that the rear of the block and the rear of the oil pan must NEVER protrude beyond the engine block and transmission bellhousing plane.


NOTE
If replacing the oil pan gasket it is not necessary to rivet the NEW gasket to the oil pan.

  1. Apply a 0.2 inches (5 mm) bead of sealant 0.8 inches (20 mm) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface.

    Click image to see an enlarged view

    Fig. Sealant application-front cover gasket tabs

  2.  
  3. Apply a 0.2 inches (5 mm) bead of sealant 0.8 inches (20 mm) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface.

    Click image to see an enlarged view

    Fig. Sealant application-rear cover gasket tabs

  4.  
  5. Pre-assemble the oil pan gasket and bolts to the pan:
    1. Install the gasket onto the pan.
    2.  
    3. Install the oil pan bolts to the pan and through the gasket.
    4.  

  6.  
  7. Install the oil pan, oil pan gasket, and bolts to the engine block as an assembly.
  8.  
  9. Hand thread the oil pan bolts into the engine block until snug. Do not tighten at this time.
  10.  
  11. Install the 2 lower bellhousing bolts:
    1. Tighten the lower bellhousing bolts to 37 ft. lbs. (50 Nm).
    2.  
    3. Tighten the 2 rear oil pan to rear cover bolts to 106 inch lbs. (12 Nm).
    4.  
    5. Tighten the remaining oil pan bolts to 18 ft. lbs. (25 Nm).
    6.  

  12.  
  13. Install the 2 lower A/C compressor bracket bolts and tighten to 37 ft. lbs. (50 Nm).
  14.  
  15. Tighten the 2 upper A/C compressor bracket bolts to 37 ft. lbs. (50 Nm).
  16.  
  17. Install the battery cable channel to the oil pan.
  18.  
  19. Install the battery cable channel bolt to the oil pan and tighten the bolt to 106 inch lbs. (12 Nm).
  20.  
  21. Install the flywheel inspection cover to the left side of the transmission.
  22.  
  23. Install the starter.
  24.  
  25. Install the inner axle shaft.
  26.  
  27. Install the transmission oil cooler line retaining bracket and bolt and tighten to 80 inch lbs. (9 Nm).
  28.  
  29. Install the transmission oil cooler lines to the retainer.
  30.  
  31. Install the oil level indicator tube.
  32.  
  33. Fill the engine with oil.
  34.  
  35. Install the front differential, if equipped.
  36.  

 
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