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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 344 (Engine Mechanical - 5.3L, 6.0L & 6.2L - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Oil Pan Replacement (2WD) >> Installation Procedure

Installation Procedure

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NOTE:
  • 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.
  • Do not reuse the oil pan gasket.
  • It is not necessary to rivet the NEW gasket to the oil pan.
    Fig 1: Applying Sealant To Front Oil Pan-To-Engine Block Junction
    GM451897Courtesy of GENERAL MOTORS CORP.
  1. If reusing the oil pan perform the following step, otherwise proceed to step 3.
    2. NOTE:

    Be sure to align the oil gallery passages in the oil pan and engine block properly with the oil pan gasket.

  2. Place a NEW oil pan gasket onto the oil pan.
  3. Apply a 5 mm (0.20 in) bead of sealant, 20 mm (0.80 in) long to the engine block. Apply the sealant directly onto the tabs of the front cover gasket that protrudes into the oil pan surface. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    4. Fig 2: Applying Sealant To Rear Oil Pan-To-Engine Block Junction
    GM451898Courtesy of GENERAL MOTORS CORP.
  4. Apply a 5 mm (0.20 in) bead of sealant, 20 mm (0.8 in) long to the engine block. Apply the sealant directly onto the tabs of the rear cover gasket that protrudes into the oil pan surface. Refer to Adhesives, Fluids, Lubricants, and Sealers .
    5. Fig 3: Oil Pan Bolts
    GM683355Courtesy of GENERAL MOTORS CORP.
  5. Install 1 oil pan bolt into a oil pan bolt hole and up through the gasket.
  6. Position and install the oil pan and the rest of the oil pan bolts.
  7. Tighten the oil pan bolts until snug.
    8. Fig 4: Lower Right Transmission Stud
    GM1698079Courtesy of GENERAL MOTORS CORP.
  8. For vehicles with a 6L80-E automatic transmission, position the oil cooler bracket and install the lower right transmission stud until snug.
    9. Fig 5: Lower Left Transmission Bolt
    GM1698070Courtesy of GENERAL MOTORS CORP.
  9. For vehicles with a 6L80-E automatic transmission, install the lower left transmission bolt until snug.
    10. Fig 6: Lower Transmission Bolts
    GM1698412Courtesy of GENERAL MOTORS CORP.
  10. For vehicles with a 4L80-E automatic transmission, install the 2 lower transmission bolts until snug.
    11. Fig 7: Lower Transmission Bolts
    GM1698069Courtesy of GENERAL MOTORS CORP.
    CAUTION:

    Refer to Fastener Caution .

  11. For vehicles with a 4L60-E/4L70-E automatic transmission, install the 2 lower transmission bolts until snug.

    Tighten 

    1. Tighten the oil pan and oil pan-to-oil pan front cover bolts to 25 N.m (18 lb ft).
    2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
    3. Tighten the transmission bolts/stud to 50 N.m (37 lb ft).
    12. Fig 8: Transmission Oil Cooler Line Clip And Bolt
    GM1698074Courtesy of GENERAL MOTORS CORP.
  12. Position the transmission oil cooler line clip and install the bolt to the oil pan.

    Tighten 

    Tighten the bolt to 9 N.m (80 lb in).

    13. Fig 9: Transmission Oil Cooler Line Clip
    GM1698081Courtesy of GENERAL MOTORS CORP.
  13. For vehicles with a 6L80-E automatic transmission, install the oil cooler lines to the clip (1).
    14. Fig 10: Oil Cooler Line Clip
    GM1698076Courtesy of GENERAL MOTORS CORP.
  14. For vehicles with a 4L80-E automatic transmission, install the oil cooler lines to the clip (1), if equipped.
    15. Fig 11: Oil Cooler Line Clip
    GM1698073Courtesy of GENERAL MOTORS CORP.
  15. For vehicles with a 4L60-E/4L70-E automatic transmission, install the oil cooler lines to the clip (1), if equipped.
    16. Fig 12: Electrical Connector, Cable Channel Bolt And Pin
    GM1697734Courtesy of GENERAL MOTORS CORP.
  16. Position the channel and slide the channel pin (3) into the oil pan tab.
  17. Install the battery cable channel bolt (2).

    Tighten 

    Tighten the bolt to 12 N.m (106 lb in).

    18. Fig 13: Engine Wiring Harness Electrical Connector And Components
    GM1698087Courtesy of GENERAL MOTORS CORP.
  18. Connect the engine harness electrical connector (4) to the oil level sensor.
  19. Install the engine harness clip (3) to the transmission oil cooler line bracket.
    20. Fig 14: Vehicle Crossbar, Bolts And Nuts
    GM1698282Courtesy of GENERAL MOTORS CORP.
  20. For both the 1500 and 2500 series, perform the following steps prior to installing the crossbar bolts.
    1. Remove all traces of the original adhesive patch.
    2. Clean the threads of the bolts with denatured alcohol or equivalent and allow to dry.
    3. Apply threadlock GM P/N 12345493 (Canadian P/N 10953488) or equivalent to the bolt threads.
  21. For 2500 series vehicles, install the crossbar and crossbar bolts/nuts.

    Tighten 

    Tighten the nuts to 120 N.m (89 lb ft).

    22. Fig 15: Vehicle Crossbar, Bolts And Nuts
    GM1698280Courtesy of GENERAL MOTORS CORP.
  22. For 1500 series vehicles, install the crossbar and crossbar bolts/nuts.

    Tighten 

    Tighten the nuts to 100 N.m (74 lb ft).

    23. Fig 16: Left Side Transmission Cover Bolt
    GM1698086Courtesy of GENERAL MOTORS CORP.
  23. Position the left side transmission cover and install the cover bolt.

    Tighten 

    Tighten the bolt to 12 N.m (106 lb in).

    24. Fig 17: Right Side Transmission Cover Bolt
    GM1698084Courtesy of GENERAL MOTORS CORP.
  24. Install the right side transmission cover bolt.

    Tighten 

    Tighten the bolt to 12 N.m (106 lb in).

    25. Fig 18: Engine Oil Filter
    GM1658113Courtesy of GENERAL MOTORS CORP.
  25. If reusing the old oil pan remove the old oil filter and install a NEW oil filter.
  26. Lubricate the NEW oil filter seal with clean engine oil.
  27. Install the NEW oil filter (437).

    Tighten 

    Tighten the oil filter to 30 N.m (22 lb ft).

    28. Fig 19: Oil Pan Drain Plug
    GM1658109Courtesy of GENERAL MOTORS CORP.
  28. Ensure that the oil pan drain plug (430) is tight.

    Tighten 

    Tighten the drain plug to 25 N.m (18 lb ft).

  29. Raise the steering rack in place and install the steering rack bolts.

    Tighten 

    • Tighten the left side steering rack bolts to 200 N.m (148 lb ft).
    • Tighten the right side steering rack bolts to 100 N.m (74 lb ft).
    30. Fig 20: Oil Pan Skid Plate And Bolts
    GM1698083Courtesy of GENERAL MOTORS CORP.
  30. For 2500 series vehicles, position the oil pan skid plate and tighten until snug the 2 rear oil pan skid plate bolts, install the 2 front oil pan skid plate bolts, if equipped.

    Tighten 

    Tighten the bolts to 28 N.m (21 lb ft).

    31. Fig 21: Oil Pan Skid Plate And Bolts
    GM1698082Courtesy of GENERAL MOTORS CORP.
  31. For 1500 series vehicles, position the oil pan skid plate and install the oil pan skid plate bolts, if equipped.

    Tighten 

    Tighten the bolts to 28 N.m (21 lb ft).

  32. Lower the vehicle.
  33. Fill the engine with NEW engine oil. Refer to Fluid and Lubricant Recommendations , and Approximate Fluid Capacities .
  34. Start the engine and inspect for leaks.
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