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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1496 (Engine Mechanical - 5.3L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Envoy XL and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
  • 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.
  • If replacing the oil pan gasket it is not necessary to rivet the NEW gasket to the oil pan.
  1. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 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.
    Fig 1: Applying Sealant Directly Onto Tabs Of Front Cover Gasket
    G02129227Courtesy of GENERAL MOTORS CORP.
  2. Apply a 5 mm (0.20 in) bead of sealant GM P/N 12378190, or equivalent 20 mm (0.80 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.
    Fig 2: Applying Sealant Directly Onto Tabs Of Rear Cover Gasket
    G02129228Courtesy of GENERAL MOTORS CORP.
  3. Pre-assemble the oil pan gasket and bolts to the pan.
    • Install the gasket onto the pan.
    • Install the oil pan bolts to the pan and through the gasket.
  4. Install the oil pan, oil pan gasket, and bolts to the engine block as an assembly.
  5. Hand thread the oil pan bolts into the engine block until snug. Do not tighten at this time.
    Fig 3: Installing Oil Pan, Oil Pan Gasket, And Bolts To Engine Block
    G02129229Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  6. Install the 2 lower bellhousing bolts.

    Tighten 

    1. 6.1. Tighten the lower bellhousing bolts to 50 N.m (37 lb ft).
    2. 6.2. Tighten the 2 rear oil pan to rear cover bolts to 12 N.m (106 lb in).
    3. 6.3. Tighten the remaining oil pan bolts to 25 N.m (18 lb ft).
      Fig 4: Installing Bellhousing Bolts
      G02129230Courtesy of GENERAL MOTORS CORP.
  7. Release the differential from the frame and install to the oil pan.
  8. Install the differential bolts.

    Tighten 

    Tighten the bolts to 85 N.m (63 lb ft).

    Fig 5: Installing Differential Bolts
    G02129231Courtesy of GENERAL MOTORS CORP.
  9. Install the 2 lower A/C compressor bracket bolts.
  10. Tighten the 2 upper A/C compressor bracket bolts.

    Tighten 

    Tighten the bolts to 50 N.m (37 lb ft).

  11. Install the battery cable channel to the oil pan.
  12. Install the battery cable channel bolt to the oil pan.

    Tighten 

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

  13. Install the Flywheel inspection cover to the left side of the transmission.
    Fig 6: Installing Lower A/C Compressor Bracket Bolts
    G02129232Courtesy of GENERAL MOTORS CORP.
  14. Install the starter. Refer to STARTING SYSTEM  in Engine Electrical.
  15. Install the inner axle shaft. Refer to INNER AXLE SHAFT REPLACEMENT - FRONT DRIVE AXLE  in Front Drive Axle.
  16. Install the transmission oil cooler line retaining bracket and bolt.

    Tighten 

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

    Fig 7: Installing Transmission Oil Cooler Line Retaining Bracket And Bolt
    G02129233Courtesy of GENERAL MOTORS CORP.
  17. Install the transmission oil cooler lines to the retainer.
    Fig 8: Installing Transmission Oil Cooler Lines To Retainer
    G02129234Courtesy of GENERAL MOTORS CORP.
  18. Unsecure the right wheel driveshaft from the frame.
  19. Install the left and right wheel driveshafts. Refer to AXLE SHAFTS .
  20. Unsecure the front shock modules from the frame.
    Fig 9: Identifying Front Shock Modules
    G02129235Courtesy of GENERAL MOTORS CORP.
  21. Place an adjustable jack stand under the lower control arm.
  22. Using the adjustable jack stand raise the lower control arm and knuckle assembly in order to connect the upper ball joint to the upper control arm.
  23. Install the upper ball joint pinch nut and bolt.

    Tighten 

    Tighten the nut to 40 N.m (30 lb ft).

  24. Remove the jack stand from under the lower control arm.
    Fig 10: Installing Upper Ball Joint Pinch Nut And Bolt
    G02129236Courtesy of GENERAL MOTORS CORP.
  25. Connect the sway bar link pins to the lower control arm on both sides.
  26. Install the steering gear. Refer to POWER STEERING GEAR REPLACEMENT  in Power Steering System.
  27. Unsecure the propeller shaft from the frame.
  28. Align the reference marks on the propeller shaft to the marks on the front axle pinion yoke.
  29. Connect the propeller shaft to the front axle pinion yoke.
  30. Install the yoke retainers and yoke retainer bolts to the front axle pinion yoke.

    Tighten 

    Tighten the bolts to 20 N.m (15 lb ft).

    Fig 11: Connecting Propeller Shaft To Front Axle Pinion Yoke
    G02129237Courtesy of GENERAL MOTORS CORP.
  31. Install the brake hose retaining bolts to the frame.

    Tighten 

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

    Fig 12: Installing Brake Hose Retaining Bolts To Frame
    G02129238Courtesy of GENERAL MOTORS CORP.
  32. Connect the wheel speed sensor electrical connectors.
    Fig 13: Connecting Wheel Speed Sensor Electrical Connectors
    G02129239Courtesy of GENERAL MOTORS CORP.
  33. Install the left and right ABS wiring harnesses to the retainers.
    Fig 14: Installing Left And Right ABS Wiring Harnesses To Retainers
    G02129240Courtesy of GENERAL MOTORS CORP.
  34. Fill the differential with oil.
  35. Install the engine shield and bolts.

    Tighten 

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

  36. Install the tires and wheels. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
    Fig 15: Installing Engine Shield And Bolts
    G02129241Courtesy of GENERAL MOTORS CORP.
  37. Fill the engine with oil.
  38. Fill the Power Steering System with fluid.
  39. Install the front shock upper retaining nuts.

    Tighten 

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

  40. Install the oil level indicator tube. Refer to OIL LEVEL INDICATOR AND TUBE REPLACEMENT   .
  41. Connect the negative battery cable. Refer to BATTERY NEGATIVE CABLE DISCONNECT/CONNECT PROCEDURE  in Engine Electrical.
    Fig 16: Installing Front Shock Upper Retaining Nuts
    G02129242Courtesy of GENERAL MOTORS CORP.
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