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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 418 (Engine Mechanical - 4.2L 6-Cylinder (On-Vehicle)) >> Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: The oil pan must be installed within 10 minutes from when sealer was applied.
  1. Apply a 3 mm (0.12 in) bead of sealer GM PN 12378521 to the block, rather than the oil pan.
    IMPORTANT: When you install the oil pan, it could be shifted front or back a little which could cause a transmission alignment problem. The back of the oil pan needs to be flush with the block.
  2. Install the oil pan, maneuvering the oil pan to clear the oil pump and screen assembly.
  3. Install the oil pan bolts.
    4. Fig 1: Installing Oil Pan Bolts
    G01706343Courtesy of GENERAL MOTORS CORP.
  4. Inspect the oil pan alignment. Use a straight edge on the back of the back and the oil pan transmission mounting surface.
    5. Fig 2: Inspecting Oil Pan Alignment
    G01706344Courtesy of GENERAL MOTORS CORP.
  5. Install the oil pan bolts.
    NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten 

    • Tighten the oil pan side bolts to 25 N.m (18 lb ft).
    • Tighten the oil pan end bolts to 10 N.m (89 lb in).
  6. Install the 4 transmission bell housing bolts that attach to the oil pan.

    Tighten 

    Tighten bolts to 47 N.m (35 lb ft).

  7. Install the A/C compressor 2 bottom bolts (4).

    Tighten 

    Tighten all 4 bolts to 50 N.m (37 lb ft).

    8. Fig 3: Installing A/C Compressor
    G01706345Courtesy of GENERAL MOTORS CORP.
  8. Install the front differential bolts.

    Tighten 

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

  9. Install the front drive axle, clutch fork assembly. Refer to INTERMEDIATE SHAFT BEARING ASSEMBLY REPLACEMENT - FRONT DRIVE AXLE (S4WD) or INTERMEDIATE SHAFT BEARING ASSEMBLY REPLACEMENT - FRONT DRIVE AXLE (A4WD) in Front Drive Axle.
  10. Clip transmission cooler lines to block.
    11. Fig 4: Clipping Transmission Cooler Lines Block
    G01706346Courtesy of GENERAL MOTORS CORP.
  11. Connect prop shaft to front differential.
  12. Install the steering gear crossmember. Refer to Steering Gear Crossmember Replacement - Front in Frame and Underbody.
    13. Fig 5: Installing Steering Gear Crossmember
    G01706347Courtesy of GENERAL MOTORS CORP.
  13. Install the left and right wheel drive shaft. Refer to FRONT DRIVE AXLE - 4WD article.
  14. Install the oil pan drain plug.

    Tighten 

    Torque the oil pan drain plug to 26 N.m (19 lb ft).

  15. Install the engine protection shield and secure with the bolts.

    Tighten 

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

    16. Fig 6: Installing Engine Protection Shield
    G01706348Courtesy of GENERAL MOTORS CORP.
  16. Install the left and the right front tires. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  17. Lower the vehicle.
    IMPORTANT: Inspect the engine for oil leaks in order to ensure all sealing surfaces are sealed.
  18. Service the engine with oil.
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