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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1497 (Engine Mechanical - 4.2L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

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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.
    Fig 1: Installing Oil Pan
    G02128588Courtesy of GENERAL MOTORS CORP.
  4. Inspect the oil pan alignment. Use a straight edge on the back of the block and the oil pan transmission mounting surface.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  5. Install the oil pan bolts.

    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).

    Fig 2: Inspecting Oil Pan Alignment
    G02128589Courtesy of GENERAL MOTORS CORP.
  7. Install the A/C compressor 2 bottom bolts (4).

    Tighten 

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

  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.
    Fig 3: Installing A/C Compressor Bottom Bolts
    G02128590Courtesy of GENERAL MOTORS CORP.
  10. Clip transmission cooler lines to block.
  11. Connect prop shaft to front differential.
    Fig 4: Clipping Transmission Cooler Lines To Block
    G02128591Courtesy of GENERAL MOTORS CORP.
  12. Install the steering gear crossmember.
  13. Install the left and right wheel drive shaft. Refer to AXLE SHAFTS .
    Fig 5: Installing Steering Gear Crossmember
    G02128592Courtesy of GENERAL MOTORS CORP.
  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. 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.
    Fig 6: Installing Engine Protection Shield
    G02128593Courtesy of GENERAL MOTORS CORP.
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