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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1188 (Engine Mechanical - 5.7L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

Important:  All gasket surfaces should be free of oil or other foreign material during assembly.

The alignment of the structural oil pan is critical. The rear bolt hole locations of the oil pan provide mounting points for the flywheel housing cover. 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 are flush or even. The rear of the oil pan must NEVER protrude beyond the engine block.

Do NOT reuse 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 U.S. 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 protrude into the oil pan surface.
    Fig 1: Applying Sealant To Engine Block
    G01970582Courtesy of GENERAL MOTORS CORP.
  2. Apply a 5 mm (0.20 in) bead of sealant GM U.S. 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 protrude into the oil pan surface.
    Fig 2: Applying Sealant To Tabs Of Rear Cover Gasket
    G01970583Courtesy of GENERAL MOTORS CORP.

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

  3. Pre-assemble the oil pan gasket to the pan.
    1. 3.1. Install the gasket onto the oil pan.
    2. 3.2. Install the oil pan bolts to the pan and through the gasket.
    3. 3.3. Install the oil pan, gasket and bolts to the engine block.
    4. 3.4. Tighten the oil pan bolts until snug. Do not overtighten.
    Fig 3: Pre-Assembling Oil Pan Gasket To Pan
    G01970584Courtesy of GENERAL MOTORS CORP.
  4. Install the 2 bottom flywheel housing bolts to position the oil pan correctly.
    NOTE: Refer to FASTENER NOTICE .
  5. Tighten the 2 bottom flywheel housing bolts until snug. Do not overtighten.

    Tighten 

    1. 5.1. Tighten the oil pan bolt and oil pan-to-front cover bolts to 25 N.m (18 lb ft).
    2. 5.2. Tighten the oil pan-to-rear cover bolts to 12 N.m (106 lb in).
    3. 5.3. Tighten the flywheel housing bolts to 50 N.m (37 lb ft).
    Fig 4: Installing Bottom Flywheel Housing Bolts
    G01970585Courtesy of GENERAL MOTORS CORP.
  6. Connect the engine oil temperature sensor (3) electrical connector.
    Fig 5: Connecting Engine Oil Temperature Sensor Electrical Connector
    G01970586Courtesy of GENERAL MOTORS CORP.
  7. Connect the engine oil level sensor electrical connector (2).
    Fig 6: Connecting Engine Oil Level Sensor Electrical Connector
    G01970587Courtesy of GENERAL MOTORS CORP.
  8. Install the right transmission cover and bolt.
    Fig 7: Installing Right Transmission Cover
    G01970588Courtesy of GENERAL MOTORS CORP.

    Tighten 

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

  9. Install the automatic transmission fluid cooler line clamp bolt-at-the oil pan, if equipped.

    Tighten 

    Tighten the automatic transmission fluid cooler line clamp bolt-at-the oil pan to 12 N.m (106 lb in).

    Fig 8: Installing Automatic Transmission Fluid Cooler Line Clamp Bolt-At-The Oil Pan
    G01970589Courtesy of GENERAL MOTORS CORP.
  10. Install the automatic transmission fluid cooler line clamp bolt-at-right transmission cover, if equipped.

    Tighten 

    Tighten the automatic transmission fluid cooler line bolt-at-right transmission cover to 2.5 N.m (22 lb in).

    Fig 9: Installing Automatic Transmission Fluid Cooler Line Clamp Bolt-At-Right Transmission Cover
    G01970590Courtesy of GENERAL MOTORS CORP.
  11. Install the left transmission cover and bolt.
    Fig 10: Installing Left Transmission Cover
    G01970591Courtesy of GENERAL MOTORS CORP.

    Tighten 

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

  12. Install the starter motor. Refer to STARTER MOTOR in Engine Electrical.
  13. Install the oil pan (lower) (3) and gasket (2) to the oil pan (1).
  14. Install the oil pan bolts (4).
    Fig 11: Installing Oil Pan (Lower) And Gasket To Oil Pan
    G01970592Courtesy of GENERAL MOTORS CORP.
  15. Tighten the oil pan (lower) bolts (1-15) in a crossing pattern, alternating from side-to-side.
    Fig 12: Locating Oil Pan (Lower) Bolts
    G01970593Courtesy of GENERAL MOTORS CORP.

    Tighten 

    Tighten the oil pan (lower) bolts to 12 N.m (106 lb in).

  16. Install a NEW engine oil filter.

    Tighten 

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

    Fig 13: Installing Engine Oil Filter
    G01970594Courtesy of GENERAL MOTORS CORP.
  17. Install the oil pan drain plug.
    Fig 14: Installing Oil Pan Drain Plug
    G01970595Courtesy of GENERAL MOTORS CORP.

    Tighten 

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

  18. Install the front suspension crossmember to the vehicle. Refer to FRONT SUSPENSION CROSSMEMBER REPLACEMENT in Front Suspension.
  19. Fill the crankcase with the proper quantity and grade of engine oil. Refer to Maintenance.
  20. Check the transmission fluid, add if necessary.
  21. Run the engine and check for leaks.
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