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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 906 (Engine Mechanical - 4.3L (LU3)) >> Repair Instructions >> On-Vehicle Repair Instructions >> Oil Pan Replacement (4WD) >> Installation Procedure

Installation Procedure

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Fig 1: Identifying Adhesive Application Locations
GM317310
NOTE: Any time the transmission and the engine oil pan are off of the engine at the same time, install the transmission before the oil pan. This is to allow for the proper oil pan alignment. Failure to achieve the correct oil pan alignment can result in transmission failure
  1. Apply a 5 mm (0.197 in) wide and 25 mm (1.0 in) long bead of adhesive GM P/N 12346141 or equivalent to both the right and left sides of the engine front cover to engine block junction at the oil pan sealing surfaces.
    2. Fig 2: Adhesive At Right & Left Sides Of Crankshaft Rear Oil Seal Housing
    GM317313
  2. Apply a 5 mm (0.197 in) wide and 25 mm (1.0 in) long bead of adhesive GM P/N 12346141 or equivalent to both the right and left sides of the crankshaft rear oil seal housing to engine block junction at the oil pan sealing surfaces
    3. Fig 3: View Of Oil Pan Gasket
    GM387757
    IMPORTANT: Always install a NEW oil pan gasket. The oil pan gasket and oil pan must be installed and the fasteners tightened while the adhesive is still wet to the touch.
  3. Install the NEW oil pan gasket into the groove in the oil pan.
    4. Fig 4: View Of Oil Pan
    GM330568
  4. Install the oil pan onto the engine block. Press the oil pan gasket into the grooves of the engine front cover and crankshaft rear oil seal housing.
  5. Slide the oil pan back against a suitable straight edge.
    6. Fig 5: Measuring Pan-To-Transmission Housing Clearance
    GM38496
  6. Install the oil pan bolts and nuts, but do not tighten.
  7. Measure the pan-to-transmission housing clearance using a feeler gauge and a straight edge. Use a feeler gauge to check the clearance between the oil pan-to-transmission housing measurement points. If the clearance exceeds 0.3 mm (0.011 in) at any of the 3 oil pan-to-transmission housing measurement points (1), then repeat the step until the oil pan-to-transmission housing clearance is within the specification. The oil pan must always be forward of the rear face of the engine block.
    8. Fig 6: Identifying Oil Pan Bolts & Nuts Tightening Sequence
    GM38481
    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
  8. Tighten the oil pan bolts and nuts in sequence. Tighten the oil pan bolts to 25 N.m (18 lb ft).
  9. Measure the clearance between the 3 oil pan-to-transmission housing measurement points in order to ensure proper alignment.
    10. Fig 7: Identifying Oil Drain Plug
    GM188048
  10. Install a NEW oil pan drain plug seal (O-ring) onto the oil pan drain plug.
  11. Install the oil pan drain plug into the oil pan. Tighten the oil pan drain plug to 25 N.m (18 lb ft).
    12. Fig 8: Engine Oil Level Sensor
    GM387460
    IMPORTANT: The low oil level sensor is not reusable. Use a NEW low oil sensor.
  12. Install the NEW engine oil level sensor (if applicable). Tighten the engine oil level sensor to 13 N.m (115 lb in).
    13. Fig 9: Transmission To Oil Pan Bolts
    GM477866
    NOTE: Any time the transmission and the engine oil pan are off of the engine at the same time, install the transmission before the oil pan. This is to allow for the proper oil pan alignment. Failure to achieve the correct oil pan alignment can result in transmission failure.
  13. Install the transmission to oil pan bolts. Tighten the transmission to the oil pan bolts to 47 N.m (35 lb ft).
    14. Fig 10: Locating Access Plugs For Oil Pan Rear Nuts
    GM331034
  14. Install the access plugs for the oil pan rear nuts.
    15. Fig 11: Locating Access Plugs For Oil Pan Rear Nuts
    GM331034
  15. Install the stud holding the bracket for the starter wire harness and if equipped, the transmission oil cooler pipes. Tighten the bracket stud to 9 N.m (80 lb in).
  16. Install the remote oil filter pipe adapter. Refer to Oil Filter Adapter Replacement .
    17. Fig 12: View Of Remote Oil Filter Inlet & Outlet Hose Clip Bolt
    GM344049
  17. Install the bolt holding the oil filter inlet and outlet hose clip to the oil pan. Tighten the hose clip bolt to 10 N.m (88 lb in).
    18. Fig 13: View Of Transmission Cover
    GM334324
  18. Install the transmission cover and bolts. Tighten the transmission cover bolts to 12 N.m (106 lb in).
  19. Install the starter motor. Refer to STARTER MOTOR .
  20. Install the front differential assembly. Refer to DIFFERENTIAL CARRIER ASSEMBLY REPLACEMENT in Front Drive Axle.
  21. Install the oil level indicator.
  22. Fill the engine with engine oil.
  23. Connect the negative battery cable.
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