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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 144 (Engine Mechanical - 4.3L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Oil Pan Installation

Oil Pan Installation

WARNING: This page is about a different car, the 2003 GMC Savana and 2003 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Apply a 5 mm (0.197 in) wide and 25 mm (1.0 in) long bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) or equivalent, to both the right and left sides of the engine front cover to engine block junction at the oil pan sealing surfaces.
    Fig 1: Applying Adhesive To Right & Left Sides Of Engine Front Cover To Engine Block Junction
    G02078248Courtesy of GENERAL MOTORS CORP.
  2. Apply a 5 mm (0.197 in) wide and 25 mm (1.0 in) long bead of adhesive GM P/N 12346141 (Canadian P/N 10953433) 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.
    Fig 2: Applying Adhesive To Right & Left Sides Of Crankshaft Rear Oil Seal Housing To Engine Block Junction
    G02078249Courtesy of GENERAL MOTORS CORP.

    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.
    Fig 3: Installing Oil Pan Gasket
    G02078250Courtesy of GENERAL MOTORS CORP.

    Important:  The oil pan alignment must always be flush or forward no more than 0.3 mm (0.011 in) from the rear face of the engine block.

  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.
    Fig 4: Installing Oil Pan
    G02078251Courtesy of GENERAL MOTORS CORP.
  6. Install the oil pan bolts and nuts, but do not tighten.
  7. Measure the pan-to-transmission housing clearance using a feeler gage and a straight edge.

    Use a feeler gage 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.

    Fig 5: Measuring Pan-To-Transmission Housing Clearance
    G02078252Courtesy of GENERAL MOTORS CORP.
    CAUTION: The alignment of the mating components is crucial. An offset greater than 0.30 mm (0.011 in) between the rear faces of the oil pan and block is not acceptable. Offsets greater than 0.30 mm (0.011 in) will affect the alignment between the engine assembly and the transmission. Mis-alignment of the engine assembly to the transmission can lead to internal and external damage to the engine assembly and/or transmission.
    CAUTION: 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 (1-12).

    Tighten 

    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.
    Fig 6: Tightening Oil Pan Bolts & Nuts In Sequence
    G02078253Courtesy of GENERAL MOTORS CORP.
  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 

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

    Fig 7: Installing Oil Pan Drain Plug
    G02078254Courtesy of GENERAL MOTORS CORP.
  12. Install the NEW engine oil level sensor, if applicable.

    Tighten 

    Tighten the engine oil level sensor to 13 N.m (115 lb in).

    Fig 8: Installing Engine Oil Level Sensor
    G02078255Courtesy of GENERAL MOTORS CORP.
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