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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1444 (Engine Mechanical - 5.3L (Lm4)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston, Connecting Rod, and Bearing Installation >> Piston, Pin, and Connecting Rod Installation

Piston, Pin, and Connecting Rod Installation

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Piston & Connecting Rod Components
    GM1366359Courtesy of GENERAL MOTORS CORP.
  1. Lightly lubricate the following components with clean engine oil:
    • Piston (1)
    • Piston rings
    • Cylinder bore
    • Bearings (3) and bearing surfaces
  2. Position the oil control ring end gaps a minimum of 25 mm (1.0 in) from each other.
  3. Position the compression ring end gaps 180 degrees opposite each other.
    4. Fig 2: View Of J 41556 & Connecting Rod
    GM1366358Courtesy of GENERAL MOTORS CORP.
  4. Install the J 41556  to the connecting rod.
    5. Fig 3: Installing Piston Using J 8037
    GM63217Courtesy of GENERAL MOTORS CORP.
  5. Install the J 8037  onto the piston and compress the piston rings.
    6. IMPORTANT: The piston alignment mark MUST face the front of the engine block.
  6. Install the piston, pin, and connecting rod assembly into the cylinder bore. Hold the piston ring compressor firmly against the engine block. Using a wooden hammer handle, lightly tap the top of the piston until all the piston rings have entered the cylinder bore.
    7. Fig 4: View Of J 41556 & Connecting Rod
    GM63186Courtesy of GENERAL MOTORS CORP.
  7. Use the J 41556  to guide the connecting rod onto the crankshaft journal.
  8. Remove the J 41556  from the connecting rod.
    9. Fig 5: View Of Piston, Connecting Rod, Bearing Cap, Bearing Halves & Bolts
    GM53223Courtesy of GENERAL MOTORS CORP.
    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.
    IMPORTANT: The connecting rod and cap must be assembled with the mating surfaces properly aligned.
  9. Install the bearing cap, bearing half, and bolts.

    Tighten: 

    1. Tighten the bolts a first pass to 20 N.m (15 lb ft).
    2. Tighten the bolts a final pass to 75 degrees using the J 45059  .

    10. Fig 6: Measuring Connecting Rod Side Clearance
    GM1366378Courtesy of GENERAL MOTORS CORP.
  10. Measure the connecting rods for the proper side clearance. Refer to Engine Mechanical Specifications  .
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