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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 722 (Engine Mechanical - 8.1L (Unit Repair)) >> Repair Instructions >> Piston, Connecting Rod, and Bearing Removal

Piston, Connecting Rod, and Bearing Removal

WARNING: This page is about a different car, the 2002 GMC Yukon XL, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required 

Important:  Do not remove the excessive material from the cylinder bore. Excessive removal of material may require cylinder boring to the next oversize.

  1. Remove the cylinder bore ridge as necessary.
    1. 1.1. Install the J 42846  onto the front of the crankshaft in order to turn the crankshaft.
    2. 1.2. Rotate the crankshaft until the piston is at the bottom of the stroke (BDC).
    3. 1.3. Place a cloth on top of the piston.
    4. 1.4. Perform the cutting operation with a J 24270  . Refer to the manufacturer's instructions before using the J 24270  .
    5. 1.5. Remove the J 24270  .
    6. 1.6. Rotate the crankshaft until the piston is at top dead center (TDC).
    7. 1.7. Remove the cloth and the cuttings.
    8. 1.8. Repeat the procedure for each piston.
    Fig 1: Removing Cylinder Bore Ridge Using J 42846
    G01675371Courtesy of GENERAL MOTORS CORP.

    Important:  Place the matching marks or numbers on the connecting rods and the connecting rod caps. The connecting rod caps must be assembled to their original connecting rods.

    Important:  When connecting rod bearings are removed, NEW bearings must be installed.

  2. Remove the connecting rod nuts.
  3. Remove the connecting rod cap and the lower connecting rod bearing.
    Fig 2: Connecting Rod Cap & Nuts
    G01675372Courtesy of GENERAL MOTORS CORP.
  4. Install rubber fuel line onto the connecting rod bolts to prevent contact with the crankshaft.
    Fig 3: Installing Rubber Fuel Lines Onto Connecting Rod Bolts
    G01675373Courtesy of GENERAL MOTORS CORP.
  5. Remove the piston, connecting rod and upper connecting rod bearing out of the top of the engine block.
    Fig 4: Piston, Connecting Rod & Upper Connecting Rod Bearing
    G01675374Courtesy of GENERAL MOTORS CORP.
  6. Remove the rubber fuel line from the connecting rod bolts.
  7. Remove the remaining piston and the connecting rod assemblies.
  8. Remove the J 42846  from the front of the crankshaft.
    Fig 5: Rubber Fuel Lines & Connecting Rod Bolts
    G01675375Courtesy of GENERAL MOTORS CORP.