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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1619 (Engine Mechanical - 4.8L, 5.3L & 6.0L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Engine Block Cleaning and Inspection >> Tools Required

Tools Required

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  1. Clean the following areas:
    NOTE: Do not use a caustic solution to clean the aluminum engine block.
    IMPORTANT: When cleaning the engine block in a thermal type oven, do not exceed 450°F (232°C).
    • The engine block in the solvent, to remove all sludge, dirt, or debris

      Refer to Cleanliness and Care .

      CAUTION: Refer to SAFETY GLASSES CAUTION .
    • Dry the block with compressed air.
    • The gasket surfaces

      Refer to Replacing Engine Gaskets .

    • The coolant passages
    • The oil galleries
    • The main bearing caps
    • The engine block cylinder head bolt holes for threadlocking material
      Fig 1: J 8087 (Cylinder Bore Gage)
      G02106985Courtesy of GENERAL MOTORS CORP.

      Thread repair driver tool J 42385-107 may be used to clean the threads of old threadlocking material.

  2. Inspect the following areas:
    • The cylinder walls for excessive scratches, gouging, or ring ridge
    • The cylinder bores for excessive ring ridge at the top of the cylinder
    • The coolant jacket for cracks
    • The valve lifter bores for excessive scoring or wear
    • The crankshaft bearing webs for cracks
    • The gasket sealing surfaces for excessive scratches or gouging

      Refer to Replacing Engine Gaskets .

    • The oil galleries for restrictions
    • All threaded bolt holes for damage
  3. Measure the following areas:
    • The cylinder bores for taper
    • The cylinder bores for excessive ring ridge at the top of the cylinder
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