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Cylinder Block

  1. Inspect cylinder block deck surface warpage. Cylinder block must be resurfaced if warpage exceeds specification. Ensure cylinder block deck height is within specification after machining. See CYLINDER BLOCK  table under ENGINE SPECIFICATION.
    CAUTION: DO NOT machine more than .008" (.20 mm) total from cylinder head and cylinder block deck surface.
  2. Check cylinder bore wear, taper and out-of-round. Cylinder bore diameter is measured .39" (10 mm), 2.36" (60 mm) and 3.94" (100 mm) from top of cylinder bore. Different cylinder bores are used and can be identified by No. 1, 2 or 3 grade number stamped on deck surface in accordance with cylinder location. See Figure .
  3. Cylinder block can be bored if cylinder bore, taper or out-of-round are not within specification. See CYLINDER BLOCK  table. Pistons are available in .0079" (.200 mm) oversize.
    CAUTION: Ensure main bearing caps are installed with bolts tightened to specification when boring cylinder block.
  4. Ensure main bearing bore I.D. is within specification with main bearing caps installed and bolts tightened to specification. See CYLINDER BLOCK  table.
NOTE: Main bearing bore I.D. will depend on main bearing journal grade number stamped on top of cylinder block. See Figure . Main bearing journal grade number may be 0, 1, 2 or 3.
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