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Cylinder Head Inspection

  1. Clean sealing surfaces. Inspect cylinder head gasket and mating surfaces for leaks, corrosion, and blow-by. Inspect cylinder head for cracks. Inspect length and width of cylinder head using a feeler gauge and a straight edge.
  2. Check sealing surfaces for deformation and warpage. The cylinder head sealing surfaces must be flat within .025 mm (.001") maximum. Measure height of cylinder head from sealing surface to sealing surface. The cylinder head height should be 133.975 to 134.025 mm (5.274 to 5.276"). If cylinder head height is less than 133.9 mm (5.271"), replace cylinder head. Inspect all threaded holes for damage. Inspect valve seats for excessive wear and burned spots.
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