Cylinder Block Inspection

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Measure the distortion of the cylinder block top surface in the six directions as indicated in the figure.
- If not as specified, replace the cylinder block.
  Cylinder Block Maximum Distortion
  
  0.08 mm {0.0031 in}
  
  Fig 1: Measuring Cylinder Block Distortion
  Courtesy of MAZDA MOTORS CORP.
Measure the cylinder bores in X and Y directions at 50 mm {2.0 in} below the top surface.
- If the difference between measurements A and C exceeds the maximum taper, replace the cylinder block.
- If the difference between measurements X and Y exceeds the maximum distortion, replace the cylinder block.
Cylinder Bore

89.000-89.030 mm {3.5039-3.5051 in}

Fig 2: Measuring Cylinder Bore Taper
Courtesy of MAZDA MOTORS CORP.

Maximum Taper

0.020 mm {0.00079 in}

Off-Round

0.020 mm {0.00079 in}