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
1. 0.08 mm {0.0031 in}
  
  Fig 1: Measuring Cylinder Block Top Surface 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 out-of-round, replace the cylinder block.
Cylinder Bore
1. 89.000-89.030 mm {3.5039-3.5051 in}
Maximum Taper
1. 0.020 mm {0.00079 in}
Out-Of-Round
1. 0.020 mm {0.00079 in}
  
  Fig 2: Measure The Cylinder Bore Taper
  Courtesy of MAZDA MOTORS CORP.