Cylinder Block Inspection/Repair

Measure the distortion of the cylinder block top surface in the 6 directions as shown. Repair by grinding or replace as necessary.
Maximum Cylinder Block Distortion

0.05 mm {0.002 in}

Cylinder Block Height

270.9-271.1 mm {0.666-10.673 in}

Maximum Grinding

0.20 mm {0.008 in}

Fig 1: Checking Cylinder Block Distortion
Courtesy of MAZDA MOTORS CORP.
Measure the cylinder bores in "X" and "Y" directions at 67 mm {2.64 in} below the top surface.

Fig 2: Measuring Cylinder Bores
Courtesy of MAZDA MOTORS CORP.
If the cylinder bore exceeds the wear limit, replace the cylinder block or rebore the cylinder and install the oversize pistons so that the specified piston-to-cylinder clearance is obtained.
NOTE: Base the boring diameter on the diameter of an oversize piston. All cylinders must be the same diameter.
Wear Limit

0.15 mm {0.006 in}

CYLINDER BORE SPECIFICATIONS