ENGINE 273 MPFI 127 ENGINE INSPECTION & REPAIR DATA CYLINDER BLOCK: • Distortion of gasketed surface By the samemethod that is prescribed for checking the distortion of the gasketed surface of the cylinder head, check the top face of the cylinder block for distortion and, if the distortion is found to exceed the limit, machine the face with a surface grinder. DISTORTIONOF GASKETED SURFACE STANDARDVALUE LIMIT 0.02 mm 0.05 mm CYLINDERBLOCKHEIGHT 242 mm • Cylinder bore Clean the cylinder bore thoroughly. Check cylinder bore diameter, taper and ovality. Using a cylinder bore gauge, measure the diameter of each bore in two directions, longitudinal and transverse, at three places, top, middle and bottom, to obtain a total of 6 readings. On the basis of these readings taken on each bore, determine whether the maximum difference in diameter between any two bores exceeds the limit. If the limit, stated below, is exceeded or if the bore wall is badly scored or burned, re-bore all cylinders to the next oversize and use oversize pistons in engine reassembly. If any one of the two cylinders has to be re-bored, rebore both the cylinders to the same next oversize. This is necessary for the sake of uniformity and balance. BOREDIAMETER STANDARDVALUE WEAR LIMIT A 73.495 to 73.505 mm 73.555 mm B 73.505 to 73.515 mm 73.565 mm C 73.515 to 73.525 mm 73.575 mm REBORINGDIAMETEROF CYLINDER STANDARDVALUE OVERSIZE (0.25) A 73.495 - 73.505 mm P1 73.745 - 73.755 mm B 73.505 - 73.515 mm Q2 73.755 - 73.765 mm
RkJQdWJsaXNoZXIy MTIwNTUz