Check the mating surface of the cylinder block with a ruler and feeler gauge in length and width for deformation. In the entire length of the cylinder block of a gasoline engine, the deflection should be no more than 0.05 mm, and in a width of 150 mm - no more than 0.015 mm. The cylinder block of a diesel engine should have a deflection of no more than 0.1 mm.
Check the mating surface of the cylinder block diagonally for deformation.
After grinding, pay attention to the protrusion of the pistons from the cylinders. The piston can protrude max. 0.22 mm OHV engine 1.2-/1.3-l, 0.40 mm OHV engine 1.6-/1.8-l, 0.29 mm OHV engine 1.0- /1.2-l above the top edge of the cylinder block. In a diesel engine, the maximum is 0.78 mm.
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