Pic. 2.329. Checking the cylinder block for warpage
Check the gas joint surface of the cylinder block for warpage using a precision ruler and a flat feeler gauge (pic. 2.329).
Maximum warpage - 0.07 mm.
If warpage exceeds the specified value, replace the cylinder block or grind it.
Check the cylinder mirror for vertical scratches. If there are deep scratches, then bore the cylinder block to the repair size or replace the cylinder block.