2. First of all, check that the sleeves are not skewed. For this, a dial device is connected, which is installed on the contact surface of the cylinder block. Using a gauge, measure the top edge at five independent points and check that the surface of the cylinder block is parallel. The maximum allowable deviation is 0.02 mm.
3. Check the amount of protrusion of each sleeve above the cylinder block using a ruler and a set of probes. Place a ruler against the surface of the liner so that it is perpendicular to the crankshaft, and measure the gap between the ruler and the surface of the cylinder block. If checking after installing new sleeve gaskets, press the sleeve to compress the gasket before inserting the feeler gauge. Measure the gaps in the front and rear of the sleeve - they should not go beyond the established limits. Make measurements for all - cylinders. After installing new gaskets, it is allowed to tap the sleeves on the upper edge so that the gaskets fall into place, and then measure the amount of protrusion again.
4. Check the difference in height between adjacent sleeves using a dial gauge. Liner height is measured along a central axis parallel to the crankshaft. The difference in height between adjacent sleeves must not exceed the maximum allowable limits.
5. The three above checks (parallelism of the surface of the sleeve to the cylinder block, the amount of protrusion and the difference in height between adjacent sleeves) must be carried out sequentially, and the next test can only be passed after making sure that the previous one gave the correct results. If, for example, you find that the sleeve is skewed beyond the allowable limit, the cause of this must be identified and eliminated (it might just be a bug of the instrument, so you need to check it first). The cause of the skewing of the sleeve may be its deformation (it is most likely that the check is made with the engine on the machine) or foreign objects between the sleeve and the block (most likely if the check is made after a complete overhaul of the engine).
6. If the checks on the engine standing on the machine gave unsatisfactory results, it is necessary to replace the lining gaskets or even one or more liners. In any case, to do this, you will have to remove the engine from the gearbox.
7. If the checks are satisfactory, you can continue with the assembly or, if necessary, install temporary metal strips to hold the cases in place. It is forbidden to turn the crankshaft unless measures are taken to prevent the sleeves from moving. If you are not going to continue working immediately, cover the engine so that dirt does not get into it.