| 1. Visually check existence on the block of cylinders of cracks and traces of corrosion. Check a condition of carvings in openings, note places with the stripped thread. If there were suspicions on leak of cooling liquid in the block of cylinders, then the block should be tested for tightness for what it is necessary to address in a workshop. At detection of defects repair the block (if it is possible), or replace. |
| 2. Check existence of chips and zadir on the internal surfaces of cylinders. Check existence of a fillet in the top part of the cylinder which indicates the increased wear of the cylinder. |
| 3. Check existence of chips and zadir on the internal surfaces of cylinders. |
| 4. Measure the internal diameter of the cylinder in 10 mm from edge of the cylinder parallel to and perpendicular to an engine axis. Repeat measurements at distances of 60 and 100 mm from edge of the cylinder. By results of these six measurements define conicity and ovality of the cylinder. |
Prevention
Designation of dimensional group is put with stamping in the basis of the block of cylinders from a flywheel. Two sets of designations - from four figures which indicate belonging of internal diameter of the cylinder to this dimensional group, and the fifth figure which belongs to beds of radical bearings of the crankshaft in the block of cylinders are put. The first in designation for cylinders indicates dimensional group of the 1st cylinder, and the 4th – dimensional group of the 4th cylinder (see rice. Designation of dimensional groups of cylinders and radical bearings of the crankshaft).
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| 5. Check a condition of pistons and rings. Define a gap between the piston and the cylinder as a difference of the measured diameters of the cylinder and piston. |
| 6. Compare results to standard. If any of the measured values goes beyond standard limits, then the cylinder needs to be chiseled under the next repair diameter and if it is impossible, then the block of cylinders should be replaced. To take the most correct further actions, consult at the expert. |
| 7. If a condition of pistons and cylinders satisfactory, and wear such is that the gap between the piston and the cylinder within norm, then is required only replacement of piston rings. |
| 8. In this case cylinders are exposed only to a honningovaniye which provides the best to extra earnings of piston rings and their tight prileganiye to walls of cylinders (it is carried out at car repair shop). |