| 1. Clear traces of old laying and hermetic from a head of the block of cylinders. |
| 2. Clear a deposit from the chamber of combustion and cylinders, then wash up a head of the block of cylinders the corresponding solvent. |
| 3. Clear channels in a head of the block of cylinders with use of a wire brush. |
| 4. Carefully check a head on existence of cracks and other damages. In the presence of cracks on a head it is subject to replacement. |
| 5. Using a metal ruler and щуп, check planeness of an interfaced surface of a head. |
| 6. Saddles of valves with wear tracks or a podgoraniye are necessary for processing with obligatory preservation of corners and facet sizes. |
| 7. If the saddle of the valve is necessary for processing, define the maximum quantity of metal which it is possible to remove. If the excessive amount of metal is removed, hydraulic pushers cannot correctly work. |
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8. Insert the valve in directing and press it to a valve saddle. Measure distance (and) from the end of a rod of the valve to the top surface of a head of the block of cylinders. The minimum admissible distance – 33,8 mm for inlet valves and 34,1 mm for final valves. At excessive wear of a saddle of the valve processing is inadmissible and it is necessary to replace a head of the block of cylinders. |
| 9. After any processing of saddles of valves it is necessary to make their grinding in. |
| 10. Check internal diameters of directing valves. If values exceed the most admissible size, it is necessary to replace directing valves in special repair shop. |
Prevention
Replacement of the directing demands also repolishing of a nest of the corresponding valve.
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| 11. Check a plate of each valve on dot corrosion, burned, cracks and the general wear. |
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12. If a condition of the valve satisfactorily, measure diameter of a core of the valve, in several points using a micrometer. Any essential distinction in the received data of measurement of a core of the valve indicates wear of a core. In that case the valve is subject to replacement. |
| 13. If valves are in a satisfactory condition, it is necessary to make their grinding in. Grinding in of valves is necessary for making only with application of fine-grained polishing paste. A surface of a saddle of the valve grease with a small amount of paste and establish the valve in the corresponding saddle. Densely press to a plate of the valve a rubber sucker and rotate the valve in one or other party. |
| 14. After the completion of process of grinding in all details carefully clear of dirt and paste. Check a saddle and a plate of the valve. The continuous opaque ring on both details which specifies width of a facet of the valve should be visible. |
| 15. Check valve springs on wear and stratification, and also measure their length in a free condition. If there is a possibility, compare each of existing springs to a new spring. |
| 16. Establish springs on a flat horizontal surface and check their deviations from horizontal situation. If though one of springs is damaged, replace completely all springs in a set. |
| 17. Check a condition of crackers of the valve, and also an installation site of crackers on the valve. In the presence of any defects the damaged details should be replaced. To Maslootrazhatelnye caps are subject to replacement each time after their removal. |
| 18. Check details of the klapanny mechanism and hydraulic pushers. |