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1. Examine block moulding on presence of cracks and corrosion traces. Check up, whether the carving in any of fixing apertures is broken. If there were suspicions on internal leaks of a cooling liquid, probably, it makes sense to address to experts of car-care centre, having asked them to execute careful check of a condition of the block with application of the special equipment. In case of need make regenerative repair, or replace the block. |
2. Take sleeves of cylinders and check up their mirrors on presence of scratches and задиров. For the purpose of keeping of industrial admissions sleeves of three dimensional groups are issued. Corresponding marks are put a wall of each of sleeves.
3. It is necessary to make measurement of their diameters for more exact estimation of degree of deterioration of sleeves in several points. Enter нутромер into a sleeve of the first cylinder and measure its diameter in three various sections in parallel an axis of a cranked shaft. One measurement is made in the top part of a sleeve, the second is direct under edge of a fillet of the step deterioration, - in the central part of a sleeve and the third - at once over its bottom cut. Measurements are made in two planes - a parallel and perpendicular axis of a cranked shaft.
4. Compare results of measurements to requirements of Specifications. If any of results falls outside the limits the admissible range, the corresponding sleeve is subject to replacement.
5. For definition of a backlash of landing of pistons in sleeves of cylinders it is necessary to subtract diameter of the piston measured on its skirt (see Has undressed Removal, check of a condition and installation of shatunno-piston assemblages) from diameter of a sleeve.
6. Alternatively, fill the piston in a corresponding sleeve and with the help probeа лезвийного type measure size люфта its landings. The piston should be entered into a sleeve in normal position, and люфт is measured on one of its persistent surfaces, is direct over the bottom cut of a sleeve.
7. If the backlash size exceeds the admissible value stipulated in Specifications, it is necessary to make piston replacement. If the piston клинит in the bottom part of a course, with gradual weakening of landing in process of its advancement upwards, means takes place конусность sleeves. Jamming of edges probeа at its displacement on perimetre of a forming surface of the piston speaks about ovality of a sleeve.
8. Repeat procedure, having estimated a condition of sleeves of each of cylinders.
9. In case of revealing of signs of excessive deterioration, or damages of mirrors, defective sleeves are subject to replacement.
10. As the replaceable sleeves, only the same dimensional group, as failed should be established. The same concerns pistons. Thus the size of pistons should correspond on group to the size of sleeves. Corresponding marks are put on walls of sleeves and the bottom of pistons.
11. If degree of deterioration of mirrors is low, will spend only replacement of piston rings enough.
12. Mirrors of sleeves thus are subject хонингованию for the purpose of maintenance of correctness of landing to them of new piston rings.
13. For procedure performance хонингования the special tool (хон) is required, allowing to put on a mirror surface uniform shaped a pattern in the form of a grid. Such uniform “загрубление” mirrors quality provides extra earnings of piston rings and guarantees due tightness of landing of pistons in sleeves. Both are issued хоны two types, intended for use complete with an electrodrill. Хон type “bottle ершик” represents a rigid cylindrical brush with abrasive inserts in a bristle. More widespread superficial хон it is equipped by a nozzle in the form of the grinding stones equipped подпружиненными with legs. Composers of the given Management recommend to beginning mechanics-fans to take advantage хоном the first type.
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At desire хонингование always it is possible for quite reasonable payment to charge to experts of a workshop of car-care centre. |
14. Prepare хон one of described above types, an electrodrill, enough of pure rags, it is a little хонинговочного oils and goggles.
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15. Clamp хон in an electrodrill cartridge. Moisten mirrors of cylinders хонинговочным with oil and fill хон in the first sleeve, preliminary having compressed it подпружиненные grinding stones (if the nozzle of the second type is used). Include a drill and at once start to move a nozzle upwards-downwards on the cylinder, achieving occurrence on a mirror of the cylinder of a uniform shaped pattern in the form of a grid with ромбообразной ячеей which parties are crossed at an angle nearby 60 °. Some manufacturers of piston rings insist on other values of corners of crossing of strokes of a pattern - familiarise with the instructions applied on a set of new piston rings.
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Do not forget to put on goggles! |
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16. Do not feel sorry some oil at хонинговании cylinders. Do not remove from a mirror of a sleeve of more material, than it is really necessary for achievement of demanded result. Do not take хон from a sleeve until its rotation definitively will not stop - all this time continue to make back and forth motions by a drill. After a drill stop, continue rotation of its cartridge in a former direction manually and take a nozzle from the cylinder.
17. Carefully wipe a mirror pure rags and pass to хонингованию sleeves of the following cylinder. Having finished procedure, wash out the block of cylinders hot water with soap, completely having removed all traces of an abrasive and хонинговочного oils. It is possible to consider cleaning finished when at carrying out on mirrors of sleeves the white rags moistened in oil on last does not remain stains of grey colour.
18. For extraction of sleeves turn the block of cylinders and lay it on wooden blocks. Now sleeves can be beaten out from cylinders with the help выколотки, made of firm wood.
19. After all sleeves will be liberated, lay the block of cylinders sideways and take sleeves manually.
20. Remove from the bases of sleeves sealing washers and measure their thickness. Washers of the various sizes are issued and by their selection size updating выступания sleeves over a block surface is carried out. Pick up replaceable washers for each of sleeves.
21. The basic geometrical characteristics of sleeves are presented on illustrations. If sleeves are in good repair and are subject to the further use, mark them by means of an adhesive tape about an accessory to the cylinder.
And — the Designation of a dimensional class of a sleeve
b — the Place of measurement of internal diameter
22. Before installation carefully wipe interfaced surfaces of sleeves and a side, then by processing by a fine-grained emery paper remove all agnails, teases and the roughnesses, capable to lead to failure of new sealing washers.
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23. Carefully wipe sleeves and establish on them new sealing washers of a demanded thickness. Grease walls of sleeves with pure impellent oil. |
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24. At installation of old sleeves watch correctness of combination of the landing labels put in the course of dismantle. Try not to admit loss of sealing washers in the course of landing of sleeves in cylinders. At the first stage of a sleeve it is necessary to push in cylinders manually against the stop. Further sleeves застукиваются a hammer through the wooden block against the stop in a landing coat hanger. |
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25. Having established all four sleeves, measure their size выступания over a block plane - take advantage of a steel ruler and probeом лезвийного type. Compare results of measurements to requirements of Specifications. |
26. In case of need take incorrectly planted sleeve and replace on it a sealing washer. Washers are issued by thickness 0.10, 0.12 and 0.14 mm.
27. Having replaced a washer, establish a sleeve and again check up its size выступания.
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28. Having finished updating of landing of sleeves, temporarily fix them in cylinders special rectangular washers |
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