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Kia Sportage>> Engine>> Diesel models>> Service of a head of cylinders and components of the gas-distributing mechanism
Service of a head of cylinders and components of the gas-distributing mechanism
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This procedure is among those which performance does not demand removal of the engine from the car. |
Details of installation of a head of cylinders and accompanying components
Design of a head of cylinders
Scheme of the organization of a drive of valves
Dismantle and service of components
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Dismantle all procedures stirring to performance components (see an illustration
the Order of dismantle of components at removal of the power unit), - address to materials of appropriate sections in this chapter, and also Heads of System of cooling, heating, ventilation and air conditioning, the Power supply system, management of engine/decrease in toxicity of the fulfilled gases and production of the fulfilled gases and Systems of electric equipment of the engine.
Remove a gas-distributing belt (see. The section Check of a condition and replacement of a belt of a drive of GRM in Head the Current leaving and service) and components of a drive of GRM (see. Section Removal and installation of components of a drive of GRM).
Disconnect from a head of cylinders the inlet pipeline and a final collector.
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Operating strictly in a certain order, release bolts of fastening of a head of cylinders. Finally turn out fixing bolts and remove a head, previously обстучав on joint perimeter with the block a hammer with soft the brisk. Remove sealing laying of a head.
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Remove nozzles with toplivootvodny tubes (see. Power supply systems, managements of engine/decrease in toxicity of the fulfilled gases and production of the fulfilled gases).
Turn out and remove glow plugs, remove their electroconducting (see. Head Current leaving and service).
Examine a head on existence of traces of development of leaks, cracks, cavities in interfaced surfaces and other mechanical damages. With the help щупа lezviyny type and a planeness measuring instrument (the steel ruler put on an edge) estimate extent of deformation of cylinders interfaced to the block, the inlet pipeline and a final collector of surfaces of a head. Compare results of measurements to requirements of Specifications of Head the Engine. The defective head is subject to replacement.
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Restoration of planeness of interfaced surfaces of a head of cylinders by their machining is not admissible at all! |
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Operating strictly in a certain order, release bolts of fastening of covers of bearings of a camshaft.
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Remove covers and take a camshaft.
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Take pushers of valves with adjusting washers, - at assembly all components should be established strictly on the former places.
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Carefully wipe beds of bearings in a head and covers, then lay a camshaft on the regular place and measure its size axial люфта.
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By means of Plastigage set serially define sizes of working gaps in camshaft bearings, - track correctness of an arrangement of covers observance of requirements of Specifications of Head the Engine to efforts of a tightening of their fixture.
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The tightening of bolts should be made as it should be, the return to an order of their otpuskaniye. |
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At installation of covers during performance of procedure of measurement of gaps in bearings track correctness of their arrangement.
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Compare results of the made measurements to requirements of Specifications of Head the Engine, in case of need replace a shaft and/or a head.
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By means of a plunzherny tsiferblatny measuring instrument (DTI) define vystupaniye sizes over a surface of head/depth of landing in a head of loose leaves (1) chambers of combustion, - if the result any of measurements falls outside the limits an admissible range (see. Specifications of Head the Engine), replace loose leaves/head.
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By means of special adaptations compress a spring of the first valve and take from a flute on its core crackers of the cutting lock. Dismantle adaptations and take a spring with plates and the valve. Operating in a similar manner, remove components of the remained valves.
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By means of special nippers remove maslootrazhatelny caps of directing plugs of valves.
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Cap capture by nippers is possible only after extraction of the bottom plate of a klapanny spring. |
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In case of need, operating from the back party of a head, by means of a suitable drift beat out loose leaves of chambers of combustion, try not to lose fixing balls.
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With the help щупа lezviyny type measure depth of landing of the valve in a head of cylinders. The nominal rate of depth of landing of valves (both inlet, and final) makes 0.75 ? 1.05 mm. If the result of measurement lies within a range of 1.55 ? 2.55 mm, establish on a plate of a klapanny spring an equivalent washer. If depth of landing of the valve exceeds value of 2.55 mm, it is necessary to replace a head of cylinders.
Estimate a condition of the valves removed from the engine. In case of identification of signs of wear, deformations and other mechanical damages of plates or cores replace defective components.
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Insignificant teases can be removed from surfaces of cores by means of a grinding stone. |
Grease a klapanny saddle with a thin layer of lead minium and, without rotating, press to it a plate of the valve. Take the valve and on left on a surface of its working facet to a trace estimate density of its pressing to a saddle.
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In case of violation of uniformity of a spot of contact, or an exit of its width out of limits of an admissible range (1.7 ? 2.3 mm) the saddle should be proshlifovano a grinding nozzle for the purpose of removal задиров and agnails, or is subjected to machining with application of special cutters with working corners in 15, 45 or 60 degrees. During processing regularly repeat quality check of a prileganiye of the valve.
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Make grinding in of valves to saddles in a head of cylinders, - as pritirochny means the special melkodispersny abrasive paste mixed in impellent oil is used. Try not to allow mix hits on a valve core. After grinding in implementation the spot of contact should have a form of the continuous ring located in an average part of a working facet of a plate. From this point each valve should be unequivocally adhered to the saddle, - this fact should be taken into consideration at assembly.
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By means of a micrometer measure diameters of cores of valves. Results of measurements write down.
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Having armed with a nutromer (1), measure internal diameters of directing plugs of valves.
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By subtraction of results of the first series of measurements from the corresponding results of the second series define size люфтов landings of valves in directing plugs. Compare results of calculations to requirements of Specifications of Head the Engine, in case of need replace directing plugs.
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By means of the special adaptation beat out directing plugs from the landing nests in a head aside opposite to the party of placement of chambers of combustion.
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Plant on the new directing plug a lock ring and by means of the special adaptation begin to knock the plug in a landing nest in a head, operating from outside to the opposite side of placement of chambers of combustion, - the lock ring should disappear completely in a landing nest.
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Pay attention to constructive differences between directing plugs of inlet and final valves. |
Having finished installation of new directing plugs, repeat measurement люфтов landings in them the corresponding valves.
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Installation of maslootrazhatelny caps should be made after completion of adjustment of valves. |
Attentively study a condition of klapanny springs, - in case of identification of chips, cracks and other mechanical damages replace defective components.
Measure free length of springs, estimate extent of violation of a tortsovka, - at excess by result of any of measurements of limiting admissible value (see. Specifications of Head the Engine) replace the corresponding spring (ы).
Measure external diameters of pushers, write down results of measurements. If the result of measurement falls outside the limits an admissible range replace the corresponding component.
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Measure internal diameters of nests (2) under landing of pushers (1) in head molding. Write down results. By subtraction of results of the first measurements from results of the second define sizes landing люфтов pushers. Compare results of measurements to requirements of Specifications of Gdava Dvigatel, in case of need replace corresponding pushers/head of cylinders.
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Make measurement of height of cams of a camshaft, - if the result any makes of measurements less than the Head stipulated in Specifications the Engine of limiting admissible value, it is necessary to replace a shaft.
Measure diameters of bearing necks, check them on existence and ovality. Compare results of measurements to requirements of Specifications of Head the Engine, in case of need replace a shaft.
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Lay a shaft in prisms and by means of a measuring instrument of DTI check it on bend existence. If the result of measurement exceeds limiting admissible value, replace a shaft.
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Assembly
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Assembly is made upside-down. Track, that all adjusted and ground-in components were established strictly on the places.
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When landing maslootrazhatelny caps use special оправко, - do not forget to grease caps with impellent oil previously.
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Before filling them in directing plugs it is also necessary to grease cores of valves, - use molibdensoderzhashchy greasing, when landing crackers of cutting locks use special adaptations.
At installation of adjusting washers do not forget to put oil on face surfaces of pushers.
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At installation of a camshaft grease his necks and a bed of bearings with pure impellent oil, remember that landing of covers of bearings of a camshaft should be made on hermetic.
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The tightening of fixing bolts of covers is made after installation of an epiploon of a camshaft and as it should be, the return to an order of their otpuskaniye.
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Having established a camshaft, make final assembly of a head, having planted on it hinged components. Track purity of interfaced surfaces of a head, the inlet pipeline and a final collector, do not forget to replace sealing laying.
At installation of NEW sealing laying of a head track correctness of its placement on the block.
Before a vvorachivaniye of bolts of fastening of a head measure their length, - excessively extended bolts (see. Specifications of Head the Engine) are subject to replacement. The tightening of bolts should be made in stages (see. Specifications of Head Engine) as it should be, the return to an order of their otpuskaniye.
Installation of the remained components is made as it should be, the return to an order of their removal (see appropriate sections in this chapter and the Section Check of a condition and replacement of a belt of a drive of GRM in Head the Current leaving and service).
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