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Citroen Xantiasince 1993 of releaseRepair and car operation |
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Citroen Xantia + Introduction + Operation manual + Routine maintenance - Engine repair - The repair procedures which are not demanding extraction of the engine from the car - petrol engines Check of kompressionny pressure in cylinders Fixing cranked / distributive shaft for the purpose of prevention casual in the course of performance of procedures of service of the car Removal and installation of a cover of a head of cylinders Removal and installation of a pulley of a cranked shaft Removal and installation of covers of a gas-distributing belt Belt of a drive of GRM - the general information, removal and installation Removal, check of a condition and installation of a natyazhitel and cogwheels of a gas-distributing belt Epiploon replacement (ов) camshaft Removal, check of a condition and installation of a camshaft and pushers of valves Check and adjustment of klapanny gaps Removal and installation of a head of cylinders Removal and installation of the pallet of a case of the engine Removal, check of a condition and installation of the oil pump Removal and installation of a maslookhladitel (model of 2.0 l) Replacement of epiploons of a cranked shaft Removal, check of a condition and flywheel installation / driving disk Check of a condition and replacement of support of a suspension bracket of the power unit + the Repair procedures which are not demanding extraction of the engine from the car - diesel engines + Removal and major maintenance of the engine + Systems of cooling, heating + Power supply system and release + engine Electric equipment + Coupling + Transmission + Power shafts + Uniform hydraulic system + Brake system + Running gear and steering + Body and salon furnish + Onboard electric equipment + electric equipment Schemes 
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The repair procedures which are not demanding extraction of the engine from the car - petrol engines General information This part of Head Repair of the engine is devoted to procedures of repair of petrol engines of the XU series, not connected with unit extraction from the car (in situ). If the engine is already removed and prepared for dismantling for the purpose of performance of the general major maintenance (see. Removal and major maintenance of the engine), all preparatory procedures which were mentioned below can be lowered. Despite basic possibility of performance of in situ of repair of such components as shatunno-piston assemblies, it is necessary to remember that this sort of works are accompanied always by a set of additional procedures (without speaking about need of carrying out cleaning of components and маслотоков). In view of told, such works are classified as procedure of the general major maintenance of the engine and are considered in the section Removal and major maintenance of the engine where the detailed description of procedures of removal and installation of the power unit also is provided. Petrol engines of the XU series - the general description Perfectly proved throughout rather long term well-known in the world engines of the XU series are used for a complete set of a wide range of models of cars of the Citroёn brand. XU units belong to family of ryadny 4-cylinder engines and are established cross-section in a forward part of the car. Assemblies of coupling and transmission fasten in the left part of the unit. The cranked shaft is planted in five radical bearings. Supervising axial люфт a shaft persistent washers are established in a cover of the second radical bearing. Shatunno-porshnevye assemblies rotate on the cutting bearings of sliding equipped with two loose leaves placed in their bottom heads. For fastening of pistons metal fingers are used planted внатяг in the top heads of rods. Pistons are made of an aluminum alloy and equipped everyone with three piston rings - two kompressionny and one maslosjemny. On models 1.6 and 1.8 of l the block of cylinders of "wet" type equipped with sleeves is used. Actually the block is cast from aluminum, in nests of its cylinders pig-iron sleeves at the top are filled. In the basis of each sleeve the sealing rings preventing leaving of cooling liquid in the pallet of a case are provided. Models of 2.0 l are completed with traditional engines of "dry" type. In this case the block is made of pig-iron molding, landing in which cylinders of separate sleeves is not provided. The camshaft drive on all models is carried out from a cranked shaft by means of zubchatoremenny transfer. Under each of ekstsentrikovy cams of a camshaft the individual pusher through which the drive of eight valves of chambers of combustion is carried out is established. Installation of klapanny gaps is carried out by selection of the adjusting washers established between pushers and end faces of cores of valves. The camshaft rotates in the bearings, which covers приболчены to the top plane of a head of cylinders. Closing both inlet, and final valves is carried out by means of screw springs. The course of valves is supervised pressed in a head of cylinders by directing plugs which (as well as saddles of valves) are among dismantled components and in case of wear are subject to replacement in an individual order. The drive of the block of cylinders of the water pump established on the right side is carried out from a gas-distributing belt. The internal pressure in system of greasing is created by the oil pump put in action from the right end of a cranked shaft by means of chain transfer. The pump soaks up oil via the mesh filter from the pallet of a crater of the engine, and then banishes it via the replaceable polnopotochny oil filter and submits to internal galleries of the block of cylinders/case of the engine. On galleries oil arrives to cranked (radical bearings) and distributive to shaft. To shatunny bearings of a cranked shaft it is forced through special drillings in a shaft body. In camshaft bearings oil moves also under pressure. Greasing of cams of a camshaft and valves, no less than other internal components of the engine, is carried out by an oil razbryzgivaniye. On 2.0 l some of models the special maslookhladitel, allowing to maintain temperature of engine oil at the set level in the most intense service conditions of a vehicle is provided. Maslookhladitel is established behind the oil filter, as a working body in it liquid of system of cooling of the engine is used. In the course of the description of many of procedures of maintenance there is a need for division of engines not only on their working volume, but also on an identification code. The code of the engine is formed by three letters of the Latin alphabet (for example, LFZ). On l models 1.6 and 1.8 the code of the engine is beaten out on шильде, the left wall of the block of cylinders fixed in a forward part. On models of 2.0 l the code is beaten out directly on a forward wall of the block, on specially pierced platform to the left of the oil filter (near the union of a hose of system of ventilation of a case). The list of the procedures, which performance does not demand engine extraction from the car To number of the procedures which are not demanding extraction of the engine from the car, the following belongs: |
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