Citroen Xantia

1. Measurement of size axial люфта a cranked shaft is made before extraction of last of the block of cylinders, right after its clearings (Removal of a cranked shaft see).

2. Check axial люфта can be made by means of standard циферблатного a measuring instrument плунжерного type. Push a shaft against the stop in the engine, then null a measuring instrument, плунжер which should be pressed to an end face of a forward pin of a shaft. Now shift a shaft against the stop in an opposite side and consider an instrument reading. Compare result of measurement to requirements of Specifications for the purpose of definition of necessity of replacement of persistent washers.

3. At absence near at hand циферблатного a measuring instrument the size axial люфта can be defined with the help probeа лезвийного type. Shift a cranked shaft for all length of its course towards a disk flywheel/privodnogo, then probeом measure backlash size between a cheek of the second crank and a face surface of a persistent washer.

1. Wash out a cranked shaft in kerosene or other suitable solvent, then dry it, it is preferable with application of compressed air. Make sure of absoluteness of cleanliness of oil apertures, check up their passableness. In case of need take advantage of a rod brush or the special adaptation for procleaning of pipes.

At use of compressed air do not forget to put on goggles!

2. Check up radical and шатунные shaft necks on presence of cracks, задиров, deep scratches, cavities and signs of non-uniform deterioration.
3. A sign of deterioration of necks шатунных bearings is the distinct metal knock published at work of the engine and especially appreciable on small turns. Besides, deterioration шатунных bearings is usually accompanied by oil pressure decrease.
4. The gnash and strong vibrations of the engine usually testifies to deterioration of radical bearings at its work, amplifying in process of increase of turns. Pressure of oil also falls a little.
5. To the touch estimate smoothness of working surfaces of necks of a shaft. Roughness presence speaks about deterioration of bearings and specifies in necessity of performance проточки a shaft or its replacement.
6. Check up edges of oil apertures of a shaft on presence of agnails (usually apertures slightly раззинкованы that is why, this sort of problem arises usually only at inaccurate performance проточки necks). Remove defects, having processed edges of apertures a file with a small tooth or a scraper, then once again carefully wash out маслотоки.

7. By means of a micrometer measure diameters of all radical and шатунных shaft necks. Compare results of measurements to requirements of Specifications. Measurement of diameter of necks in several points will allow to reveal signs of non-uniformity of deterioration. The difference in diameters measured in a plane of one section, but under 90 ° to each other defines size of ovality of a neck. The difference between the values which have been removed in various sections of a neck, characterises конусность last. In case of revealing of deterioration of necks leaving for admissible limits the shaft, besides, is subject проточке or replacement (consult with experts of car-care centre).

8. Check up a condition of surfaces of both pins of a cranked shaft contacting to epiploons. Presence of defects can lead to failure of new epiploons. There are ways of restoration of sealing surfaces of pins, - consult on a car repair shop. In case of impossibility of carrying out of regenerative repair the shaft is subject to replacement.
9. At the moment of drawing up of the present Management the information on release by company Citroyon of loose leaves of bearings of the repair sizes for each of types was absent. On models for which such loose leaves are issued, the shaft can be in case of need pierced, and loose leaves of bearings are replaced new, the corresponding repair size (Installation of a cranked shaft and check of working backlashes of radical bearings see). If possibility in acquisition of repair loose leaves is absent, the shaft in case of deterioration of its necks below an admissible limit is subject to replacement. Address for consultations to experts of the services-centres of company Citroyon.