Citroen Xantia

since 1993 of release

Repair and car operation


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
   + the Repair procedures which are not demanding extraction of the engine from the car - diesel engines
   - Removal and major maintenance of the engine
      Major maintenance of the engine - the general information
      Removal of the power unit - methods and precautionary measures
      Removal, partition and installation of the power unit - models with RKPP
      Removal, partition and installation of the power unit - models with AT
      Order of dismantling of the engine by its preparation for carrying out major maintenance
      Dismantle of a head of cylinders
      Cleaning and check of a condition of a head of cylinders and components of the klapanny mechanism
      Assembly of a head of cylinders
      Removal of shatunno-piston assemblies
      Removal of a cranked shaft
      Cleaning and check of a condition of the block of cylinders/case of the engine
      Check of a condition of shatunno-piston assemblies
      Check of a condition of a cranked shaft
      Check of a condition of loose leaves of radical and shatunny bearings of a cranked shaft
      Engine assembly order after performance of major maintenance
      Installation of piston rings
      Installation of a cranked shaft and check of working gaps of radical bearings
      Installation of shatunno-piston groups on the engine and check of working gaps of shatunny bearings
      Initial start of the engine after completion of its major maintenance
+ 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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Installation of a cranked shaft and check of working gaps of radical bearings

Selection of loose leaves

Petrol engines (XU series)

On some engines established on models of early years of release the top and bottom loose leaves of radical bearings of identical thickness are applied.

On later models the working gap in radical bearings was considerably lowered, for what began to use loose leaves of four various dimensional groups. The dimensional group of loose leaves is defined on put on edge of each of them to color marking. Thus the thickness of the loose leaf increases depending on color of marking in the order specified in the table provided below. It is necessary to pay attention also of the reader to that fact that the top loose leaves are used always the same thickness and the gap size in bearings is defined by thickness (dimensional group) only bottom loose leaves.

Engines 1580 and 1761 of cm 3

Color of marking

Thickness of the loose leaf, mm

The standard
The repair

Top loose leaf

   •  Yellow

1.856

2.006

Bottom loose leaves

   •  Dark blue (Class A)

1.836

1.986

   •  Black (Class B)

1.848

1.998

   •  Green (Class C)

1.859

2.009

   •  Red (Class D)

1.870

2.020

Engines of 1998 cm 3

Color of marking

Thickness of the loose leaf, mm

The standard
The repair

Top loose leaf

   •  Yellow

1.847

Data are absent

Bottom loose leaves

   •  Dark blue (Class A)

1.844

Data are absent

   •  Black (Class B)

1.857

Data are absent

   •  Green (Class C)

1.866

Data are absent

   •  Red (Class D)

1.877

Data are absent


On all engines of the XU series the top loose leaves of radical bearings easily differ from bottom on the flute provided in them. Surface of the bottom loose leaves always the smooth. At the moment of drawing up of the real Management data on the repair sizes of loose leaves of radical bearings for engines of 1998 cm 3 were absent, therefore at their selection it is necessary to address to experts firm Citroёn company service centers.

On the majority of models of the last years of release selection of replaceable loose leaves of radical bearings can be made on special marking. The marking containing information on diameters of beds of bearings is put on a face surface of the block of cylinders. At the same time on a cranked shaft the labels defining thickness of his necks are provided. If marking is absent, selection of loose leaves can be carried out only by a way of measurement of working gaps in bearings (see below).

On the block of cylinders marking is put on the left face wall from a flywheel / a driving disk. On a cranked shaft - on a cheek of an extreme crank. On the basis of the analysis of the data included in marking selection of replaceable loose leaves of radical bearings is made.

And — the Reference used only on production
In — Designations

Both markings consist of two ranks of data: the reference used on production and a code, consisting of five letters. The first letter designates dimensional group of the first radical bearing (located from a flywheel / a driving disk), the second - the second, etc. is designated by the last letter which the label in the form of an arrow follows dimensional group of the fifth bearing.


The card of a choice of loose leaves of the radical bearings used on petrol engines of the XU series

Selection of bearings is carried out as follows: Write out number of dimensional groups of a neck of a cranked shaft and a bed in the block for the first bearing and address to data of the special podborochny card (see an illustration the Card of a choice of loose leaves of the radical bearings used on petrol engines of the XU series). Pay attention that a horizontal number of figures/letters from above on the card defines dimensional groups of necks of a cranked shaft, and vertical, - groups of beds in the block. Find a cell of crossing of written-out numbers. The letter containing in this cell will designate demanded dimensional group of the bottom loose leaf of the corresponding radical bearing which installation will provide a demanded working gap. For example, if the corresponding neck of a cranked shaft is designated by number 6, and a bed in the block - a letter of N, it is necessary to complete this bearing with the bottom loose leaf with red marking (Class D).

Operating in a similar manner, define dimensional groups of the bottom loose leaves of the remained radical bearings.

To get replaceable loose leaves Citroёn company service centers is best of all through firm.

At performance of major maintenance of the engine on models of early years of release it is best of all to select replaceable loose leaves from new, equipped with a color code change. However, it is admissible only if the corresponding updating of system of greasing (with replacement of the piston of the reduktsionny valve, a chain and a driving asterisk of the oil pump is made. If updating of system of greasing is not made, it is necessary to establish the bottom loose leaves of the Class A (Dark blue marking). More detailed information can be received at car repair shops.

Diesel engines (XUD series)

On all diesel models radical bearings are completed with the top and bottom loose leaves of identical thickness. The Citroёn company lets out both that and others both standard, and the repair sizes.

Definition of a working gap of radical bearings

Petrol engines (XU series)

 PERFORMANCE ORDER

1. On models of early years of release pick up a set of new top loose leaves, then a set of new bottom loose leaves with dark blue marking (see above) if such possibility exists. On later models where the modified radical bearings are already established, check of gaps in them can be checked with old loose leaves though it will be impossible to consider result more exhaustively exact (better also to take a new set).
2. Wipe backs of the picked-up loose leaves and their bed in the block of cylinders and covers of bearings.
3. Enclose loose leaves in the beds, having tracked, that their uvulas entered into gearing with reciprocal grooves in a body of blocks/covers. At verification of old loose leaves track, that they were established strictly on the former places. Try not to touch working surfaces of loose leaves. Pay attention that in working surfaces of the top loose leaves the flute is provided, - do not mix them with the smooth bottom.
4. Check of size of a working gap of bearings is made by one of described below methods.
5. The first method which was more difficult in view of need of application of a micrometer and нутромера / Columbus, demands installation of covers of radical bearings (with the enclosed loose leaves) on the block. Tighten bolts of fastening of covers with demanded effort (during check of gaps of bearings old bolts are used), then нутромером / Columbus measure internal diameter of each of bearings. Now it is necessary to subtract diameters of the corresponding radical necks of a cranked shaft from the received results, - the received results will show values of working gaps in bearings. Compare results of calculations to requirements of Specifications.
6. The second method (simpler and exact) means application of a special measuring set of Plastigage (Citroёn No. OUT 30 4133 T). The size of a gap is determined by extent of flattening of pieces of the soft calibrated wire from a set at its szhimaniye between loose leaves of covers of radical bearings and shaft necks. Measurement of width of the flattened-out pieces of a wire is made on put on set packing to a scale.
7. Enclose the top loose leaves of radical bearings in the beds in the block of cylinders, then carefully lay in the block a cranked shaft. Do not use some any greasing! Necks of a shaft should be absolutely pure and dry.
8. Cut five pieces of a wire, on length is slightly shorter than radical necks of a cranked shaft and lay them along necks, parallel to an axis of the last.
9. Wipe working surfaces of the bottom loose leaves in covers of bearings and grease them with a thin layer of a silicone compound for the purpose of sticking prevention to them the calibrated wire. Establish covers on the regular places in the engine (be verified with factory marking). Screw old fixing bolts and, watching to breaking integrity of the flattened-out pieces of a wire, tighten them with demanded effort (see below in this section). Do not allow a provorachivaniye of a cranked shaft after laying on it the calibrated wire.
10. Remove covers, - again try not to destroy the flattened-out wire and not to turn a shaft.
11. On a scale put on packing of a set of Plastigage, determine size of a working gap of bearings by extent of flattening of the calibrated wire, remember that on packing two scales (inch can be put and metric), - do not mix them. Compare results of measurements to requirements of Specifications.
12. If the gap size essentially differs from demanded, check, whether dirt or other extraneous particles got under a loose leaf back. Wipe backs of loose leaves and their bed and repeat check. At repeated negative result check compliance of loose leaves to diameters of necks of a cranked shaft. If the calibrated wire appears flattened out from one end is inadmissible more than from another, the neck has a konusnost and is subject to a pro-point.
13. If results of measurements essentially differ from stipulated in Specifications, use the received data, and also data on thickness of loose leaves (see above) for definition of demanded dimensional group of new loose leaves. Remember that in bearings it is always better to establish working gaps closer to the bottom border of an admissible range adjusted for wear.
14. If necessary pick up new loose leaves from other dimensional group and repeat check of working zazhor in bearings.
15. In summary, having made sure of compliance of sizes of a working gap of bearings to standard requirements, remove traces of the flattened-out wire from shaft necks, having carefully scratched out them a nail or edge of an old credit card.

Diesel engines (XUD series)

Check can be executed on old loose leaves though it will be more preferable to make it with a new set. Follow the instructions provided above.

Final installation of a cranked shaft

All engines (XU and XUD)

 PERFORMANCE ORDER

1. Accurately take a cranked shaft from an engine case.

2. By means of pair of dabs of dense greasing fix the top half of persistent washers from both parties of a bed of the second radical bearing in the block of cylinders, - both washers should be established by flutes маслотоков outside.

3. Enclose loose leaves of radical bearings in the beds in the block of cylinders and covers. At installation of new loose leaves track, that from their surfaces preserving greasing was completely removed, - wash out loose leaves kerosene, then carefully wipe pure неворсящейся rags. Plentifully grease loose leaves in an engine case with pure engine oil of a demanded grade.

4. Lay a cranked shaft in the block of cylinders so that necks of the second and third cranks appeared in provisions VMT, and the first and the fourth, respectively, - NMT. According to instructions Check of a condition of a cranked shaft undressed, measure its size axial люфта.

5. Grease with impellent oil the bottom loose leaves in covers of bearings. Make sure of correctness of landing of uvulas of loose leaves in reciprocal deepenings in covers.

6. Establish covers of the second and fifth bearings on the regular places (deepenings under uvulas of loose leaves in beds of the block and covers should appear on the one hand. Get fixture (nuts/bolts) and freely tighten it.

7. Grease with hermetic interfaced to a cover of the 1st radical bearing a block surface, round openings under installation of sealing strips.

8. Get uvulas of sealing strips on pins in the basis of a cover of the first bearing and plant strips in the flutes in a cover. Now it is necessary to prepare two thin metal plates (less than 0.25 mm in thickness) for the purpose of fixing of sealing strips at cover installation.

9. The Citroёn company lets out the special adaptation working like a clamp, however, perfectly for this purpose will approach also pair of edges old measuring щупа (track that from their edges all agnails and the teases previously were removed, capable to damage rubber of sealants.

10. Grease with impellent oil both of the party of metal plates (if use plates) and establish them on sealing strips. Establish a cover of the first radical bearing on the engine and freely screw fixing bolts.

11. By means of flat-nose pliers take plates. Pull plates strictly horizontally.

12. Evenly tighten fixture of covers of radical bearings with demanded effort, then a sharp knife cut off acting edges sealing covers of the first bearing so that they acted over an interfaced surface of the block approximately on 1 mm.



13. On models 1580 and 1761 of cm 3 screw lateral bolts of fastening of the central radical bearing, - one in a forward part of the block and one in back, - do not forget about sealing washers. Tighten both bolts with demanded effort.
14. Establish a back epiploon of a cranked shaft (see. The repair procedures which are not demanding extraction of the engine from the car - petrol engines or the Repair procedures which are not demanding extraction of the engine from the car - diesel engines).
15. Establish on the places shatunno-piston assemblies (see. Installation of shatunno-piston groups on the engine and check of working gaps of shatunny bearings).
16. Establish a segment shponka in a groove of pins of a cranked shaft, then plant on a pin a leading asterisk of the oil pump with the remote plug (if that is provided). Throw an asterisk with a driving chain.
17. Dry wipe interfaced surfaces of the holder of a forward epiploon of a cranked shaft and the block of cylinders. Measure depth of landing of an epiploon, then take it from the nest by means of a screw-driver with a flat sting.
18. Grease with suitable hermetic an interfaced surface of the holder. Make sure available on the places of directing pins and plant the holder on a pin of a cranked shaft, having densely pressed it to the block. Tighten boats of fastening of the holder with demanded effort.
19. Operating according to the instructions stated in sections Repair procedures, not demanding extraction of the engine from the car - petrol engines or the Repair procedures which are not demanding extraction of the engine from the car - diesel engines, establish a new forward epiploon of a cranked shaft.
20. Make sure of correctness of landing on asterisks of a driving chain of the oil pump, then establish the oil pump and the case pallet (see. The repair procedures which are not demanding extraction of the engine from the car - petrol engines or the Repair procedures which are not demanding extraction of the engine from the car - diesel engines).
21. If removed, establish into place a head of cylinders (see. The repair procedures which are not demanding extraction of the engine from the car - petrol engines or the Repair procedures which are not demanding extraction of the engine from the car - diesel engines).