Citroen Xantia

1. Disconnect a negative wire from the battery.
2. Empty cooling system (address to Head Routine maintenance).
3. Achieve combination of openings for blocking of cranked and distributive shaft and pass in them metal cores of the corresponding diameter (see. Fixing cranked/distributive shaft for the purpose of prevention casual in the course of performance of procedures of service of the car). At all do not allow attempts of a provorachivaniye of the engine after introduction of blocking cores.

1. Uncover heads of cylinders (see. Removal and installation of a cover of a head of cylinders).
2. Remove the air sleeve connecting an air purifier to the case of a throttle (see. A power supply system - petrol models).
3. The description of procedure of removal of a head of cylinders assembled with the inlet pipeline and a final collector below is provided that does assembly of more bulky, in view of what it it will be reasonable to remove previously the mentioned components (see. Head of the Power supply system and release).
4. Operating according to the instructions provided in Head of the Power supply system and release, disconnect a reception pipe of system of production of the fulfilled gases from a final collector. At the corresponding complete set disconnect/liberate l-probe electroconducting on purpose not to allow its tension under weight of the given section of system of release.
5. On former being verified with the instructions stated in Head of the Power supply system and release, execute the following procedures:
   a) Dump pressure in a power supply system and disconnect hoses of giving and fuel return. To Zakuporta the open ends of hoses/unions for the purpose of minimization of losses of fuel and in order to avoid hit in dirt system;
   b) Disconnect a gas cable;
   c) Disconnect all other procedures stirring to performance vacuum and ventilating hoses. Liberate hoses from clamps on a final collector;
   d) Disconnect electroconducting from the throttle case;
   e) Disunite two electric sockets on each of injectors of injection and liberate electroconducting from clamps on a collector.
6. Release collars and disconnect hoses of system of cooling from a thermostat casing at the left on a head of cylinders.
7. Release a fixing clamp (ы) and disunite the electric socket (ы) on the sensor (ah) and the sensor switch (ях), screwed in a thermostat casing depending on a complete set.
8. Turn out a bolt of fastening of a directing tube щупа measurements of level of impellent oil at the left on a head of cylinders. Take a tube from the block of cylinders.
9. Disconnect electroconducting from VV of the coil of ignition. If the head deals with the purpose of carrying out major maintenance, remove the coil (see. Ignition system - petrol models). At this VV of a wire should be disconnected from spark plugs, instead of from the coil and are removed assembled from the last. If on wires there is no factory marking, mark them by means of an adhesive tape, having assigned everyone number of the corresponding cylinder. At assembly of VV of a wire should be connected strictly in a former order in order to avoid violation of an order of ignition.
10. Remove an arm of a support of the power unit on the right side of a head of cylinders. Release a natyazhitel and remove a gas-distributing belt from a camshaft cogwheel (see. Removal, check of a condition and installation of a natyazhitel and cogwheels of a gas-distributing belt).

11. Operating as it should be, the return shown on an illustration, in stages (on a half of turn for an approach) weaken ten bolts of fastening of a head of cylinders so that there was a possibility of their reversing manually. Turn out bolts and remove them together with the washers. Try to remember adjusting position of the remote plug by which the left forward bolt is equipped.

12. After a reversing of all fixture it is necessary to separate a head from laying and the block of cylinders/case of the engine, having tried not to displace sleeves of cylinders thus. In spite of the fact that in these engines of a sleeve are planted especially densely, it is necessary to consider nevertheless probability of risk of hit of cooling liquid in the case pallet at inaccurate actions during head dismantle. If to avoid shift of sleeves it is not possible, there can be a violation of tightness of landing of the bottom sealants that will lead to development of leaks already in the near future after unit assembly.

13. For a partition of components prepare two L-shaped cores. Fill cores in boltovy openings of a head and start to shake accurately the last forward on the axial line of the car. Do not try to develop at all a head on the block - it is planted on directing pins, and also for the acting ends of sleeves of cylinders.

14. When the layer of connecting hermetic will appear is destroyed, the head should be lifted up and carefully to remove from the block (it will be reasonable to use the help of the assistant, especially if the head acts in film assembled with the inlet pipeline and a final collector). Remove from the block sealing laying of a head. Also take and combine in a reliable place freely planted directing pins. Do not throw out old laying, - it can be used as a template (see below "Preparation for installation", subitem 4 — 5).
15. Try not to allow provorachivaniye of a cranked shaft at the removed head as it can lead to pushing out of sleeves from nests of cylinders. All operations demanding such provorachivaniye should be made only after reliable fixing of sleeves in the block. In the absence of near at hand special firm clips of a sleeve can be fixed by means of pair of bolts of suitable length and two flat washers of big diameter.
16. If the head is subject to further dismantling for the purpose of performance of procedures of major maintenance, take from it a camshaft (see. Removal, check of a condition and installation of a camshaft and pushers of valves), then address to materials of the section Removal and major maintenance of the engine.

1. Execute the procedures described in subsection of "l Model 1.6 and 1.8", subitem 1 — 10. Pay attention that in this case the directing tube measuring щупа is established on a wall of the inlet pipeline.

2. Operating as it should be, the return shown on an illustration, in stages (on a half of turn for an approach) weaken ten bolts of fastening of a head of cylinders so that there was a possibility of their reversing manually.

3. Turn out bolts and remove them together with the washers. The fixture (both bolts and washers) is not subject to a reuse and should be replaced.
4. After extraction of fixture remove a head from the block of cylinders (use the help of the assistant).
5. Remove from an interfaced surface of the block sealing laying, - pay attention to two directing pins. If pins are planted in the block freely, take them and clean in a reliable place.
6. If the head is subject to further dismantling for the purpose of performance of procedures of major maintenance, take from it a camshaft (see. Removal, check of a condition and installation of a camshaft and pushers of valves), then address to materials of the section Removal and major maintenance of the engine.

1. Interfaced surfaces of a head and the block of cylinders should be absolutely pure. By means of a plastic or wooden scraper remove from them all traces of a material of old laying and coal deposits. Smooth out also the bottoms of pistons. On l models 1.6 and 1.8 before turning a cranked shaft, take care of reliable fixing of sleeves of cylinders (see subsection of "l Model 1.6 and 1.8", item 15). Remember that the soft aluminum alloy at careless handling can be easily damaged. On all models accept precautionary measures against hit of a coal dust in маслотоки and water galleries of the engine. Stick all open openings (including boltovy) with an adhesive tape. In order to avoid hit of coal particles in free space between pistons and mirrors of cylinders fill gaps dense greasing which before assembly of the unit should be removed by means of a soft brush (then components should be wiped pure rags).
2. Check interfaced surfaces of a head and the block of cylinders on existence of deep scratches, задиров and other mechanical damages. Insignificant defects can be removed by means of a file with small tooth. In more serious cases replacement of the damaged component becomes the unique alternative. Estimate not planeness degree interfaced surfaces of a head of cylinders by means of the steel ruler put on an edge and щупа lezviyny type (see. Removal and major maintenance of the engine).
3. On models 1.6 and 1.8 of l check size of a vystupaniye of sleeves of cylinders (see. Cleaning and check of a condition of the block of cylinders/case of the engine).
4. Track, that new laying of a head of cylinders on the thickness corresponded to standard requirements (see. Specifications). On some models laying of only one thickness that excludes probability of a mistake are issued. On others two types of laying can be used: standard thickness (are established at manufacturer) and slightly thicker (+ 0.2 mm) "repair" heads applied after a pro-point. After a pro-point on an interfaced surface of a head, near the third final port the label in the form of R letter is put. The similar label should be present and on subject installation in this case to repair laying (near an opening of the third cylinder). Identification of laying can be made also on openings from its left edge (see further).
5. At the correct laying of laying on the block of cylinders in a uvula located from its left edge should appear one or several openings are punched. At standard laying (1.2 mm) there is only one opening; whereas in repair (1.4 mm) them will be two or three (depending on letting-out firm manufacturer). Track, that new laying established on the block had the correct thickness. In case of absence of confidence do not hesitate to address for the help to experts Citroёn company service centers.
6. Check a condition of bolts of fastening of a head of cylinders, special attention having given them to a carving part. Estimate degree of wear of bolts, make replacement of defective fixture. Wash out bolts in solvent, then carefully dry them. Measure length of each of bolts: measurement is made from the bottom surface of a head (the washer is removed) to an end face of a carving part. If the length of all bolts makes less than 176.5 mm (l model 1.6 and 1.8)/122 mm (model of 2.0 l), they can be used at unit assembly. If the length at least one of bolts exceeds the admissible value, all bolts should be replaced in a set. In view of enough high loadings to which these bolts are exposed in use the car, originators of the real Management recommend to make their replacement each time at assembly, regardless of a condition.

1. Carefully wipe interfaced surfaces of a head and the block of cylinders. Make sure available on the regular places from both parties of an interfaced surface of the block of two directing pins. On models 1.6 and 1.8 of l remove clamps of fastening of sleeves of cylinders (see subsection of "l Model 1.6 and 1.8", item 15).
2. Lay on an interfaced surface of the block new laying, having tracked, that identification openings appeared from its left edge.

1. Make sure that cranked and distributive shaft are blocked by cores of the corresponding diameter (see. Fixing cranked/distributive shaft for the purpose of prevention casual in the course of performance of procedures of service of the car). By means of the assistant accurately lay a head on the block of cylinders, correctly having put on it directing pins.
2. Grease with high-quality refractory greasing of the Molykote G Rapid Plus type a carving part and the bottom surfaces of heads of fixing bolts.
3. Accurately get fixing bolts in the openings (do not forget about washers) and by hand tighten them. Remember that under the left forward bolt also remote plug is established.
4. In stages in an order shown on an accompanying illustration, tighten bolts with effort of the first stage (see. Specifications).

5. Operating as it should be, the return shown on an illustration, completely release all bolts, then again tighten them (again in the order shown on an illustration) with effort of the second stage (see. Specifications).

6. After all bolts will be tightened with effort of the second stage, hold on them finally on a corner of thirds of a stage of a tightening (see. Specifications). In the absence of near at hand goniometer use the template made of a cardboard, or put a measuring scale directly on a head surface around each of bolts.
7. Having finished procedure of a tightening of bolts, connect the electric socket to VV to the ignition coil. If the head dealt with the purpose of carrying out major maintenance, establish the coil according to the instructions provided in the section System of ignition - petrol models.
8. Throw with a gas-distributing belt a camshaft cogwheel. Fix a basic arm on an end face of a head of cylinders and strongly tighten fixing bolts. Establish an arm of the right support of the power unit, tighten fixing nuts with demanded effort. Clean a jack from under the engine.
9. Make a tension of a gas-distributing belt (see. A belt of a drive of GRM - the general information, removal and installation).
10. Further assembly is made as it should be, the return to a dismantle order taking into account the next moments:
   a) Track correctness of laying of electroconducting and reliability of fixing of its sockets;
   b) Track correctness of connection and reliability of fastening by collars of hoses of system of cooling;
   c) Track correctness of connection of all vacuum and ventilating hoses;
   d) Establish into place a cover of a head of cylinders (see. Removal and installation of a cover of a head of cylinders);
   e) Connect to a final collector a reception pipe of system of production of the fulfilled gases, establish into place an air purifier casing with air sleeves, make adjustment of a cable of gas (see. A power supply system - petrol models). If removed, establish to the place of the inlet pipeline and a final collector (see in the same place);
   f) In summary, fill cooling system (see. Weekly checks) also connect a negative wire to the battery.

1. According to the instructions provided in subsection of "l Model 1.6 and 1.8", subitem 1 — 3, ignoring only the instruction on an arrangement of identification openings of laying, establish into place a head of cylinders.

2. In stages in an order shown on an illustration, tighten bolts with effort of the first stage (see. Specifications), then repeat procedure, having tightened them with effort of the second stage.

3. After all bolts will be tightened with effort of the second stage, hold on them finally on a corner of thirds of a stage of a tightening (see. Specifications). In the absence of near at hand goniometer use the template made of a cardboard, or put a measuring scale directly on a head surface around each of bolts.
4. Having finished procedure of a tightening of bolts, connect the electric socket to VV to the ignition coil. If the head dealt with the purpose of carrying out major maintenance, establish the coil according to the instructions provided in the section System of ignition - petrol models.
5. Throw with a gas-distributing belt a camshaft cogwheel (see. Removal, check of a condition and installation of a natyazhitel and cogwheels of a gas-distributing belt). Make a tension of a gas-distributing belt (see. A belt of a drive of GRM - the general information, removal and installation).
6. Further assembly is made as it should be, the return to a dismantle order taking into account the moments listed in subsection of "l Model 1.6 and 1.8", item 10.