Citroen Xantia

1. Disconnect a negative wire from the battery.
2. Empty cooling system (address to Head Routine maintenance).
3. Remove the inlet pipeline and a final collector (see. A power supply system - diesel models). Alternatively (in particular on models with a turbo-supercharging), remove only the inlet pipeline (see in the same place), then give a nut of fastening of a final collector, remove remote plugs, then, by means of an ex-tractor (or two zakontrenny nuts), take fixing hairpins from a head of cylinders now the final collector can be left on a place together with a turbokompressor.
4. Take care of reliable fixing of a final collector with a turbokompressor, try not to allow tensions of a maslopodayushchy tube of the last.

5. Disconnect from nozzles and remove hoses of branch of leaks.

6. Disconnect fuel tubes from nozzles and TNVD and remove them, operating according to the instructions provided in the section of System of decrease in toxicity and production of fulfilled gases.
7. Give a fixing nut and disconnect a food wire from the corresponding candle of heat. Remove washers.

8. Disconnect a hose of an okhladitelny path from the left back part of a head of cylinders.

9. Disconnect a small hose of an okhladitelny path from forward (from a gas-distributing belt) a head end face.

10. Liberate a hose of return of fuel from a bearing arm on a head of cylinders. Shift a hose aside.

11. Disconnect a gas cable from TNVD (see. A power supply system - diesel models) also shift it aside, having taken away from a head.
12. Remove a casing of the fuel filter/thermostat (see. Head of System of cooling, heating and ventilation).
13. Give a nut / turn out a hairpin of fastening of a bearing arm of a hose of an okhladitelny path and an elevating eye of the power unit to a head of cylinders from transmission.
14. Remove a camshaft cogwheel (see. Removal and installation of cogwheels of a belt of a drive of GRM).
15. Remove a natyazhitel of a gas-distributing belt and an arm of the right support of the engine (see. Removal and installation of components of the right support of the power unit and natyazhitel of a gas-distributing belt).
16. Remove an intermediate roller of a gas-distributing belt (see. Removal and installation of an intermediate roller of a gas-distributing belt).
17. Turn out a bolt of fastening of a forward plate of the engine to a basic arm of TNVD.
18. Give a nut and a bolt of fastening of a forward plate and bearing arm of the generator to TNVD arm. Remove a forward plate.

19. In stages give bolts of fastening of a head of cylinders, operating as it should be, the return specified illustrations (weakening of bolts will need a TORX type key in the T55 size).

20. Take bolts and remove them together with remote plugs.

21. Having shaken, lift a head, removing it from the block of cylinders and a directing pin. For rocking of a head use firm adaptations of production of the Citroёn company, or simply two bent under 90 ° metal hooks. Do not try at all подрычажить a head under an interfaced surface in order to avoid violation of density of its prileganiye.

22. Remove a head, then its sealing laying.

1. Make sure that the gas-distributing belt is removed from TNVD cogwheel, then turn a cranked shaft, having brought pistons of the 1st and 4th cylinders into provisions VMT. Fix on the block of cylinders a tsiferblatny measuring instrument of plunzherny type and null it on interfaced surfaces of the block. Transfer a plunzher to the middle of the bottom of the piston of the first cylinder and slowly повращайте a cranked shaft forward-back in an insignificant range. Consider maximum of the indications fixed by the device. Write down result of measurements.

2. Operating in the order described above, measure vystupaniye size over an interfaced surface of the block of the 4th cylinder, then turn a cranked shaft for a half of turn (180 °) and measure size of a vystupaniye of pistons of the 2nd and 3rd cylinders.
3. In the absence of near at hand tsiferblatny measuring instrument, use a planeness measuring instrument (the steel ruler put on an edge) and shchupy lezviyny type, or Columbus with a noniusny scale (remember that such method is much less reliable).

4. Define maximum of the removed measurements and use it for determination of thickness required for installation with a head of cylinders of new laying (see the table provided below). It is possible to determine type and engine displacement by number of cuts or the openings punched on edge to a head on its axial line for installation on which this laying approaches.

1. Manufacturers of cars recommend for check of the validity of fixing bolts for further use to make measurement of their length. Nevertheless, according to originators of the real Management, it will be more reasonable to replace all bolts regardless of their condition. Pay attention that if the bolt is cut off for laying fixing, (see further "Installation",), at final installation of a head it it is necessary to replace item 2.

2. Measure length of bolts from the basis of their head to the bottom cut. By means of given below the table define the validity of each of bolts to further use.

1. Turn a cranked shaft clockwise (looking from a gas-distributing belt) so that pistons of the 1st and 4th cylinders passed the provision of the NMT and started to rise. Stop a shaft, a code pistons will appear on a half of the course up. Pistons of the 2nd and 3rd cylinders, respectively, will stop on a half of the course down.
2. Having arranged the correct image (identification labels towards turned to a gas-distributing belt to the engine end), lay picked up for type and thickness new sealing laying on an interfaced surface of the block of cylinders. Track, that the directing pin was on the place from the party of an interfaced surface of the block turned to a gas-distributing belt. As one directing pin is provided only, laying can be displaced in the course of head installation that is especially probable when works are made on not taken of the car and the engine located obliquely. In the worst option possibility of damage of valves or laying is not excluded at blow of the first about the last. In order to avoid such troubles, cut a head of one of fixing bolts and saw through in an end face of the last of shlitsa for the purpose of ensuring its rotation by means of a screw-driver. Screw a bolt in one of carving openings in the block from a flywheel and use it as the second directing pin.
3. Lower a head on the block of cylinders.
4. Grease a carving part and the bottom surfaces of heads of fixing bolts with Molykote G Rapid Plus greasing, or any other of category of the refractory.
5. Accurately fill all fixing bolts in the openings in a head (do not forget about remote plugs) and by hand tighten them. After a vvorachivaniye of three-four bolts, turn out the cut-off directing bolt (see item 2) and replace it new.

1. In stages, in an order specified an illustrations, tighten bolts of fastening of a head of cylinders with effort of the first stage.

2. Operating in a former order, tighten bolts with effort of the second stage, hold on on a corner of thirds (use a goniometer or put the corresponding scale directly on a head surface).
3. Further installation is made as it should be, the return to a dismantle order. Pay attention to the next moments:
   a) Track correctness of laying and reliability of fixing of all wires and hoses of okhladitelny and vacuum paths;
   b) Installation of a cover of a head of cylinders make according to the instructions provided in the section Removal and installation of a cover of a head of cylinders;
   c) Do not forget to connect the inlet pipeline and a final collector (see. A power supply system - diesel models);
   d) Surely fill cooling system (address to Head Routine maintenance);
   e) Connect the battery and remove air from a power supply system (see. A power supply system - diesel models).

1. In stages, in an order specified an illustrations, tighten bolts of fastening of a head of cylinders with effort of the first stage.

2. Operating in a former order, tighten bolts with effort of the second stage, then hold on on a corner of thirds (use a goniometer or put the corresponding scale directly on a head surface).
3. Further installation is made as it should be, the return to a dismantle order (see subsection "Models without a turbo-supercharging", item 3).