Citroen Xantia

1. Check is made by means of special компрессометра, intended for compression measurement on diesel engines and calculated on a high pressure. The measuring instrument is connected to the carving nozzle, rolled an aperture under candle installation накаливания or atomizers. On considered models the nozzle under форсуночные apertures in view of limitation of access to candle is required. Hardly it is necessary to get компрессометр in constant using for carrying out of incidental checks, - it will be more reasonable to hire it, or to spend measurements on a car repair shop.

2. Follow instructions of manufacturers of the device. In the absence of instructions it is necessary to take care of performance of following general requirements:
   a) the Battery should be in good repair and is completely charged, the engine - is heated-up to normal working temperature;
   b) All atomizers (or candles накаливания) should be turned out. At removal of atomizers do not forget to take also a washer пламегасителей that the last have not appeared are beaten out developed in chambers of combustion by pressure;
   c) Electromagnetic запорный the valve of switching-off of giving of fuel should be disconnected in order to avoid fuel receipt in cylinders and casual start of the engine.
3. During check there is no necessity to keep a pedal of gas squeezed out as air soaked up in the engine is not banished through the throttle chamber.
4. The so much absolute size of the removed indications, how many uniformity of distribution of pressure between cylinders (Specifications see) is important not.
5. The decrease reason компрессионного pressure upon diesel engines is usually established slightly more difficult, than on the petrol. Thus carrying out of "damp" check by a way заливания in cylinders of a small amount of oil does not give desirable result in view of a high probability of leaving of oil in the vortical chamber or in deepening in the bottom of the piston instead of filling of landing backlashes of piston rings.
6. Pressure in all cylinders should be almost identical. In the indications, exceeding the value stipulated in Specifications, it is necessary to consider a difference as an infringement sign. Remember that pressure in the serviceable engine should rise quickly enough. The low indication on the first step with its gradual increase at the subsequent, speaks about deterioration of piston rings. If pressure does not rise at all, it is necessary to check up tightness of closing of valves and a condition of a lining of a head of cylinders (the probability of formation of cracks in a head body is not excluded also). The congestion of adjournment on the bottom surfaces of plates of valves also can cause loss компрессионного pressure.
7. Excessively high indications testify also development нагарообразования on internal surfaces of a head of cylinders, valves and pistons. A head it is necessary to remove and make it декарбонизацию (Removal and engine major repairs see).