Citroen Xantia

since 1993 of release

Repair and car operation

Major maintenance of the engine - the general information

Definition of degree of need of performance of major maintenance of the engine far not in all cases appears a simple task and usually demands the accounting of a wide range of various symptoms and factors.

Considerable run at all unessentially is a sign of that the engine needs major maintenance. On the other hand, also it is impossible to consider insignificant term of operation of the car as a sufficient guarantee of serviceability of a condition of the power unit. Perhaps, the major factor defining service life of the engine, frequency and a regularity of performance of procedures of the general and routine maintenance of the car is. At normal leaving, frequent performance of change of engine oil and the other procedures stipulated by the schedule the engine reliably will serve throughout many and many thousand kilometers of run. On the contrary, the careless relation to performance of routine maintenance together with inept driving can already result in need of carrying out major maintenance of the power unit later very short time.

It is possible to consider an excessive consumption of engine oil as a signal about need of check of a condition of piston rings, maslootrazhatelny caps and/or directing plugs of valves. Naturally, first of all, it is necessary to make sure that losses of oil are not connected with development of its external leaks. Address for the help to the qualified experts who will help to define the general condition of the engine of your car on the basis of analyses of results of check of kompressionny pressure in 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).

Check pressure of oil, having connected instead of the sensor switch of a control lamp a suitable manometer. Compare results of measurement to standard requirements (see. Specifications). Excessively low pressure of oil can be a sign of wear radical / шатунных bearings of a cranked shaft and/or the oil pump.

Loss of the developed capacity, violation of stability of turns, excessive noise background at operation of the klapanny mechanism, the increased fuel consumption also are among signs of need of carrying out major maintenance of the engine, in particular, when all these factors are shown at the same time. If performance of a full range of settings does not help with elimination of the taking place deviations, performance of the recovery operations connected with machining of components remains the unique reasonable way out.

Major maintenance of the power unit means recovery of all of its working parameters to level, characteristic for the new engine. During major maintenance replacement of sleeves of cylinders (is without fail made at the corresponding complete set), pistons and piston rings. Radical and shatunny bearings are usually replaced, the pro-point and restoration of necks of a cranked shaft can be in case of need made. Service of the valves which condition at the moment of emergence of need for carrying out major maintenance of the engine almost for certain leaves much to be desired is without fail carried out. In parallel with performance of procedures of the general repair of the power unit also regenerative repair of such auxiliary components, as the ignition distributor (petrol engines), a starter and the generator is usually made. On termination of repair the engine gets the characteristics peculiar for the new unit, and can serve smoothly still many and many thousands kilometers of run.

Before starting performance of major maintenance of the engine attentively familiarize with materials of this part of Head engine Repair, thereby having theoretically prepared itself for the forthcoming work. Let's notice that major maintenance of the engine at all does not demand from the performer of high professional level (under condition of strict observance of all instructions), however can take away a lot of time. It is necessary to prepare for refusal of using the car for the term of about two weeks, in particular in need of the request for the help in a mechanical workshop for the purpose of performance of separate recovery operations. Carry out small marketing, having defined existence on sale of necessary spare parts, tools and the equipment. Beforehand prepare all necessary materials. The most part of works can be executed with application of a usual set of the metalwork tool, however the part of checks by determination of suitability of some components to further use demands use of the high-precision measuring equipment. In doubtful situations address for council to specialists of car-care center who always will help to decide on a choice in a question of need of replacement or regenerative repair of any of internal components of the engine.

In summary we will notice that all efforts on performance of regenerative repair of worn-out components will appear spent for nothing at the negligent relation to care of maintenance of purity at unit assembly.