Citroen Xantia

Since 1993 of release

Repair and car operation

Engine major repairs - the general information

Definition of degree of necessity of performance of major repairs of the engine far not in all cases appears a simple problem and usually demands the account of a wide spectrum of various symptoms and factors.

Considerable run at all unessentially is a sign of that the engine requires major repairs. 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, a major factor defining service life of the engine, frequency and a regularity of performance of procedures of the general and car routine maintenance is. At normal leaving, frequent performance of change of engine oil and the other procedures stipulated by the schedule the engine will reliably serve throughout many and many thousand kilometres of run. On the contrary, the careless relation to routine maintenance performance together with inept driving necessities of carrying out of major repairs of the power unit after very short time can already lead.

It is possible to consider the excessive expense of engine oil as a signal about necessity of check of a condition of piston rings, маслоотражательных caps and-or directing plugs of valves. Naturally, first of all, it is necessary to make sure that oil losses 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 компрессионного 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 up pressure of oil, having connected instead of the gauge-switch of a control lamp a suitable manometre. Compare results of measurement to standard requirements (Specifications see). Excessively low pressure of oil can be a sign of deterioration of radical/shatunnyh bearings of a cranked shaft and-or the oil pump.

Loss of developed capacity, infringement of stability of turns, excessive noise background at work клапанного the mechanism, the raised expense of fuel also are among signs of necessity of carrying out of major repairs of the engine, in particular, when all these factors are shown simultaneously. If performance of a full spectrum of options does not help with elimination of taking place deviations, performance of the recovery work connected with machining of components remains a unique reasonable way out.

Major repairs of the power unit mean restoration of all its working parametres to level, characteristic for the new engine. During major repairs replacement of sleeves of cylinders (is without fail made at a corresponding complete set), pistons and piston rings. Are usually replaced radical and шатунные bearings, can be in case of need made проточка and restoration of necks of a cranked shaft. Service of the valves which condition at the moment of occurrence of necessity for carrying out of major repairs 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 regenerative repair of such auxiliary components, as the ignition distributor (petrol engines), a starter and the generator is usually made also. On termination of repair the engine gets the characteristics peculiar for the new unit, and can serve smoothly still many and many thousand kilometres of run.

Before to start performance of major repairs of the engine attentively familiarise with materials of the given part of the Head engine Repair, thereby theoretically having prepared itself for forthcoming work. We will notice that engine major repairs at all do not demand from the executor 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 term about two weeks, in particular in need of the reference behind the help in a mechanical workshop for the purpose of performance of a separate recovery work. Spend small marketing, having defined presence 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 definition of suitability of some components to the further use demands application of the high-precision measuring equipment. In doubtful situations address for council to experts of car-care centre who always will help to be defined with a choice in a question on necessity 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 the worn out components will appear spent for nothing at the negligent relation to carefulness of maintenance of cleanliness at unit assemblage.