Skoda Felicia

since 1994 release

Repair and operation of the car



Skoda Felicia
+ Cars of the Skoda Felicia brand
+ Maintenance instruction
+ Routine maintenance
- Repair of the engine
   + Repair without extraction from the car of the petrol engine of 1.3 l
   + Repair without extraction from the car of the petrol engine of 1.6 l
   + Repair without extraction from the car of the diesel engine
   - Dismantle of the power unit and capital repairs of the engine
      Removal from the car of the power unit - preparation and precautionary measures, general information about a suspension bracket of the power unit
      Removal, partition and installation of the power unit
      Capital repairs of the engine - preliminary data
      Dismantling, cleaning, check of a state and assembly of a head of cylinders
      Removal, check of a state and installation of the camshaft and pushers of valves (engine of 1.3 l)
      Removal and installation of an intermediate shaft (diesel engine)
      Removal, check of a state and installation of conrod and piston assemblies
      Removal and check of a condition of a bent shaft
      Cleaning and check of a condition of the block of cylinders/case of the engine
      Check of a state and selection of inserts of radical and conrod bearings of a bent shaft
      Engine assembly order after performance of capital repairs
      Installation of a bent shaft and check of working gaps of radical bearings
      Installation of piston rings
      Installation of conrod and piston assemblies on the engine and check of working gaps of conrod bearings
      Initial start of the engine after completion of its capital repairs
+ Cooling systems, heating
+ Power supply system
+ Engine electric equipment
+ Coupling
+ Transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body and finishing of salon
+ Onboard electric equipment





Check of a state and selection of inserts of radical and conrod bearings of a bent shaft

Typical examples of wear of inserts of bearings of a bent shaft

And — Are scratched by foreign debris - the particles which plunged into a working layer of an insert are visible
In — the Lack of oil - the top layer is erased
With — Inserts are incorrectly located at installation - there are brilliant (polished) sites
D — the Neck is cramped on a cone - is skimmed all surface
Е — Wear of edge of an insert
F — Malfunction of "fatigue" - were formed craters or pockets

CHECK

 PERFORMANCE ORDER

1. Despite obligation of replacement of inserts of radical and conrod bearings in the course of performance of capital repairs of the engine, the condition of old inserts needs to be subjected to the most attentive studying as from results of such analysis it is possible to gather a lot of useful information about the general condition of the engine.
2. An exit of bearings out of operation can result from a lack of lubricant, hit of dirt or foreign particles, overloads of the engine, development of corrosion and other adverse effects. Regardless of the defect nature, the reason of its emergence has to be established and eliminated prior to assembly of the engine in order to avoid a recurrence.
3. For survey take inserts from the beds in the block engine cylinders/case, radical and conrod covers and the lower heads of rods. Spread out the removed inserts on a pure plain working surface as their arrangement on the engine that will allow to correlate their state to a condition of the corresponding necks of a bent shaft.
4. Dirt and foreign particles get to the engine in various ways. They can be left after completion of capital repairs as a result of the negligent relation to cleaning performing procedures inside, get via filters or system of ventilation of a case. Often dirt gets at first to motive oil and already together with it gets into bearings. It is worth to remember that in the course of normal wear of the engine metal sawdust is inevitably formed. If after performance of recovery work not to pay due attention to the procedure of cleaning of the engine, in it by all means there will be abrasive particles. Regardless of a way of penetration into the engine, all foreign particles are introduced in a soft surface of a working layer of inserts of bearings of sliding sooner or later and are easily distinguished at visual survey of the last. The largest particles usually do not get stuck tightly in inserts, but deep furrows and teases leave on their working surfaces and surfaces the corresponding necks of a shaft. The best prevention of emergence of this sort of defects is the conscientious attitude to performance of cleaning of the engine after completion of capital repairs and installation in the course of assembly of only absolutely pure components. Also it is worth to remember need of performance of regular and frequent change of motive oil.
5. Oil starvation can be also caused by several reasons which often are closely interconnected with each other. It is necessary to carry the engine overheat (leading to oil fluidifying), overloads (as a result of which oil is forced out from bearings), the oil leak (connected with the excessive size of a working gap in bearings, wear of the oil pump, or excessive increase in turns of the engine), etc. to those. The violation of passability of maslotok most often connected with negligence of installation of components at the assembly conducting to a rassovmeshcheniye of oil openings also causes reduction of supply of oil in bearings and, finally, to an exit of inserts out of operation. A characteristic sign of oil starvation is the wipe and replacement of a soft working layer of inserts from a steel substrate. Sometimes temperature increases to such an extent that on a substrate violet spots are formed.
6. It is necessary to remember that also the driving manner has significant effect on service life of bearings. Increase in load of the engine is promoted by frequent full opening of a butterfly valve, the movement on small turns, etc. Replacement of an oil film from a working gap of bearings results that conducts to a softening of inserts of the last and education on their working surface of small cracks (fatigue deformation). Finally there is a peeling of separate fragments of material of a working layer and their loss from a substrate.
7. Operation of the car in the conditions of a city cycle is often connected with commission of a set of short trips that leads to development of corrosion of bearings as insufficient warming up of the engine promotes loss in it of condensate and formation of chemically aggressive gaseous mixes. Aggressive products accumulate in motive oil, forming slime and acid and as oil continuously comes to bearings, finally influence material of inserts of the last, causing its oxidation and destruction.
8. The wrong installation of inserts at assembly of the engine also conducts to a bystry exit them out of operation. At too dense installation the size of a working gap is inadmissibly reduced that is the reason of oil starvation of bearings. Hit between backs of inserts and beds of bearings of foreign particles leads to formation of sites of an eminence of a working surface of inserts and destruction of the last in the course of normal operation of the engine.
9. Try not to touch working surfaces of inserts fingers as at the same time the risk of casual damage of soft material of a blanket considerably increases and inevitably there is its pollution.
10. As it was already mentioned above in this Section, replacement of inserts at capital repairs of the engine has to be made without fail regardless of their state - the attempt to ignore this requirement is capable to lead only to the seeming economy.


Selection of inserts

 PERFORMANCE ORDER

1. First of all it is necessary to define dimensional group of radical and conrod necks of a bent shaft, i.e. to find out whether they have the standard size, or were exposed to a pro-point. This task is carried out by measurement of diameter of necks by means of a micrometer and comparison of the received results with the data provided in Specifications at the beginning of the present Chapter. See also Section Removal and installation of a cover of a head of cylinders.

2. Alternatively (only for engines of 1.3 l), the dimensional group of necks of a shaft can be determined by thickness of the inserts of bearings removed from the engine. Measurement is performed by a micrometer, and the dimensional group of necks decides by comparison of results on the data provided in Specifications. It is necessary to notice that measurement of diameters of necks nevertheless gives more reliable information as by the time of emergence of need for capital repairs of the engine inserts usually are not in the best state.

3. Having defined dimensional group of necks of a shaft it is possible to start selection of new inserts of bearings.
4. Inserts of radical and conrod bearings are issued as the standard sizes, and in several repair options (with various extent of belittling) - see Specifications at the beginning of the present Chapter.
5. At installation of a bent shaft with new inserts it is necessary to make check of working gaps in bearings (see the Sections Removal and installation of a head of cylinders assembled with the inlet pipeline and a final collector and the Flywheel - removal, check and installation).