Skoda Felicia

Since 1994 of release

Repair and car operation

The scheme of drive ГРМ

The block of cylinders

The block of cylinders is cast from pig-iron. The general view and an order of installation of components of the block of cylinders are presented on an accompanying illustration. Directly in a block body cylinders are pierced. In the bottom part of the block five beds of radical bearings of a cranked shaft are executed. Covers of bearings fasten to the block special bolts М10х65. Washers under heads of bolts are not established.

Axial люфт a cranked shaft it is supervised by the persistent half rings established on the third radical bearing.

Cranked shaft

The cranked shaft is forged from a steel and consists of five radical and four шатунных necks. On a forward pin of a shaft the gear wheel of a drive of the oil pump is fixed and the groove under installation segment шпонки under landing of a cogwheel of a belt of drive ГРМ is provided. At a back end face of a shaft the flange under flywheel installation is equipped.

Shatunno-piston group

Shod rods have двутавровое section and a direct cut of the bottom head. In the top head запрессована the bronze plug which then is pierced till the demanded diameter (17.6 mm). The bottom head is cut in the middle, and then pierced till the diameter 50.6+0.01 (without loose leaves). Correct mutual position of a cover of a rod and loose leaves шатунного the bearing is designated by special labels. Besides, on a head number of the cylinder to which there corresponds the given rod is beaten out also. The cover шатунного the bearing fastens to the bottom head bolts М8х1 of type TORX. In the course of major repairs performance it is accepted to make replacement of bolts of covers шатунных bearings. Components of shatunno-piston assemblage are presented on an illustration.

Pistons are cast from an aluminium alloy and have the concave bottom which cavity partly forms volume of the chamber of combustion. At installation the piston should be developed by a label on the bottom towards an arrangement of drive ГРМ. The piston finger having floating landing is fixed in assemblage by two lock rings. At landing to a rod the piston is warmed up to 60С then in it the piston finger refuels. On each of pistons are established on two компрессионных and on one маслосъемному to a ring.

Head of cylinders and газораспределительный the mechanism

In a head of cylinders valves are placed having рядное an arrangement. The arrangement scheme in a head of components клапанного the mechanism is shown on an illustration.

The head of cylinders fastens to the block ten special bolts М11х1.5 of type TORX. The sealing lining of a head has a metal fringing of apertures under cylinders, and on perimetre is covered by a silicone condensing layer. Correct position of a lining on the block is provided with two adjusting pins planted in the interfaced surface of the block of cylinders.

The order of a tightening of bolts of fastening of a head of cylinders is shown on an illustration.

Inlet and final channels are deduced on the different parties of a head. In a head body запрессованы saddles and directing plugs of valves, and also are generated camshaft support. Covers of bearings of a camshaft fasten in a head bolts М7. In cases of extreme bearings epiploons are planted.

The drive of valves is made directly from a camshaft through the pushers equipped with hydraulic jacks. Hydrojacks provide беззазорный a drive of valves. The scheme of functioning of a hydraulic pusher is presented on an illustration.

The cogwheel of drive ГРМ fastens to a camshaft bolt М14х1.5х47. Drive ГРМ is carried out by a belt drive on the basis of gear belt СR Power 137STD8-19. The effort of a tension of a belt is provided with the tension roller simultaneously increasing a corner of coverage of pulleys. At installation of a gear belt it is necessary to achieve combination of adjusting labels. After belt installation it is necessary to turn a cranked shaft on some turns and again to check up correctness of combination of labels.

The effort of a tension of a belt is regulated automatically by means of hydraulic натяжителя. The scheme of drive ГРМ is presented on an illustration.

The water pump

Not folding centrifugal water pump fastens to the block of cylinders two bolts М8. Connection герметизируется a rubber sealing ring. The pump is put in action gear газораспределительным by a belt. In default pump replacement in gathering is made.

The inlet pipeline and final collector

The inlet pipeline is made of plastic and divided into four channels, incorporating to inlet apertures of a head of cylinders. A joint place герметизируется a sealing ring. In the inlet pipeline the flowmeter and gauges of temperature of soaked up air, and also the air thermostat are placed. Outside the tube of system of catching of fuel evaporations is connected to the pipeline.

The final collector is planted on hairpins and fastens to the block by means of nuts М8. Between a collector and a head it is established the sealing lining reinforced by metal. At installation of a final collector on the engine replacement of a lining and fixing nuts is made without fail.