Daewoo Nexia

Since 1994 of release

Repair and car operation

2.21. Repair of a head of the block of cylinders

THE GENERAL DATA

Clearing of directing plugs of valves


Check of planeness of a surface прилегания heads of the block of cylinders


Measurement of height of a head of the block of cylinders

And = 96 0,25 mm

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The prevention

Before демонтажем heads of the block of cylinders and the mechanism газораспределения to measure a compression in cylinders and to write down results. At mechanism dismantling газорас пределения it is necessary to keep the complete set цию details in separate groups and at assemblage to establish them strictly on the same places with which they occupied before dismantling. Otherwise it will be broken extra earnings of details.

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To disassemble

PERFORMANCE ORDER

1. The mechanism газораспределения. 2. To unscrew spark plugs.

To check up

PERFORMANCE ORDER

Lining of a head of the block of cylinders and condensed surfaces on presence of traces of leak of a cooling liquid and oil, break of gases and corrosion. If the lining has defects, it is necessary to define the reason: – Wrong installation; – Easing of fastening or deformation of a head of the block of cylinders; – Absence of pins.

To clear

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The prevention

At use of the mechanised metal brush it is necessary to put on goggles in avoidance травмирования an eye.

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PERFORMANCE ORDER

1. A head of the block of cylinders. To remove all adjournment to metal. It is forbidden to apply the mechanised cleaning by a metal brush of a plane прилегания heads to the block of cylinders. 2. Directing plugs of valves, see fig. Clearing of directing plugs of valves. 3. Carving apertures. 4. The hermetic rests in candle apertures.

To check up

PERFORMANCE ORDER

1. Serviceability of a carving and heads, absence of cracks on cores of bolts of fastening of a head of the block of cylinders. The prevention At head installation to apply only new fixing bolts. 2. A head of the block of cylinders on presence of cracks, especially between saddles of valves and in final channels. 3. The top surface of a head on presence of traces of corrosion, foreign impurities in a material and fistulas. 4. Deviations from planeness of the top surface of a head, and also привалочных planes for inlet and final pipelines, see fig. Check of planeness of a surface прилегания heads of the block of cylinders. In the presence of deformations to replace a head of the block of cylinders. 5. To measure head height. If the height makes 95,75 mm or less, to replace a head, fig. Measurement of height of a head of the block of cylinders see. 6. Serviceability of all carving apertures. The defective carving aperture can be repaired by means of the plug-in plug (ввертыша). 7. Landing surfaces:       – заглушки cooling shirts. 8. Directing plugs of valves. Before to start repair of saddles of valves, it is necessary to check up at first a condition and to repair directing plugs of valves as they align cores of valves in a head concerning saddles. Before measurement of diameter and carrying out of any repair work it is necessary to clear directing plugs carefully. At deterioration to process apertures of plugs development for the repair size. 9. Saddles of valves on presence of strong deterioration and bowls. Saddles of valves can be repaired grinding. For restoration of working capacity of saddles of valves it is necessary to use the special grinding machine. At work to follow instructions of the manufacturer of the grinding machine. If saddles have undergone to repair by grinding, it is necessary to process also facets of heads of valves or to replace valves.

To establish or attach

PERFORMANCE ORDER

1. Spark plugs. 2. Valves and клапанные springs. The prevention In order to avoid damages to screw candles after installation of a head of the block of cylinders.