2.3.4. Check and gap adjustment in a drive of valves

NOTE Check and adjustment of gaps in a drive of valves is made on the cold engine (at temperature of cooling liquid: 20 °C and the head of cylinders established on the engine.

Fig. 2.100. Drive of valves of camshafts

Remove a shumozashchitny casing of the engine.

Uncover a maslozalivny mouth.

Unscrew bolts of fastening of the central cover and then uncover.

Fig. 2.101. Top cover of a belt of a drive of GRM

Remove the top cover of a belt of a drive of GRM (fig. 2.101).

Unscrew bolts of fastening of the top cover of a belt of a drive of GRM and then uncover.

Uncover heads of cylinders.

Disconnect candle wires of a high voltage, holding them for caps and without applying considerable efforts at their detachment.

NOTE The pulling or bending of a wire of a high voltage can lead to conductor damage in a wire.

Disconnect a hose of compulsory ventilation of a case and a ventilating hose of the valve of compulsory ventilation of a case from a cover of a head of cylinders.

Disconnect a cable of a pedal of an accelerator from a cover of a head of cylinders.

Unscrew bolts of fastening of a cover of a head of cylinders and then uncover also laying.

Fig. 2.102. Installation of the piston of the cylinder No. 1 in VMT of a step of compression

Establish the cylinder No. 1 piston in VMT of a step of compression (fig. 2.102).

Turn a pulley of a cranked shaft and combine a groove on it with adjusting well-aimed "T" on the indicator of a corner of an advancing of injection (a scale on the bottom cover of a belt of a drive of GRM).

Fig. 2.103. Combination of an asterisk of a camshaft with an adjusting label on a cover of the forward bearing

Check that the opening in an asterisk (for a belt) a camshaft is combined with an adjusting label on a cover of the forward bearing of a camshaft. If combination is not present, turn a cranked shaft on one turn (360 °) (fig. 2.103).

Check gaps in a drive of valves.

Check only the valves noted in drawing (when the cylinder No. 1 piston in compression VMT). Measure a gap in a drive of valves.

By means of flat щупа measure a gap between an adjusting washer of a pusher of the valve and a surface of a back (non-working) part of a cam.

Write down results of measurements of a gap in places where the measured size does not correspond to admissible values. These data be required further for selection of a replaced adjusting washer.

Values of a gap in a drive of valves (at temperature of cooling liquid of the engine: 20 °C) are specified below.

Nominal rate:

inlet valves – 0,20 mm;

final valves – 0,28 mm.

Maximum permissible value:

inlet valves – 0,12–0,28 mm;

final valves – 0,20–0,36 mm.

Turn a pulley of a cranked shaft on one turn (360 °) and combine a groove on it with adjusting well-aimed "T" on the indicator of a corner of an advancing of injection (a scale on the bottom cover of a belt of a drive of GRM).

Fig. 2.104. Check of gaps in a drive of valves, when the cylinder No. 1 piston in VMT of a step of compression

Check only the valves noted in drawing 2.104 when the cylinder No. 4 piston in compression VMT. Measure a gap in a drive клапанов.2

Fig. 2.105. Check of gaps in a drive of valves, when the cylinder No. 4 piston in VMT of a step of compression

Adjustment of gaps in a drive of inlet and final valves.

Fig. 2.106. Installation of a cam of a camshaft

Turn a cranked shaft so that for the valve in which drive the gap is regulated, the acting part of a cam of a camshaft was directed up