2.10.7. Removal and installation of a gear belt

Fig. 2.489. Components of a drive of a gear belt: 1 – a bolt 120 Нм + to tighten on 90 (1/4 about.); 2 – a bolt 20 Нм; 3 – bypass a roller; 4 – 20 Нм + to tighten on 45 (1/8 about.); 5 – a tension roller; 6 – a gear belt of drive ГРМ; 7 – a bolt 25 Нм; 8 – приводная a camshaft asterisk; 9 – a bolt 25 Нм; 10 – приводная a camshaft asterisk; 11 – a bolt 100 Нм; 12 – a bolt 100 Нм; 13 – a nave of a final cam-shaft; 14 – a nave of an inlet cam-shaft; 15 – a back cover of a gear belt; 16 – a rubber tip; 17 – a bolt 10 Нм; 18 – a sealing ring; 19 – the water pump; 20 – a bolt 13 Нм; 21 – a belt asterisk crankshaftа; 22 – bypass a roller; 23 – a bolt 40 Нм + to tighten on 90 (1/4 about.)

Result a radiator framework in service position.

Remove an engine casing.

Remove полиwedge a belt.

Fig. 2.476. Tension easing semi wedge a belt

Unload a tension element semi wedge a belt (fig. 2.476).

Wring out a cover гасителя крутильных fluctuations.

Fig. 2.481. Untwisting гасителя крутильных fluctuations

Turn off гаситель крутильных fluctuations, keeping the central bolt накидным a wrench (fig. 2.481).

Fig. 2.475. Fastening of the top part of a protective casing

Remove the top part of a protective casing, having released fixing скобы (fig. 2.475).

Fig. 2.490. Fastening of the bottom and average covers of a gear belt

Turn off the bottom and average covers of a gear belt (fig. 2.490).

ATTENTION To scroll the engine it is authorised only for crankshaft in a rotation direction (clockwise).

Fig. 2.491. Installation crankshaftа in position ВМТ

Put crankshaft in position ВМТ (fig. 2.491).

THE NOTE In ВМТ both gear segments are directed upwards.

Fix naves by means of two lock pins.

Fig. 2.492. Fixing of a gear wheel of a gear belt

Fix a gear wheel of a gear belt crankshaftа by means of a stopper crankshaftа for engines with a round gear wheel of a gear belt crankshaftа or by means of a stopper crankshaftа for engines with an oval gear wheel of a gear belt crankshaftа (fig. 2.492).

Marks in an asterisk of a gear belt and stopper should be the friend opposite to the friend. Thus the stopper pin should enter into an aperture of a sealing flange.

THE NOTE The stopper can be pulled over an asterisk only from the face party шлицев.

Mark a direction of rotation of a gear belt with a chalk or a felt-tip pen.

Loosen the on two turns bolts of gear wheels of cam-shafts (fig. 2.491).

Fig. 2.493. Easing of a fixing nut of a tension roller

Loosen the a fixing nut of 1 tension roller (fig. 2.493).

Turn the clown of a tension roller by means of capture for nuts counter-clockwise that it was possible to fix a tension roller a lock pin.

Fig. 2.494. A tightening of a fixing nut of a tension roller

Then turn capture for nuts clockwise against the stop and tighten by hand a fixing nut 1 (fig. 2.494).

At first remove a gear belt from the water pump, and then from other asterisks of a gear belt.

Cam-shafts are stopped by 2 lock pin.

Коленвал it is fixed by a stopper crankshaftа for engines with a round gear wheel of a gear belt crankshaftа or by means of a stopper crankshaftа for engines with an oval gear wheel of a gear belt crankshaftа.

The tension roller is fixed by a lock pin and fixed by a fixing nut to the right against the stop.

THE NOTE Adjustment of a gear belt should be carried out only at the cold engine.

At прокручивании a cam-shaft any of pistons crankshaftа should not is in ВМТ.

Fig. 2.495. A correct arrangement of a tension roller in a back protective casing of a gear belt

Check up a correct arrangement of a tension roller in a back protective casing of a gear belt (fig. 2.495).

Not completely twist bolts.

Gear wheels of cam-shafts should hardly проворачиватся on a nave and should not warp.

Twist gear wheels of cam-shafts in longitudinal grooves on an hour hand against the stop.

Lay a gear belt on a cam-shaft, a tension roller, gear wheels crankshaftов, bypass a roller and in last turn – on a gear wheel of the water pump.

Adjust a tension of a gear belt as follows:

Take a lock pin.

Loosen the a fixing nut of 1 tension roller (fig. 2.493).

Turn the clown of a tension roller by means of capture for nuts clockwise that the index 2 has settled down in the middle before an aperture in the bottom part картера the engine.

THE NOTE Watch that the nut was not turned together with the clown.

Keep a tension roller in this position and tighten a nut of a tension roller the moment 20 Нм +45 (1/8 turns).

THE NOTE At a tightening of a fixing nut the index turns макс. On 5 mm to the right from an aperture in the bottom part картера the engine. This position cannot be changed, as the gear belt settles in due course.

Fig. 2.496. Fixing of a preliminary tension of a gear belt

Put a countersupport, as is shown in drawing 2.496, and pressing in a direction keep a preliminary tension of a gear belt (fig. 2.496).

Tighten bolts of both gear wheels of cam-shafts with the moment 25 Нм.

Remove lock pins and a stopper crankshaftа.

Turn crankshaft on 2 turns in a direction of rotation of the engine that crankshaft has again settled down almost in ВМТ.

ATTENTION To scroll the engine it is authorised only for crankshaft in a rotation direction (clockwise).

Fix a nave And from rotation in a direction of a shaft of the engine by means of a lock pin (fig. 2.497).

Fig. 2.497. Fixing of naves And and In

Check following points.

Whether the nave of Vstopornym is fixed by a pin.

Whether it is fixed crankshaft by a stopper.

Whether the index of a tension roller in the middle or макс is located. In 5 mm to the right of an aperture in the bottom part картера the engine.