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Toothed timing belt
Toothed timing belt (timing) is recommended to be replaced every 60 000 km of run of the car.
| Fig. 3.2. Gazoraspredilitelnogo drive mechanism (RM): 1 - the upper timing cover; 2 - bolts; 3 - the upper protective plate; 4 - belt camshaft drive; 5 - a tension roller; 6 - a nut of fastening of a tension roller; 7 - protective plate; 8 - alternator drive belt and the water pump; 9 - the crankshaft pulley; 10 - the bottom cover of a belt drive of a camshaft; 11 - a gear pulley of a cranked shaft; 12 - bolt crankshaft pulley; 13 - the intermediate shaft sprocket
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Removing the belt 4 (Fig. 3.2) camshaft drive is performed in the following order: - Disconnect the negative terminal of the battery; - Loosen and remove the alternator drive belt 8 and the water pump; - Disconnect and remove the air supply hose between the air filter and the air flow meter and the throttle body; - Raise the front of the car jack and place it on the stand; - Remove the right front wheel; - Remove the bolt and the water pump pulley; - Remove the nut and special bolt of the bottom cover 10 of the camshaft drive belt for water pump; - Remove the bracket and unscrew the nut of the top cover 1 camshaft drive belt, remove the cover 1; - Mark the angular position of the crankshaft pulley 9 relative to the gear 11 of the crankshaft, remove the pulley 9; - Unscrew the bottom cover 10 of the camshaft drive belt, remove the cover and the gasket 10;
| Fig. 3.3. The position adjusting label crankshaft pulley corresponding to TDC of first cylinder
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| Fig. 3.4. The position adjusting labels crankshaft pulley and pulley intermediate shaft corresponding to TDC of first cylinder
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| Fig. 3.5. The position adjusting labels camshaft pulley engines SOHC, corresponding to TDC of first cylinder 1 - cylinder head; 2 - toothed pulley; 3 - head cover; A - adjusting label
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| Fig. 3.6. The position adjusting labels of asterisks of camshafts engine DOHC, corresponding to TDC of first cylinder
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| Fig. 3.7. The position adjusting label of a flywheel corresponding to TDC of first cylinder
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- Set the piston of the first cylinder in the top dead center (TDC), the end of the compression stroke, by turning the crankshaft of the pulley bolt clockwise before combination of labels: on the crankshaft pulley and the bottom cover belt camshaft drive (if unexpunged bottom cover, Fig. 3.3); on the crankshaft pulley and the toothed pulleys of the intermediate shaft (with bottom cover removed, Fig. 3.4); on the camshaft pulley and the cylinder head (engines SOHC, Fig. 3.5); sprockets on the camshafts (engines DOHC, Fig. 3.6); on the flywheel of the crankshaft (Fig. 3.7); - Loosen the nut 6 (see. Fig. 3.2) and loosen the belt tension 4 camshaft drive by turning the tension roller 5 counterclockwise; - Mark marker movement direction of the belt 4 in the event that it is set again; - Remove the 4 belt camshaft drive;
A WARNING After removing the belt is prohibited crank crankshaft and camshafts as this will lead to severe engine damage due to collision with piston valves. |
- Loosen the nut of fastening of a tension roller 6, remove the tension roller 5; - Unscrew the bolt of the camshaft pulley, keeping a pulley from turning; - Remove the camshaft washer, gear and key; - Remove the timing pulley 13, the intermediate shaft by performing the same operations; - Loosen the fastening bolt 12 sprocket 11 of the crankshaft and remove the wheel. To loosen the bolt crankshaft should be blocked from turning. To do this, for vehicles with manual transmission including the fifth gear and brake the car a lay brake on models with automatic transmission, remove the lid viewing window, lock the flywheel and crankshaft with mounting blades for flywheel. The installation of the camshaft drive belt spend to sequences, return to removal. First, the belt is mounted on the crankshaft toothed pulley, then to the intermediate shaft sprocket, camshaft sprocket and idler pulley. After checking the belt tension combination of adjusting labels (see. Fig. 3.4, 3.5, 3.6, 3.7, 3.8).
| Fig. 3.8. The cylinder head engines SOHC: 1 - cylinder head; 2 - cylinder head gasket; 3 - Valve Guides; 4 - slinger; 5 - Laying the cylinder head cover; 6 - cylinder head cover; 7 - power strip; 8 - oil filler plug; 9 - a bolt of fastening of the cylinder head; 10 - stud fastening the cylinder head cover; 11 - a nut of fastening of the cylinder head cover; 12 - Front cover gasket cylinder head; 13 - plug
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Camshaft drive belt is tightened by rotating the tension wheel. Belt tension is checked manually rotating the leading branch of the belt. If the belt can not be turned at an angle of 90 ?�, then loosen the tension if the belt can be rotated by a larger angle - tighten it. Rotate the crankshaft of the engine 2 full revolutions and recheck tension the timing belt.
Table 3.2 Valve timing
Tightening torques Nm
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