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Timing belt
WARNINGS Rotate the crankshaft clockwise, align the label so that the piston of the first cylinder was established at top dead center on the compression stroke. |
| Fig. 2.15. Location toothed belt on pulleys, labels and positioning pins: 1 - a pulley of the exhaust camshaft; 2 - locating pins; 3 - a pulley of a camshaft of inlet valves; 4 - label; 5 - the oil pump pulley; 6 - the crankshaft pulley
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At this time, the mark on the pulley of a camshaft and the cylinder head cover should be aligned and the dowel pin of the camshaft pulley must be at the top (Fig. 2.15).
Withdrawal
| Fig. 2.16. Toothed timing belt: 1 - toothed timing belt; 2 - the top casing of a gear belt; 3 - Bracket generator; 4 - the water pump; 5 - a bolt, 20 25 Nm; 6 - the water pump pulley; 7 - a bolt, 8- to 10 N ?� m; 8 - C compressor drive belt and the power steering pump; 9 - the crankshaft pulley / vibration damper; 10 - a bolt, 20 Nm 27; 11 - rear upper left casing of a gear belt; 12 - rear left bottom casing of a gear belt; 13 - Bolt, 10-12 Nm; 14 - a pulley of a secondary shaft; 15 - bolt 43-49 Nm; 16 - camshaft pulleys; 17 - bolts 80 to 100 Nm; 18 - a bolt, 30 Nm 42; 19 - tensioner arm; 20 - a pulley tensioner; 21 - a bolt, 43- 65 Nm; 22 - a bolt, 20 Nm 27; 23 - automatic tensioner; 24 - bolt 110-130 Nm; 25 - Special washer; 26 - the crankshaft pulley; 27 - nut, 50-60 Nm; 28 - a pulley of the oil pump; 29 - the guide pulley; 30 - flange; 31 - Bolt, 16-22 Nm; 32 - a gear belt tensioner "B"; 33 - timing belt "B"; 34 - a pulley of a gear belt "B"; 35 - Bolt, 30-45 Nm; 36 - Rubber stopper
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Remove the crankshaft pulley, water pump pulley and the drive belt (Fig. 2.16). Remove the cover of a gear belt. Remove the automatic tensioner toothed timing belt.
A WARNING If the toothed timing belt is to be reused, before removing the chalk, markers or paint mark the direction of rotation. If the installation of the toothed belt is rotated in the other direction, it will lead to its destruction. |
Remove toothed timing belt.
| Fig. 2.17. Reversing pulley bolt camshaft
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Hold against turning a wrench for clamping flat camshaft, unscrew the bolt and remove a pulley of a gear belt from a camshaft (Fig. 2.17).
A WARNING Be careful not to damage the wrench cylinder head and camshaft pulley. |
| Fig. 2.18. Use a screwdriver to lock the balancing shaft: A - before; 1 - cork; 2 - balancing shaft; 3 - the block of cylinders
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Prior to loosen the pulley nut oil pump, first remove the plug from the left side of the cylinder block and the balancer shaft (Fig. 2.18). For this purpose, use a screwdriver with a diameter of 8 mm, inserting it at a depth of more than 60 mm. Remove the pulley nut oil pump pulley and remove the oil pump. Loosen the fastening of a pulley of the right balancing shaft until until you can unscrew it by hand. Remove the belt tensioner gear ?�B?� and toothed belt ?�B?�.
| Fig. 2.19. Removing the toothed belt ?�B?�: 1 - toothed belt ?�B?�; 2 - a pulley ?�B?� of the crankshaft; 3 - toothed belt tensioner ?�B?�
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Remove the pulley ?�B?� from the crankshaft (Fig. 2.19).
A WARNING After removal of the timing belt ?�B?� Do not try to loosen the bolts holding the pulley with pliers or other tool. |
Check Camshaft pulley and tensioner, idler Check the camshaft pulleys, tensioner pulley and idler pulley for wear, cracks or damage. Replace if necessary. Check tensioner pulley and guide pulley to the ease and smoothness of rotation, and the absence of backlash and ambient noise during rotation. Replace them if necessary. Replace pulleys if there is leakage of the lubricant. The automatic tensioner Check the automatic tensioner for leaks and replace as necessary. Check the automatic tensioner rod for wear or damage and replace as necessary.
| Fig. 2.20. Measurement protruding rod automatic tensioner A = 14.5 mm
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Measure the protrusion of the stem. If it does not match the set, replace the auto tensioner (Fig. 2.20). The protrusion of the stem should be 14.5 mm.
| Fig. 2.21. Mounts automatic tensioner in a vise: 1 - a soft metal sheet; 2 - flat washer
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The vise jaws are protected by a soft sheet metal, slowly push the plunger in the tensioner (Fig. 2.21). If the rod is pushed easily, replace the tensioner.
A WARNING Hold the tensioner in a vise so that the ends of the rod and the tensioner are aligned. To avoid damage to the tensioner, use a vice with soft sponges. |
Toothed timing belt Check the toothed belt for traces of oil or dust. If necessary, replace a belt. Small deposits should be wiped with a dry cloth or paper. Do not clean the timing belt solvent. After repair of the engine or adjust the belt carefully check the condition of the belt. If there is any damage in Table. 2.3, replace the timing belt new.
Table 2.3 Damage to the toothed timing belt
Setting
| Fig. 2.22. Installing pulley ?�B?� (1) on the crankshaft (2)
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A WARNING Pay attention to the mounting direction of the flange. If it is not installed correctly, timing belt breaks off. |
| Fig. 2.23. Position the sleeve on the right balancing shaft A - lubrication point; 1 - right balancer shaft; 2 - consolidation; 3 - chamfer; 4 - bush
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Grease with a thin layer of engine oil the outer surface of the hub, and then install it on the right balancing shaft. Ensure that the sleeve is installed in the direction shown in Fig. 2.23. Install the pulley on the right balancing shaft and secure it with a bolt flange. Align the marks on each pulley with the corresponding marks on the front casing. After setting the timing belt "B" check that the part of his tension was not sagging. Set tensioner "B" so that the center of the pulley was placed on the left of the mounting bolt and the flange of the pulley has been directed to the front of the engine.
| Fig. 2.24. Position the timing belt tensioner "B": A - side of the belt; 1 - timing belt "B"; 2 - flange; 3 - the center of the mounting bolts; 4 - tensioner "B"
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Align the mark on the pulley of the right balancing shaft with a label on the front casing (Fig. 2.24). Lift the tensioner ?�B?�, to tension the timing belt ?�B?� with the side of his tension was taut. Under this condition, tighten the bolt to secure tensioner "B". If the bolt is tightened, it prevents joint cranking. If the shaft is turned together, the belt is too tight. Make sure that the timing marks are aligned. Check toothed belt tension. Method 1. After pressing the center of the belt on the side of the tension in the direction of the arrow slack in the belt must be within specification. Deflection of a belt - 5-7 mm. Method 2. Measure toothed belt tension, using a device for measuring the tension. When the length of the branches of the belt 139 mm and 42 kPa pressure is applied, the torque should be in the range of 50-100 Nm.
| Fig. 2.25. The position of the pulley (1) "B" of the flange (3) and a crankshaft pulley (4) on the crankshaft (2)
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Install the flange and the crankshaft pulley on the crankshaft. Be sure to install it in the direction shown in Fig. 2.25.
A WARNING Pay attention to the mounting direction of the flange. If it is not installed correctly, timing belt breaks off. |
Install the special washer and screw the pulley bolt to the crankshaft, and then tighten the pulley bolt torque 110-130 Nm. Through the opening under the cover insert a screwdriver so that the block left balancing shaft in the original position. Install the oil pump pulley and tighten the nut, tightening it to a torque of 50-60 Nm. Install the camshaft pulley and fix a bolt, having tightened its moment of 80-100 Nm. Install the automatic tensioner.
WARNINGS Leave tensioner wire tensioner locking rod. If the stem tensioner is fully released, return it to its original position as follows. 1. Install the tensioner in a horizontal position in a vice with soft sponges. If there is a plug at the bottom of the tensioner hub, under the base of the tensioner Place a flat washer. 2. vise slowly push the plunger in the tensioner so that the hole in the rod is aligned with the hole in the tensioner body (see. Fig. 2.21). Insert tensioner body through aligned holes in steel wire segment. Leave tensioner wire tensioner locking rod. |
Install the tensioner pulley lever mechanism of a tension. Tightening torque tensioner pulley - 43-55 Nm. Turn the camshaft pulley so that the dowel pin of the pulley at the top. Install the mounting index pulley.
WARNINGS If before installing toothed timing belt adjusting label of a pulley of a camshaft does not coincide with the mark on the cylinder head cover, do not rotate the camshaft pulley more than 2 teeth pulley in either direction. Rotation of the pulley by more than 2 teeth can lead to a collision of the piston and the valve. If there is a need in the rotation of the camshaft pulley more than 2 teeth previously turn the crankshaft pulley counterclockwise, dismissing him from adjusting label. After proper installation of the camshaft pulleys, turn the crankshaft to "TDC". |
| Fig. 2.26. Location tags (1), dowel pin (2) and the identification mark (3) when installing the camshaft pulley
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If you are installing the pulleys on camshafts intake and exhaust valves, install them after checking the labels, depending on the engine capacity (Fig. 2.26).
Align the mark on the crankshaft pulley. Align the mark on the oil pump pulley. Tighten the timing belt counter-clockwise around the tensioner pulley and the crankshaft pulley. Left hand put on the timing belt tensioner pulley. Right hand put on the toothed belt pulley on the oil pump. Tighten the timing belt around the right guide pulley. Tighten the timing belt around the pulley inlet camshaft. Rotate pulley exhaust camshaft on one tooth clockwise to align it with the label upper surface of the cylinder head. Pulling the belt with both hands and place it around the pulley exhaust camshaft. Carefully lift the tensioner pulley so that the belt does not sag, and temporarily tighten the central pulley bolt. Recheck the combination of adjusting labels of each pulley (see. Fig. 2.15). Remove the wire locking rod tensioner.
| Fig. 2.27. Measurement protrusion (A) of the stem tensioner
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Rotate the crankshaft two full turns clockwise and leave it on 15 minutes. Then measure protrusion A (Fig. 2.27) tensioning rod (the distance between the tensioner arm and the tensioner body) and make sure it meets the required - 6-9 mm.
| Fig. 2.28. Location and torques bolts toothed belt: A bolts tighten the moment of 8 to 10 Nm; bolts B - 10-12 Nm
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Install the upper and lower casings of a gear belt (Fig. 2.28).
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