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Removal, check and installation of the timing belt
Withdrawal Loosen the bolts coolant pump pulley. Loosen the bolt of the generator.
| Fig. 2.159. Pulley water pump and alternator drive belt
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Remove the water pump pulley and alternator drive belt (Fig. 2.159). Remove the crankshaft pulley.
Remove the tensioner pulley timing belt. Remove the timing belt.
| Fig. 2.162. Labels indicating the direction of rotation
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NOTE In the case of re-use of the timing belt should be applied in chalk on the back (non-working) surface of the belt an arrow indicating the direction of rotation (or the location of the crankshaft pulley) that during the installation of the belt not to confuse the direction of rotation (Fig. 2.162). |
Unscrew the crankshaft sprocket. Remove the sprocket and the guide washer from the crankshaft. Remove the belt tensioner timing.
Check sprockets, roller timing belt tensioner and idler roller Check the camshaft sprocket, crankshaft sprocket, tensioner pulley Timing belt guide roller and the absence of excessive wear, cracks or damage. Replace them if necessary.
| Fig. 2.163. Check smooth rotation of the roller tensioner timing belt
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Check the ease and smoothness of rotation of the roller tensioner timing belt and the guide roller and make sure no excessive backlash and unusual noises during the rotation (Fig. 2.163). Replace the roller if necessary. Replace the roller if traces of grease leaking from his bearing. Check the belt for dirt or oil deposits. Replace the belt if necessary. Small pollution belt can be removed with a dry cloth or paper wiper. Do not use solvents for this purpose.
At engine major repairs or adjusting the belt tension, carefully inspect the belt. If you find any of the following defects, replace with a new belt (Fig. 2.164).
NOTE Normal belt should have clearly pointed sides like cut with a knife surfaces. |
Setting
| Fig. 2.165. Installation of the guide washers and crankshaft sprocket
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Refit the washer and the crankshaft sprocket as shown in the figure (Fig. 2.165). Note the orientation of parts during installation. Tightening torque bolts crankshaft sprocket: 170-180 Nm.
Install the camshaft sprocket and tighten its mounting bolt to the specified torque (Fig. 2.166). Tightening torque bolts camshaft sprocket: 100-120 Nm. Install the guide pulley and tighten its mounting bolt to the specified torque. Tightening torque bolts guide roller: 43-55 Nm. Align the labels of asterisks of cranked and distributive shaft to the adjusting labels of the cylinder when the piston ?��1 is at TDC compression stroke.
| Fig. 2.167. The experimental setup timing belt and the crankshaft sprocket
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Put the timing belt to the camshaft sprocket. After that, make sure that the working belt is tight. Then apply a force in the opposite direction of rotation (counterclockwise) to the camshaft sprocket to tension the belt is working, and make sure that all timing marks are aligned (Fig. 2.168). Tighten the first adjusting bolt tensioner, then bolt hinge tensioner. Tightening torque tensioner bolts: 43-55 Nm. Turn the crankshaft one turn in the normal direction of rotation (clockwise) and re-align the label with the crankshaft timing mark (the cylinder ?��1 at TDC compression stroke).
Double-check the tension of the timing belt. When lightly pressed (with a force of about 20 N) in a horizontal direction on the belt in the middle of its operating branches make sure that the top of the tooth belt deflected by approximately 4-6 mm (Fig. 2.169). Make sure that the top of tooth timing belt is deflected by about 1/4 the width of the head of the adjusting bolt tensioner (with respect to the edge of the bolt head). Install the timing belt cover. Tightening torque cover mounting timing belt: 8-10 Nm. Install the crankshaft pulley. Make sure the guide pin crankshaft sprocket walked into the small hole of the pulley shaft. Tightening torque crankshaft pulley: 140-150 Nm. Install the water pump pulley.
Install the alternator drive belt and adjust its tension (Fig. 2.170).
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