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To introduce the serpentine drive system with the alternator drive belt auto-tensioner, the following operations will be required.
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1.
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To reuse the alternator and others belt, draw an arrow indicating the rotating direction on the back of the alternator and others belt using chalk to install the same direction.
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Rotate the pulley bolt of the alternator drive belt auto-tensioner anti-clockwise with an offset wrench [recommendation: 45 degrees, a long offset wrench (5/8 x 11/16 inches)], and insert the hexagon wrench into the alternator drive belt auto-tensioner hole to fix the alternator drive belt auto-tensioner.
2.Remove the alternator and others belt.
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1.Use the following special tools to support the crankshaft pulley:
- Front hub and flange yoke holder (MB990767)
- Pin (MD998719)
2.Loosen the crankshaft pulley centre bolt and remove the crankshaft pulley washer and crankshaft pulley.
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1.Wipe off the dirt on the crankshaft sprocket, crankshaft and crankshaft pulley as shown in the figure using a rag, and then degrease the areas.
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Degrease them to prevent drop in the friction coefficient of the pressed area which is caused by oil adhesion.
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2.Install the crankshaft pulley.
3.Wipe off the dirt on the crankshaft pulley washer and the crankshaft pulley centre bolt as shown in the figure using a rag.
4.Apply an adequate and minimum amount of engine oil to the thread of the crankshaft pulley centre bolt and the lower area of the flange.
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5.Use the following special tools as during removal to support the crankshaft pulley:
- Front hub and flange yoke holder (MB990767)
- Pin (MD998719)
6.Tighten the crankshaft pulley centre bolt to the specified torque.
Tightening torque: 210 N·m
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