Remove the front protective cover of the toothed belt and turn the crankshaft until the timing marks in the camshaft drive are aligned. Loosen the tension roller axle mounting nut and turn it until the toothed belt is loosened to the maximum.
Engage the 4th gear, loosen the alternator drive belt and remove it from the pulleys. Raise the car on a lift. Unscrew the mounting bolt, remove the alternator drive pulley, then the belt from the toothed pulley of the crankshaft and the pulley itself.
Remove the old seal from the oil pump cover, lubricate the new seal with engine oil, and use mandrel 67.7853.9580 to press it into the oil pump cover, acting in the same way as when replacing the camshaft seal, only without using sealant.
Install the toothed pulley on the crankshaft and put the belt on it. Install the generator drive pulley and secure it with a bolt and nut. Put the generator drive belt on the pulleys and adjust its tension (see section. "Engine adjustment").
Lower the vehicle. Lightly tighten the toothed belt with the tension roller, turning the roller axis counterclockwise. Turn the crankshaft clockwise two turns and check the alignment of the timing marks on the camshaft pulley (see figure 7) and flywheel (see figure 67). If the marks do not match, then loosen the belt with a tension roller, remove it from the camshaft pulley, adjust the position of the pulley, put on the belt and, having slightly tightened it with a tension roller, check the coincidence of the installation marks again by turning the crankshaft two revolutions.
If the marks match, then adjust the tension of the toothed belt as described in the chapter "Engine adjustment", and install the front toothed belt cover. Put on and secure the right front wheel. Install all removed components.
Connect the wire to the negative terminal of the battery, check and then adjust the ignition timing.