To replace the oil seal, install the car on a two-post lift, brake it with a parking brake and perform all the preparatory operations as for removing the camshaft oil seal. Additionally, remove the right front wheel and turn the steering wheel all the way to the right to facilitate access to the front of the engine.
Remove the front protective cover of the toothed belt and turn the crankshaft until the alignment marks in the camshaft drive are aligned. Loosen the nut securing the tensioner roller axle and turn it until the toothed belt is loosened to the maximum.
Turn on IV gear, loosen the alternator drive belt and remove it from the pulleys. Raise the car on a lift. Having unscrewed the fastening bolt, remove the alternator drive pulley, then the belt from the crankshaft toothed pulley and the pulley itself.
Remove the old oil seal from the oil pump cover, lubricate the new oil seal with engine oil, and press it into the oil pump cover with mandrel 67.7853.9580, proceeding in the same way as when replacing the camshaft oil seal, only without the use of sealant.
A toothed pulley is installed on the crankshaft and a belt is put on it. Install the alternator drive pulley and secure it with a bolt and nut. Put the alternator drive belt on the pulleys and adjust its tension (see sect. «Engine adjustment»).
They drop the car. Slightly tension the toothed belt with the tension roller, turning the roller axis counterclockwise. Turn the crankshaft clockwise two turns and check that the timing marks on the camshaft pulley match (see fig. 7) and flywheel (see fig. 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, slightly pulling it with a tension roller, again check the coincidence of the alignment marks by turning the crankshaft two turns.
If the marks match, then adjust the tension of the toothed belt, as described in chapter «Engine adjustment», and install the front toothed belt guard. Put on and secure the right front wheel. Install all removed nodes.
Connect the wire to the terminal «minus» battery, check and then adjust the ignition timing.