Front oil seal (from the pulley side) - replacement
Remove the timing belt as described previously.
1. Remove the crankshaft pulley bolt and remove the sprocket and woodruff key from the shaft.
2 Remove the seal from the housing using a special puller (figure G:26), or press it with a screwdriver so as not to damage the aluminum casting of the case.
3. Inspect the oil seal seat - it should be free of dirt, oil, burrs and other damage that could prevent the oil seal from seating properly. Clean the surfaces of the oil seal seat and the crankshaft journal and lubricate them.
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4 Press the new seal into the housing using the tool shown in Figure G:27 or a suitable size socket wrench to a depth of 2 mm from the housing surface. The seal must be installed evenly in the housing seat, without any distortion.
5. Install the woodruff key and sprocket onto the crankshaft. Secure the sprocket with the bolt and tighten it to 8.0 kg·m.
6. Install the timing belt and associated parts as described previously.
Rear oil seal (from the flywheel side) - replacement
The rear crankshaft oil seal can be replaced without removing the engine from the car, but it is necessary to remove the gearbox, flywheel and clutch - see chapter "Clutch and manual transmission".
1. On models with automatic transmission, it is necessary to remove the drive plate installed in place of the clutch and flywheel. Be careful not to lose the adjusting plate installed between the drive plate and the crankshaft.
2. Remove the seal from the housing using a screwdriver. Be careful not to damage the socket in the aluminum housing of the seal.
3. Clean the oil seal seat and the surface of the crankshaft journal. Lubricate the crankshaft journal.
4. Insert the new seal into the housing and press it into place evenly, without tilting. To ensure the integrity of the seal's working edges and to ensure correct installation, use the protective sleeve 10-205 (figure G:29). Although there is a special VW tool for installing the seal (figure G:30), with the same success, the seal can be pressed in by hand.
5. Install the clutch, flywheel and gearbox as described in Chapter "Clutch and manual transmission".
6. On models with automatic transmission, after installing the drive disc on the crankshaft, check the distance between the outer edge of the disc and the cylinder block surface (figure G:32), which should be within 30.5-32.1 mm. If necessary, adjust this distance by installing an adjusting plate of a different thickness between the drive disk and the crankshaft flange (1, figure G:31). Before tightening the bolts, check for the presence of the reinforcement plate (2) on the outside of the drive disc. Apply thread locking fluid (such as "Loctite") to the bolt threads.
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