Table of contents: Replacing the front oil seal ↓ Removal and installation the front… ↓
Note: Replacing the rear oil seal and its holder on 2.0 TFSI engines is done in the same way as on the 2.0 MPI engine (see Section 11).
1. The crankshaft seal parts are shown in the illustration 11.1.
Replacing the front oil seal
2. Remove the alternator belt (see Section 19) and timing belt (see Section 22).
3. Fix the crankshaft gear using support No.3415, unscrew its mounting bolt and remove the gear (see illustration 11.4).
4. Unscrew the central bolt (20 in the illustration) gear wheel (19) of the crankshaft and remove the gear wheel and diamond-coated washer (18).
5. Screw the gear mounting bolt back into the crankshaft by hand. Unscrew the inner part of puller #3203 by 9 turns (approximately 20 mm) from the outer part and secure with a knurled screw. Lubricate the threaded head of the puller with engine oil, install it and, pressing hard, screw it as deep as possible into the seal (see illustration 11.5). Loosen the knurled bolt and turn the inside of the puller against the crankshaft until the seal is pulled out. Clamp the puller in a vice at the flat spots and remove the seal from it with pliers.
6. Clean the working and sealing surface. Remove any remaining oil from the crankshaft connecting rod journal with a clean rag, place guide bush No. T1 0053/1 (see illustration 11.6) and slide the oil seal through the guide sleeve onto the crankshaft journal.
7. Press the oil seal flush with the central bolt of the gear wheel and the bushing from the mounting device No. T10053 (see illustration 11.7).
8. Fit the toothed wheel with a new washer (diamond coated) and, holding it from turning with support No.3415 (see illustration 11.4), tighten the new mounting bolt.
Note: There must be no oil on the mating surfaces between the gear wheel and the crankshaft: the bolt should also be screwed in without additional lubrication.
9. Further installation is carried out in the reverse order of dismantling the components.
Removal and installation the front oil seal holder
10. Follow the steps described in paragraphs 2-4.
11. Remove the bolts (1-10 in illustration 11.13) and remove the front oil seal holder. Press the oil seal out of the removed holder. Seal the torn off part of the engine crankcase with a rag.
12. Carefully remove any remaining sealant from the cylinder block, oil pan and seal cover. Clean the mounting surfaces from oil and grease.
13. Apply a 2 mm diameter bead of sealant to the joints of the cylinder block and oil pan (see illustration 11.15).
14. Apply a 2-3 mm diameter bead of sealant to the clean seating surface of the front oil seal retainer in accordance with Illustration 11.16. Additionally, apply an even layer of sealant to the entire area of the lower mating surface of the oil seal retainer.
Note: The seal holder must be installed within 5 minutes after applying the sealant.
13. Carefully slide the oil seal holder onto the cylinder block, tighten the bolts (1-10 in illustration 11.13) its fastenings, install a new oil seal, gear wheel and other parts (see subsection above).
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