Renewing supercharger drive unit seal: VW 1.4 (CAVD, CNWA, CTHD, CTKA)

🧭 Before you start

Fits: platform codes 5C7, 5C1

• Special tools named: T10208/5, T10208/4

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• Clean sealing surfaces carefully. They must be free of oil and grease.
• Ingress of dirt and sealant residues into housing must be avoided.
• Sealant must not be applied too thickly. Otherwise excess sealant can enter housing and cause damage.

🔧 Engine codes this applies to

📐 46 workshop diagrams for CAVD

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Secure supercharger to gearbox support T10108 using two bolts (arrows).
2. Remove circlip (1) using a flat-bladed screwdriver (2).
3. Remove seal (1) using extractor hook T20143/1.
4. Put together assembly cone T10208/5 and assembly sleeve T10208/4.
5. Fit new seal (1) in (direction of arrow) over assembly cone T10208/5 and onto assembly sleeve T10208/4.

6. Pull assembly cone T10208/5 off assembly sleeve T10208/4 in (direction of arrow).
7. Push assembly sleeve T10208/4 onto supercharger shaft.
8. Press in seal to stop using thrust piece T10208/2 and assembly sleeve T10208/4.
9. Press in new circlip (1) to stop also using assembly sleeve T10208/2.
10. Loosen drive unit securing bolts (A) through (H) in sequence given.
11. Rotate gearbox support T10108 until shaft points downwards.
12. Unscrew securing bolts and remove drive unit (1).
13. Drain supercharger oil from drive unit.
14. Collect drained oil in a suitable container.
15. Rotate gearbox support T10108 until sprockets point upwards again.
16. Remove sealant residues from supercharger and drive unit with a rotating brush, e.g. a hand drill with a plastic brush (wear eye protection).
17. Clean sealing surfaces carefully. They must be free of oil and grease.
18. Ingress of dirt and sealant residues into housing must be avoided.
19. Fill fresh oil (arrow) into housing. [Note: Sealant must not be applied too thickly. Otherwise excess sealant can enter housing and cause damage.]
20. Apply sealant to sealing surface of supercharger.
21. Tighten the new securing bolts for the drive unit in the sequence (A) to (H).

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