Removing and installing supercharger input shaft seal: VW 1.4 (CAVA, CAVD, CTHA, CTHD, …)

🧭 Before you start

Fits: platform code 138

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

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• Clean sealing surfaces carefully. They must be free of oil and grease.
• Dirt and sealant residues must not be allowed to enter the space.
• Sealant must not be applied too thickly, otherwise excess sealant may enter the space and cause damage.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📐 60 workshop diagrams for CAVA

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

📋 Procedure

1. Remove supercharger
2. Secure compressor on thegearbox support T10108 with 2 bolts(arrow).
3. Pry off the circlip (1) with a slot-head screwdriver (2).
4. Pull out the seal (1) with the puller hooks T20143/1.
5. Put together assembly cone T10208/5 and assembly sleeve T10208/4.

6. Slide the new seal (1) onto the assembly sleeve in the (arrow direction)T10208/5T10208/4 via the assembly cone.
7. Pull down the assembly cone T10208/5 from the assembly sleeve in the (arrow direction)T10208/4.
8. Slide the assembly sleeve T10208/4 onto the compressor shaft.
9. Using the thrust piece T10208/2, press in the seal via the assembly sleeve T10208/4 up to the stop.
10. Press in the new circlip (1) up to the stop also using the assembly tool T10208/2.
11. Undo the securing bolts for the drive unit according to the specified sequence (A) to (H).
12. Turn the gearbox support T10108 until the shaft points to the floor.
13. Unscrew the securing bolts and remove the drive unit (1).
14. Drain compressor oil completely from drive unit.
15. Collect the escaping fluid in a suitable container.
16. Turn the gearbox support T10108 until the pair of gears point upwards.
17. Remove sealant residues from compressor and drive unit with a rotating brush, e.g. a hand drill with a plastic brush (wear eye protection).
18. Clean sealing surfaces carefully. They must be free of oil and grease.
19. Dirt and sealant residues must not be allowed to enter the space.
20. ⚠ Add only the oil specified in repair set Electronic Parts Catalogue. — Fill the space (arrow) with new oil (44 ml) from the repair set. [Note: Sealant must not be applied too thickly, otherwise excess sealant may enter the space and cause damage.]
21. Apply sealant to the sealing surface on the compressor.
22. Tighten the new securing bolts for the drive unit to "“12 Nm”" according to the specified sequence (A) to (H). — 12 Nm (8.9 lb-ft)
23. Install supercharger

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