Renewing vacuum unit for turbocharger, versions 1 and 2: VW Golf Cabriolet (CKFC, CLHA, CLHB, CLHC, …)

🧭 Before you start

Fits: VW Golf Cabriolet (517, 2011–2016); platform code 138

• Renewed: bolts

Don't miss

• When removing and installing the circlip, do not apply too much force on the lever linkage. The turbocharger may be damaged when the circlip is pushed down, e.g using a large screwdriver.
• Use new bolts and a new circlip from the repair kit.
• The illustration shows the version 1.

🔧 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.

📋 Procedure

1. Remove engine cover panel .
2. Disconnect electrical connector (3) at position sender for charge pressure positioner G581.
3. Pull vacuum hose (2) from turbocharger vacuum unit. [Note: When removing and installing the circlip, do not apply too much force on the lever linkage. The turbocharger may be damaged when the circlip is pushed down, e.g using a large screwdriver.]
4. Remove circlip (4).
5. Unscrew bolts (1) for vacuum unit.

6. Detach control rod from adjusting lever, and remove vacuum unit together with position sender for charge pressure positioner G581.
7. Disconnect electrical connector (2) at position sender for charge pressure positioner G581.
8. Pull vacuum hose (1) from turbocharger vacuum unit. [Note: When removing and installing the circlip, do not apply too much force on the lever linkage. The turbocharger may be damaged when the circlip is pushed down, e.g using a large screwdriver.]
9. Remove circlip (4).
10. Unscrew bolts (3) for vacuum unit.
11. Detach control rod from adjusting lever, and remove vacuum unit together with position sender for charge pressure positioner G581. [Note: Use new bolts and a new circlip from the repair kit.]
12. Attach control rod to adjusting lever, fit vacuum unit, and screw in bolts (1) to stop by hand. [Note: When removing and installing the circlip, do not apply too much force on the lever linkage. The turbocharger may be damaged when the circlip is pushed down, e.g using a large screwdriver.]
13. Install circlip (4).
14. Connect connector (3) to position sender for charge pressure positioner G581.
15. Attach control rod to adjusting lever.
16. Fit vacuum unit, and screw in bolts (3) to stop by hand. [Note: When removing and installing the circlip, do not apply too much force on the lever linkage. The turbocharger may be damaged when the circlip is pushed down, e.g using a large screwdriver.]
17. Install circlip (4).
18. Connect connector (2) to position sender for charge pressure positioner G581.
19. Tighten bolts (1).
20. Seal bolts with sealing paint from repair kit.
21. Fit engine cover panel .
22. Connect vehicle diagnostic tester.
23. Start engine and clear event memory .
24. Carry out basic setting of vacuum unit.
25. Follow the path below to perform basic setting:
26. To do this, measure the raw voltage.
27. Use for this.
28. Read voltage value in self-diagnosis.
29. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (A) for "“vacuum”".
30. Connect hand vacuum pumpVAS 6213 to vacuum unit (arrow).
31. ⚠ Risk of damage to the vacuum unit due to excessive negative pressure.The negative pressure must never exceed 800 mbar. — Operate hand vacuum pumpVAS 6213 until a negative pressure of 650…700 mbar is indicated on the pressure gauge.
32. Move vacuum unit in (direction of arrow), until a voltage value of 0.75 ± 0.02 Volt is indicated on the .
33. Tighten bolts (1) to 10 Nm. — 10 Nm (7.4 lb-ft)
34. Move vacuum unit in (direction of arrow), until a voltage value of 0.75 ± 0.02 Volt is indicated on the .
35. Tighten bolts (1) to 10 Nm. — 10 Nm (7.4 lb-ft)
36. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (B) in order to relieve the pressure from the vacuum unit so that ambient pressure is attained.
37. Move slide ring (1) on hand vacuum pumpVAS 6213 to position (A) for "“vacuum”".
38. Operate hand vacuum pumpVAS 6213 until a negative pressure of -650…-700 mbar is indicated on the pressure gauge.
39. A voltage value of 0.75 ± 0.02 Volt must be indicated on the . [Note: The illustration shows the version 1.]
40. Loosen bolts (1).
41. Adjust voltage value .
42. Seal bolts with sealing paint from repair kit.
43. Fit engine cover panel .
44. Start engine, and clear event memory .
45. Carry out basic settings .

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