Removing and installing 4/2-way valve with thermostat: Audi A1 (CAAA, CAAB, CAAC, CAAD, …)

🧭 Before you start

Fits: Audi A1 (8X, 2010–2018)

• Opens: coolant

Don't miss

• Disregard (item 4).
• Disregard (items 2, 3, 4).
• Disregard (items 2, 3).
• Do not reuse coolant.

🔧 Engine codes this applies to

📐 31 workshop diagrams for CAAA

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

📋 Procedure

1. Drain coolant .
2. Remove air cleaner housing .
3. Version for countries with cold climates: Unplug electrical connector (2).
4. Press release tabs and disconnect crankcase breather hose (1).
5. Disconnect vacuum hose (arrow).

6. Remove bolt (3), swivel air pipe with connection to rear and detach from turbocharger. [Note: Disregard (item 4).]
7. Unclip wiring harness from retainer (arrow).
8. Release hose clips (1) and (2) and remove air hose.
9. Remove bolts (arrows).
10. Using removal lever80 - 200, move clear electrical wiring and hoses at air pipe (left-side).
11. Loosen hose clip (3) and detach air pipe (left-side).
12. Release hose clips (1), detach coolant hoses and move clear. [Note: Disregard (items 2, 3, 4).]
13. Take electrical connector (1) for Hall sender G40 out of retainer.
14. Remove bolts (arrows), pull off coolant pipe (front) from 4/2-way valve to left side and leave in installation position. [Note: Disregard (items 2, 3).]
15. Release hose clips (1) and (2) and remove air hose.
16. Seal off open pipes/lines and connections with clean plugs from engine bung setVAS 6122.
17. Remove bolts (arrows).
18. Move coolant hose (3) clear.
19. Loosen hose clip (2).
20. Unplug electrical connector (1) at charge pressure sender G31/intake air temperature sender G42 and detach air pipe (right-side).
21. Pull oil dipstick out slightly and remove bolt (1).
22. Release clip (2) with removal lever80 - 200.
23. Pull guide tube for oil dipstick upwards out of cylinder block and push to one side.
24. Remove bolts (2).
25. Loosen hose clips (1, 3, 4), detach coolant hoses and remove 4/2-way valve with thermostat.
26. Install dipstick guide tube .
27. Install coolant pipe (front) .
28. Install air pipes .
29. Install intake connecting pipe .
30. Electrical connections and routing .
31. Install battery mounting and battery Electrical system27.
32. Install air cleaner housing .
33. Install air hoses with screw-type clips . [Note: Do not reuse coolant.]
34. Fill up with coolant .

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