Removing and installing coolant pump - engine codes CUKB, CXUA — AUDI

🧭 Before you start

Fits: Audi A3 (8V, 2012–2020); platform code 85

• Opens: coolant
• Special tools named: T10527/1, VAS 6583, torque wrench
• Renewed: gasket, toothed belt as well

Don't miss

• Disregard (arrows).
• Version with crankcase breather heating: The earth wires must be secured with bolts (arrows) when installing.
• Renew gasket.If coolant pump is being renewed, renew toothed belt as well.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.
• For ease of handling, apply torque wrench VAS 6583 vertically.
• Do not support torque wrench with your other hand.Do not apply excessive force to torque wrench.

🔧 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.

📐 45 workshop diagrams for CJZA

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

📋 Procedure

1. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock.The high-voltage system must be de-energised by a "“high-voltage technician”".Work on the de-energised high-voltage system may only be performed by an "“electrically instructed person”". — De-energise high-voltage system .
2. Remove coolant pipes (left-side) for high-voltage cooling system .
3. Unplug electrical connector (1) at charge pressure sender G31 / intake air temperature sender 2G299. [Note: Disregard (arrows).]
4. Press release tabs on both sides and disconnect line (2) for activated charcoal filter system.
5. Move line for activated charcoal filter system clear at air pipe.

6. Release fasteners (arrows) with release tool T10527 and T10527/1.
7. Detach air pipe (1).
8. Version with crankcase breather heating: Unplug electrical connector (2).
9. Remove bolts (arrows) and detach crankcase breather hose (1). [Note: Version with crankcase breather heating: The earth wires must be secured with bolts (arrows) when installing.]
10. Move clear electrical wiring harness (1).
11. Release hose clips (arrows) and disconnect coolant hoses.
12. Move electrical wiring harness clear (arrows).
13. Unscrew bolts (1, 3) and remove cover (2) for toothed belt for coolant pump.
14. Slacken and remove bolts in the sequence: (5 ... 1).
15. Detach coolant pump with toothed belt. [Note: Renew gasket.If coolant pump is being renewed, renew toothed belt as well.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
16. Check that gaskets are correctly seated (arrows).
17. Lubricate seal for coolant pump lightly with coolant.
18. Fit toothed belt so that it is centred and move coolant pump into installation position.
19. Pre-tighten bolts in the specified sequence:
20. Loosen all bolts again by one turn.
21. Apply torque wrench VAS 6583 with hexagon key (10 mm) (item 6) to coolant pump. [Note: For ease of handling, apply torque wrench VAS 6583 vertically.]
22. Have a second mechanic apply a torque of 30 Nm to coolant pump. [Note: Do not support torque wrench with your other hand.Do not apply excessive force to torque wrench.] — 30 Nm (22 lb-ft)
23. While keeping coolant pump under tension, tighten bolts for coolant pump in specified sequence:
24. Install coolant pipes (left-side) for high-voltage cooling system .
25. ⚠ High voltage can cause fatal injury.Danger of severe or fatal injuries from electric shock.The high-voltage system must be re-energised by a "“high-voltage technician”". — Re-energise high-voltage system . [Note: Do not reuse coolant.]
26. Fill up with coolant .

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