Removing and installing coolant pipes (left-side): Audi A4 Cabriolet B6/B7 / A4 B6/B7 (AUK, BDW, BDX, BKH, …)

🧭 Before you start

Fits: Audi A4 Cabriolet B6/B7 (8H), Audi A4 B6/B7 (8E)

• Opens: coolant
• Renewed: o-rings

Don't miss

• Before removing, mark direction of rotation of poly V-belt with chalk or felt-tipped pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.
• To prevent damage to the refrigerant lines, ensure that the pipes and hoses are not stretched, kinked or bent.
• Disregard (item 1).
• Before installing, clean and smoothen sealing surface for O-ring.

🔧 Engine codes this applies to

📋 Procedure

1. Pull off engine cover panel (front) (arrows).
2. Remove bolts (arrows).
3. Remove air ducts (1) and (2).
4. Vehicles with auxiliary heater: remove bolts (arrows) securing exhaust pipe for auxiliary/additional heater to noise insulation.
5. Release quick-fasteners (1) and (2) and take off front noise insulation. Leave rear noise insulation in position.

6. Remove bumper cover (front) 63.
7. Move lock carrier to service position 50.
8. Remove oil cooler . [Note: Before removing, mark direction of rotation of poly V-belt with chalk or felt-tipped pen. If the belt runs in the opposite direction when it is refitted, this can cause breakage.]
9. To slacken poly V-belt turn tensioner in direction of (arrow).
10. Remove poly V-belt from coolant pump.
11. Release pressure from the tensioner.
12. Unplug electrical connector (1) for magnetic clutch on air conditioner compressor.
13. ⚠ The air conditioner refrigerant circuit must not be opened. — Unscrew air conditioner compressor from bracket (arrows). [Note: To prevent damage to the refrigerant lines, ensure that the pipes and hoses are not stretched, kinked or bent.]
14. Tie up air conditioner compressor with lines attached to left-side of vehicle.
15. Remove bolts (arrows) and detach bracket for AC compressor.
16. Remove bolts (arrows) and disconnect coolant pipes from engine (2). [Note: Disregard (item 1).] [Note: Renew O-rings.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.]
17. Before installing, clean and smoothen sealing surface for O-ring.
18. Lubricate new O-ring with coolant additive and slide onto coolant pipe.
19. Install air conditioner compressor 87.
20. Install poly V-belt .
21. Install oil cooler .
22. Install lock carrier with attachments 50.
23. Install bumper cover (front) 63.
24. Fill cooling system .

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