Removing and installing turbochargers - vehicles with engine codes CGQB, CVUB, CVUC, DEHA — AUDI

🧭 Before you start

Fits: Audi Q5 (8R, 2008–2017)

• Opens: coolant
• Special tools named: 3094
• Renewed: charge air cooler, gaskets

Don't miss

• Place a cloth underneath to catch escaping coolant.
• Disregard (item 2).
• Disregard (arrows).
• Disregard (item 3).
• Disregard (item 1).

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ If the turbocharger has suffered mechanical damage (e.g. damaged compressor wheel), it is not sufficient merely to fit a new turbocharger. The following work must be performed in order to avoid further damage:Check air cleaner housing, air filter element and air hoses for dirt and foreign particles.Check the entire charge air system (including the charge air cooler) for foreign matter.If foreign matter is found in the charge air system, clean all relevant ducts and hoses and renew charge air cooler if necessary. — Remove air cleaner housing .
2. Drain coolant .
3. Remove plenum chamber partition panel (5)General body repairs, exterior50Bulkhead; Exploded view - plenum chamber partition panel.
4. ⚠ Electronic components are susceptible to damage.Observe notes on procedure for disconnecting the battery. — Disconnect earth wire (arrow) from battery terminal Electrical system27Battery, Disconnecting and connecting battery.
5. Release retainer (arrow A) and open cover (arrow B).

6. Unplug electrical connector (1).
7. Remove nuts (2, 3 and 4) and move electrical wiring clear. [Note: Place a cloth underneath to catch escaping coolant.]
8. Release hose clips (2 and 3) and disconnect coolant hoses (1 and 4) from heat exchanger. [Note: Ignore 3094.]
9. Unplug electrical connectors (1 ... 4) and move wiring harness clear.
10. ⚠ Risk of damage to turbocharger shaft.The shaft of the compressor blades projects beyond the contour of the turbocharger housing.Take care not to damage compressor blades when connecting pipe is removed. — Remove bolts (arrows) and detach connecting pipe (1).
11. Remove front exhaust pipe .
12. Remove exhaust gas temperature sender 3G495(item 1) and pressure pipe (3) for pressure differential sender G505 . [Note: Disregard (item 2).]
13. Detach electrical connector (1) and, if fitted, (4) from bracket and unplug connectors.
14. If fitted, unscrew and detach exhaust gas temperature sender 2G448(item 3). [Note: Disregard (item 2).]
15. Unscrew nuts (arrows) and press catalytic converter towards rear.
16. Remove bolts (arrows) and detach heat shield (1).
17. Remove bolts (arrows).
18. Detach vacuum hose (1) and press vacuum line to one side.
19. Remove banjo bolts (arrows) and disconnect oil supply line (1).
20. Remove bolts (3, 4) and union nuts (1, 2) for coolant supply line.
21. Release hose clip (1) and detach coolant hose. [Note: Disregard (arrows).]
22. Disconnect vacuum hose (2) and move clear vacuum hose and vacuum line (1) at connection.
23. Press release tabs and detach crankcase breather hose (1).
24. Remove bolt (1). [Note: Disregard (item 2).]
25. Remove bolts (arrows).
26. Disconnect air pipe (right-side) (2) together with intermediate pipe (1) from turbocharger unit and move clear to one side. [Note: Disregard (item 3).]
27. Open clamp (1) and detach bypass valve (2).
28. Unscrew bolts (1) and swivel lug to one side.
29. Remove bolts (1) on both sides.
30. Loosen bolts (left and right) (3) on bracket (2) for turbocharger.
31. Open clamp (arrow) on both sides and slide onto exhaust manifold.
32. ⚠ Risk of damage to oil return pipe.Do not bend oil return pipe. — Remove bolts (1) for oil return pipe. [Note: Disregard (item 2).]
33. Remove bolts (2) for exhaust gas recirculation pipe. [Note: Disregard (item 1).]
34. Remove bolts (1, 2 and 3).
35. ⚠ Risk of damage to turbocharger shaft.The turbocharger shaft projects beyond the contour of the turbocharger housing. — Engage lifting tackle2024 A on turbocharger unit and workshop hoistVAS 6100.
36. Take care when detaching turbocharger unit. [Note: Renew gaskets, seals and O-rings.Fill turbochargers with engine oil at connections for oil supply line.Secure all hose connections with the correct type of hose clips (same as original equipment) Electronic parts catalogue.After installing the turbocharger unit, allow the engine to idle for approx. 1 minute without pressing the accelerator to ensure that the turbocharger is supplied with oil.]
37. Electrical connections and routing .
38. Install front exhaust pipe .
39. Install air pipe .
40. Install air duct .
41. Fill up with coolant .

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