TorqFix

Installing engine — AUDI

Installing engine on Audi: 70 steps, 36 torque figures, engines ACK, AFB, AFN, AGA. What to remove, what to tighten and to how many Nm, what to check.

Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.

70 steps 40 engine codes 36 torque figures engine codes and torque figures merged from 152 documented variants

🔧 Engine codes this applies to

ACKAFBAFNAGAAGEAGUAHAAJGAJMAJQAKEAKFAKNALFALGALTALWALZAMBAMKAMLAMMAMUAMXANYAPCAPPAPRAPSAPXAPYAPZAQAAQDARJARNARXARYARZASB

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

TorqueFastener / step
10 Nm (7.4 lb-ft)Screw in first bolt (arrow), tighten
10 Nm (7.4 lb-ft)Tighten bolts (B) and (C) initially
10 Nm (7.4 lb-ft)Tighten first bolt (1)
10 Nm (7.4 lb-ft)Tighten first bolt (arrow)
15 Nm (11 lb-ft)Tighten nut (1)
2 Nm (1.5 lb-ft)Hand-tighten first bolt (arrow
2 Nm (1.5 lb-ft)Screw in first bolt (arrow) hand-tight
20 Nm (15 lb-ft)Attach support at tapped holes for torque reaction support and tighten
20 Nm (15 lb-ft)Tighten base plates for support elements
20 Nm (15 lb-ft)Tighten base plates for support elements on scissor-type assembly platformVAS 6131 A
20 Nm (15 lb-ft)Tighten nut (1) for positive terminal
22 Nm (16 lb-ft)Secure fuel hose at connection for fuel rail pipe
22 Nm (16 lb-ft)Tighten bolt (C)
22 Nm (16 lb-ft)Tighten union nut on fuel supply pipe (1)
23 Nm (17 lb-ft)Tighten bolts (arrows)
25 Nm (18 lb-ft)Tighten bolts (A)
3 Nm (2.2 lb-ft)Initially tighten bolts (1)
3 Nm (2.2 lb-ft)Initially tighten bolts (A)
3 Nm (2.2 lb-ft)Initially tighten bolts (arrow 1)
3 Nm (2.2 lb-ft)Tighten bolts (arrows)
35 Nm (26 lb-ft)Tighten bolts (2)
35 Nm (26 lb-ft)Tighten bolts (arrow 2)
35 Nm (26 lb-ft)Tighten bolts (arrows)
35 Nm (26 lb-ft)Tighten bolts (B)
35 Nm (26 lb-ft)Tighten bolts (B) and (C)
40 Nm (30 lb-ft)Tighten bolts (B) and (C)
45 Nm (33 lb-ft)Then tighten bolts (1)
45 Nm (33 lb-ft)Tighten bolts (1)
45 Nm (33 lb-ft)Tighten bolts (A)
45 Nm (33 lb-ft)Tighten bolts (arrow 1)
60 Nm (44 lb-ft)In this crankshaft position, screw in next bolt (arrow) and tighten
60 Nm (44 lb-ft)Turn crankshaft a further 120° and tighten last bolt
60 Nm (44 lb-ft)Turn crankshaft a further 120°, then screw in next bolt and tighten
9 Nm (6.6 lb-ft)Tighten earth stud (1)
9 Nm (6.6 lb-ft)Tighten earth stud (2)
9 Nm (6.6 lb-ft)Tighten nut (arrow)

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. ⚠ When working on all parts of the exhaust system:Observe safety precautions when working on the exhaust system . — Before installing gearbox, remove residue from threaded holes for engine/gearbox bolts in cylinder block using a thread tap.
  2. Before installing an exchange engine, check whether flat-section O-ring (arrow) is fitted in drive shaft of power steering pump.
  3. Install engine support and engine mounting .
  4. Install turbocharger (left-side) .
  5. The following preparations are required before joining engine and gearbox.
ACK? Steps differ between engine variants — check this job against your exact car before you commit to it. Check my car — free →
  1. Turn torque converter until hole is visible next to notch (arrow) in recess in bottom of gearbox housing, as shown in illustration. [Note: There is only one notch on the circumference; turn the torque converter accordingly.]
  2. Insert transport lock T40170 into gearbox housing from below and clamp onto flange shaft (1).
  3. Hold ATF lines in installation position when joining engine and subframe.
  4. Check whether dowel sleeves (A) for centring engine and gearbox are fitted in cylinder block; install missing dowel sleeves.
  5. Check whether aluminium bolts securing engine to gearbox can be reused; if so, apply marking 37Removing and installing gearbox; Tightening torques for gearbox.
  6. Bring gearbox into position on engine (pay attention to starter).
  7. Tighten bolts (1 ... 12).
  8. Remove transport lock T40170. [Note: The following step is necessary to ensure that the torque converter is straight and that it makes even contact with the drive plate.]
  9. Use assembly lever (1) to press torque converter (2) slightly against drive plate (3) in direction of (arrow).
  10. Hand-tighten first bolt (arrow) (2 Nm). — 2 Nm (1.5 lb-ft)
  11. Insert guide pin of adapter T40058 as follows:
  12. Turn crankshaft 180° further in normal direction of engine rotation (arrow) with adapter T40058.
  13. Tighten bolt accessible in this crankshaft position to specified torque 32Torque converter; Exploded view - torque converter.
  14. Turn crankshaft by 60° each time and tighten remaining 5 bolts to specified torque 32Torque converter; Exploded view - torque converter.
  15. Install poly V-belt tensioner .
  16. Secure drive shafts to gearbox flange shafts Running gear, axles, steering40Drive shaft; Exploded view - drive shaft.
  17. Install ATF cooler 37ATF circuit; Removing and installing ATF cooler.
  18. Install coolant pipe (right-side) on gearbox: up to model year 2013 ; from model year 2014 onwards .
  19. Install ATF lines 37ATF circuit; Removing and installing ATF lines.
  20. Install gearbox mounting with gearbox support .
  21. Secure coolant pipes to turbocharger .
  22. Install power steering hydraulic line Running gear, axles, steering48Hydraulic power steering; Exploded view - hydraulic lines, reservoir.
  23. Install particulate filter .
  24. Install pressure differential sender .
  25. Install catalytic converter .
  26. Install NOx sender G295.
  27. Raise engine/gearbox assembly using scissor-type assembly platformVAS 6131 A.
  28. Align subframe and tunnel cross member on longitudinal members according to markings made before removal.
  29. Tighten bolts for tunnel cross-piece 37Assembly mountings; Exploded view - assembly mountings.
  30. Tighten subframe bolts only to specified torque (do not turn further); the bolts should only be fully tightened after performing the wheel alignment check Running gear, axles, steering40Subframe; Exploded view - subframe.
  31. ⚠ Risk of accident because of loose bolted connections.Do NOT drive the vehicle unless the subframe bolts have been tightened to their final torque. — Install injector for reducing agent N474.
  32. Install manual release cable 37Selector mechanism; Exploded view - selector mechanism.
  33. Install propshaft Final drive39Propshaft; Removing and installing propshaft.
  34. Secure intermediate steering shaft to steering rack Running gear, axles, steering48Steering column; Removing and installing intermediate steering shaft.
  35. Install upper suspension links and suspension strut Running gear, axles, steering40Suspension strut, upper links; Exploded view - suspension strut, upper links.
  36. Install subframe cross brace and anti-roll bar Running gear, axles, steering40Subframe; Exploded view - subframe.
  37. Install struts at gearbox mountings .
  38. Install brake calipers Brake system46Front brakes; Removing and installing brake caliper.
  39. Install exhaust pipe for auxiliary heater Auxiliary heater, supplementary heater82Auxiliary/supplementary heater; Removing and installing silencer with bracket.
  40. Install positive wires at positive terminal Electrical system27Jump start terminal; Exploded view - jump start terminal.
  41. Install longitudinal members (bottom) General body repairs, exterior50Lock carrier; Exploded view - lock carrier.
  42. Install electrical wiring, fuse holder and cover for electronics box in engine compartment Electrical system97Relay carriers, fuse carriers, electronics boxes; Overview of fitting locations - relay carriers, fuse carriers, electronics boxes, and .
  43. Install bracket for changeover valve .
  44. Install air conditioner compressor Heating, air conditioning87Air conditioner compressor; Detaching and attaching air conditioner compressor at bracket.
  45. Install poly V-belt .
  46. Install closure plate for bumper cover (front) General body repairs, exterior63Bumper (front); Removing and installing attachments.
  47. Service electrical wire leading to catalytic converter heater 2Z120Electrical system; General information97Electrical connectors; Repairing electrical wiring harnesses and electrical connectors.
  48. Observe steps required after re-connecting battery Electrical system27Battery; Disconnecting and connecting battery.
  49. Install body brace Running gear, axles, steering40Suspension strut, upper links; Exploded view - suspension strut, upper links.
  50. Install plenum chamber cover General body repairs, exterior50Bulkhead; Removing and installing plenum chamber cover.
  51. Install high-pressure pipe .
  52. Install air cleaner housing .
  53. ⚠ Risk of irreparable damage to control units because of excessive voltage.Never use battery charging equipment for boost starting. — Fill with engine oil and check oil level 410.
  54. Before starting engine, top up hydraulic fluid in power steering reservoir Running gear, axles, steering48Hydraulic power steering; Checking power steering fluid level. [Note: The power steering pump must not be run when dry.]
  55. Install coolant pipe (bottom) . [Note: Do not reuse coolant.]
10 more steps

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Other AUDI procedures

Who makes these pages, and how

TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.

The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.

Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.

Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com

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Workshop data on this page last updated 20 Sep 2026.