Timing Chain Component Overview

Fig 1: Timing Chain Component Overview

Courtesy of AUDI OF AMERICA, LLC

1. Control Housing
   • Removal and installation, refer to CAMSHAFTS 
   • Disassembling and assembling, refer to Figure
   • Check screen for dirt, refer to Figure
   • Lightly lubricate contact surfaces of oil seals before installing
2. Bolt
   • Replace
   • 8 Nm
3. Camshaft Timing Chain
   • Before removing, mark direction of rotation with paint, refer to Fig 2
   • Remove from camshafts, refer to CAMSHAFT TIMING CHAIN 
   • Removal and installation, refer to TIMING MECHANISM DRIVE CHAIN AND CAMSHAFT TIMING CHAIN 
4. Camshaft Adjuster, Exhaust Side
   • Identification: "32A"
   • Removal and installation, refer to CAMSHAFT TIMING CHAIN 
5. Intermediate Shaft
6. Thrust Washer
7. Bolt
   • Insert with locking compound; Locking compound.
   • 8 Nm
8. Timing Chain Tensioning Rail
   • Remove to remove and install timing chain upper and lower covers
9. Mounting Pin
10. Camshaft Timing Chain Tensioner
    • Removal and installation, refer to CAMSHAFT TIMING CHAIN 
    • 40 Nm
11. Seal
    • Replace if leaking or damaged
12. Timing Mechanism Drive Chain Sprocket
    • Removal and installation, refer to TIMING MECHANISM DRIVE CHAIN AND CAMSHAFT TIMING CHAIN 
13. Camshaft Timing Chain Sprocket
    • Removal and installation, refer to TIMING MECHANISM DRIVE CHAIN AND CAMSHAFT TIMING CHAIN 
14. Bolt
    • Use Counterhold T10069 on vibration damper to loosen and tighten
    • Replace
    • 60 Nm plus an additional 90° (¹ /₄ ) turn.
15. Chain Tensioner with Tensioning Rail
    • For drive chain
    • Before installation release the locking device in the chain tensioner with a small screwdriver and press the tensioning plate against the chain tensioner
16. Drive Sprocket
    • Integral part of crankshaft
17. Power Take-Off Drive Chain
    • Before removing, mark direction of rotation with paint, refer to Fig 2
    • Removal and installation, refer to TIMING MECHANISM DRIVE CHAIN AND CAMSHAFT TIMING CHAIN 
18. Timing Mechanism Drive Chain Guide Rail
    • Removal and installation, refer to TIMING MECHANISM DRIVE CHAIN AND CAMSHAFT TIMING CHAIN 
19. Pin
    • For guide rail
    • 10 Nm
20. Mounting Pin
    • 18 Nm
21. Bolt
    • 23 Nm
22. Camshaft Adjuster, Intake Side
    • Identification: "24E"
    • Removal and installation, refer to CAMSHAFT TIMING CHAIN 
23. Bolt
    • To loosen and tightening, counterhold with open-end spanner on camshaft hex head, refer to CAMSHAFT TIMING CHAIN 
    • Replace
    • Contact surface of sensor wheel at screw head must be dry when installing
    • 60 Nm plus an additional 90° (¹ /₄ ) turn.
24. Camshaft Timing Chain Guide Rail
    • Removal and installation, refer to CAMSHAFT TIMING CHAIN 
25. Camshaft Adjustment Valve 1 -N205-
    • For intake camshaft
    • Mark the electrical connector before disconnecting
26. Camshaft Adjustment Valve 1 (exhaust) -N318-
    • For exhaust camshaft
    • Mark the electrical connector before disconnecting
27. Camshaft Timing Chain Guide Rail
    • Clipped in at control housing

Fig 2: Identifying Markings On Roller Chains

Courtesy of AUDI OF AMERICA, LLC

-- Mark timing chain running direction with arrows using paint -arrows- for reinstallation.

Fig 3: Identifying Marks On Control Housing With MPI Engines

Courtesy of AUDI OF AMERICA, LLC

-A- Flywheel-side view

-B- Vibration damper-side view

Notches -arrows- are reference points for markings on camshaft adjusters.