Overview - Camshaft Timing Chains

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Fig 1: Camshaft Timing Chains Exploded View

Courtesy of AUDI OF AMERICA, LLC

Bolt
- For steel bolts: 9 Nm
- For aluminum bolts: 4 Nm + 90°
- Always replace after removing.
Chain Tensioner
- Is under tension
- Secure using : T40267 before removing
Timing Chain Tensioning Rail
Guide Pin
- 20 Nm
Bolt
- Tightening Specifications and Sequence. Refer to Fig 4.
- Always replace the aluminum bolt after removal
Adapter Sleeve
- Depending on the version, not present on every bearing bracket
Control Valves
- 35 Nm
- Left-hand thread
- Different versions depending on the version.
- Remove from the : T10352A using a tool
- Checking. Refer to Fig 2.
Bearing Bracket
- Assembly instructions. Refer to Fig 3.
- Removing and installing. Refer to BEARING BRACKET, REMOVING AND INSTALLING .
Camshaft Timing Chain Guide Rail
Camshaft Housing
Camshaft Timing Chain
- Before removing, mark the running direction with paint
- Removing and installing. Refer to CAMSHAFT TIMING CHAIN, REMOVING AND INSTALLING .
- After procedures on the chain drive perform the adaptation using the Vehicle Diagnostic Tester
Camshaft Timing Chain Guide Rail
Guide Pin
- 20 Nm
Three Stage Chain Sprocket
- Crankshaft
- Installation position. Refer to Fig 5.

Checking the Control Valve

Fig 2: Checking The Control Valve

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Bearing Bracket - Assembly Instructions

Fig 3: Bearing Bracket - Assembly Instructions

Courtesy of AUDI OF AMERICA, LLC

If a new bearing bracket -3- with adapter sleeve -4- should be installed, it must be checked before installing the bearing bracket in the hole -arrow- in the cylinder head -1-.

If the hole -arrow- is not designed for using the adapter sleeve -4- the adapter sleeve must be removed from the bearing bracket. For this hole the short bolt -2- should be used. Refer to the Parts Information for the correct bolt.

Bearing Bracket - Tightening Specifications and Sequence

Fig 4: Bearing Bracket - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts in the steps shown in the sequence:

For Steel Bolts

Step	Bolts	Tightening Specifications
1.	-1 to 6-	Install by hand all the way
2.	-1 to 6-	9 Nm

For Aluminum Bolts

Replace the bolts that were tightened with an additional turn after removing them.

Step	Bolts	Tightening Specification/Additional Turn
1.	-1 to 6-	Install by hand all the way
2.	-1 to 6-	4 Nm
3.	-1 to 6-	180° additional turn

Three Stage Chain Sprocket - Installed Position

Fig 5: Chain Sprocket Crankshaft

Courtesy of AUDI OF AMERICA, LLC

Both surfaces -arrows- must align.