Overview - Camshaft Timing Chain, Engine With Two Camshaft Adjusters

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Fig 1: Exploded View Of Camshaft Timing Chain (Engine With Two Camshaft Adjusters)

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 4 Nm + 90°
- Always replace after removing
Chain Tensioner
- Is under tension
- Secure using the Locking Tool:T40267 before removing
Timing Chain Tensioning Rail
Guide Pin
- 20 Nm
Bolt
- Tightening Specifications and Sequence. Refer to Fig 4.
- Aluminum bolt: Always replace 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.
- Checking using the Vehicle Diagnostic Tester Fig 2.
Bearing Bracket
- Assembly instructions. Refer to Fig 3.
- Removing and installing. Refer to BEARING BRACKET, REMOVING AND INSTALLING, ENGINE WITH TWO CAMSHAFT ADJUSTERS .
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, ENGINE WITH TWO CAMSHAFT ADJUSTERS .
- 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.

Fig 2: View Of Control Valve

Courtesy of AUDI OF AMERICA, LLC

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.

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

Fig 5: Chain Sprocket To Crankshaft Installation Position

Courtesy of AUDI OF AMERICA, LLC

Both surfaces -arrows- must align.