Installing Camshaft Actuator

WARNING: This page is about a different variant/trim than selected.

NOTE: Timing not set correctly

Risk of engine damage
Rough running engine
Loss of engine power
→ Do not use force when fitting the staking tool.

→ Make sure that the gap is equal on both sides.

→ When inserting the staking tools, do not use force to turn the camshafts against any resistance.

→ The engine must be exactly at top dead centre.

→ The opposite cylinder must be at ignition TDC.

NOTE: Dirt and contamination

Risk of damage to units or components
→ Protect components from dirt and contamination.

→ Clean or replace dirty components.

Information

Camshaft actuator must not be disassembled!

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Friction plate in camshaft actuator

The camshaft actuator must never be disassembled.
To replace the friction plate -1- , lever it out carefully using a small slotted screwdriver -2- .

Fit new friction plates between the camshaft actuators and camshaft stub.
Install the timing chain.
1. 2.1 Fit timing chain on the camshaft actuators.

Fit camshaft actuator (cylinder bank 1).

3.1 Fit camshaft actuator with timing chain fitted and markings -1 and 2- aligned with the corresponding markings on the camshaft housing -Arrows- on the camshafts.

Check that the friction plates are fitted and seated correctly.

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Markings on camshaft actuator (cylinder bank 1)

Fit camshaft actuator (cylinder bank 2).

4.1 Fit camshaft actuator with timing chain fitted and markings -1 and 2- aligned with the corresponding markings on the camshaft housing -Lines- onto the camshafts.

Check that the friction plates are fitted and seated correctly.

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Markings on camshaft actuator (cylinder bank 2)

Replace O-rings -1- on the central valves -2- .
1. 5.1 Lever out old O-ring using a plastic wedge and dispose of it.
2. 5.2 Coat groove on central valve and new O-ring with oil.
3. 5.3 Carefully slide O-ring over the thread and shoulder -3- of the central valve and press it on using a plastic wedge.
4. 5.4 Do not use sharp-edged tools, such as a screwdriver. Never mask the thread with tape.
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O-ring on central valve
> T03006 - Locking pin-3- can now be removed from the chain tensioner -1- .

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Fixing device for chain tensioner

Information

You will need a second mechanic to help you with this step.
Tighten camshaft actuator -1- .
1. 7.1 A second mechanic must use > V.A.G 1331A - Torque wrench, 6-50 Nm/4.5-37 ftlb.-5- with > VAS 261 001 - Ring wrench insert, a/f 41-4- and > T90001 - counterhold tool-3- to pre-tension the outlet camshaft actuator -1- to 30 Nm (22 ftlb.) by turning it anti-clockwise and hold it securely.
2. 7.2 Tighten camshaft actuators -1 and 2- in the following sequence. (Camshaft actuator is still pre-tensioned)
  1. 7.2.1 Tighten intake camshaft actuator -2- to > Initial tightening 30 Nm (22 ftlb.) .
  2. 7.2.2 Tighten outlet camshaft actuator -1- to > Initial tightening 30 Nm (22 ftlb.) .
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Tightening camshaft actuator
Remove staking tools and turn the engine through two turns.
Check the timing again.
> WM, 150516 SETTING CAMSHAFT TIMING (V6 TURBO)
If the timing is OK:
Tighten camshaft actuator.
1. 10.1 > T90001 - Counterhold tool-3- and > T90002 - counterhold tool-4- must be fitted on the outlet camshaft actuator.
2. 10.2 > T90002 - Counterhold tool-4- must be supported on the intake camshaft actuator.
  Turn the crankshaft slightly to do this if necessary. (Only turn clockwise)
3. 10.3 Tighten outlet camshaft actuator -1- to > Final tightening + 35° .
4. 10.4 > T90001 - Counterhold tool-3- and > T90002 - counterhold tool-4- must be fitted on the intake camshaft actuator.
5. 10.5 > T90002 - Counterhold tool-4- must be supported on the outlet camshaft actuator -1- .
  Turn the crankshaft slightly to do this if necessary. (Only turn clockwise)
6. 10.6 Tighten intake camshaft actuator -2- to > Final tightening + 35° .
7. 10.7 > T90001 - Counterhold tool-3- and > T90002 - counterhold tool-4- must now be removed.
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Final tightening of camshaft actuator

Install screw plug for crankshaft.

11.1 Replace O-ring on screw plug for crankshaft.

11.2 Screw in and tighten screw plug for crankshaft.

> Tightening torque 25 Nm (18.4 ftlb.)

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Screw plug for crankshaft