Cylinder Head Assembly: Adjustments

Valve Timing, Adjusting

Special tools, testers and auxiliary items required

• Torque wrench (5-50 Nm) (VAG 1331)

• Torque wrench (40-200 Nm) (VAG 1332)

• Locking pin (T03006)

• Multipoint socket (T10035)

• Counterhold tool (T10172)

• Camshaft clamp (T40070)

• 2 bolts M8 x 16

Modifying (T10172)





- Remove the (T10172/1) and install 2 M8 x 16 bolts - A -.

• The valve timing must be adjusted if the camshaft sprockets were loosened during repairs or if the valve timing is not set.

Securing the Camshafts if the Valve Timing is Correct

- Remove the chain compartment cover. Refer to => [ Chain Compartment Cover ] Service and Repair.

- Remove the cylinder head cover. Refer to => [ Cylinder Head Cover ] Service and Repair.

- Lock the crankshaft for adjusting the valve timing. Refer to => [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check/Adjust Valve Timing.

- Install the (T40070) as shown onto the camshafts and tighten the bolts to 20 Nm.





If the bolts could not be installed easily, attempt to rotate the exhaust camshaft at the recess using an open end wrench - A - (18 or 19 millimeter (mm), depending on the wrench width) slightly in the - direction of the arrow - in order to eliminate any play in the chain drive.

- Relieve the tension on the timing chain. To do so, insert a screwdriver of the appropriate size between the timing chain tensioner piston and the tensioning rail and press the piston in - direction of the arrow -.





- Secure the completely pressed in piston using (T03006). The (T03006) must be installed until it stops.

Securing the Camshafts if the Valve Timing is Not Correct

- Remove the chain compartment cover. Refer to => [ Chain Compartment Cover ] Service and Repair.

- Rotate the crankshaft to Top Dead Center (TDC) for cylinder 5, refer to => [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check/Adjust Valve Timing, however do not peg the crankshaft using (T40069).

- Rotate the crankshaft so that (T40070) can be installed easily onto the camshafts as shown.





- Tighten the bolts for the (T40070) to 20 Nm.

Removing the Camshaft Sprocket/Actuator

- Relieve the tension on the timing chain. To do so, insert a screwdriver of the appropriate size between the timing chain tensioner piston and tensioning rail and press in - direction of the arrow -.





- Secure the completely pressed in piston using (T03006). The (T03006) must be inserted until it stops.

- Remove the bolts - 1 and 4 - using (T10035 ) and remove the actuator - 2 - and sprocket - 3 -.

If necessary, the sprocket - 3 - must be pried off slightly using a screwdriver.

• Lock the crankshaft, refer to => [ Crankshaft, Locking ] Crankshaft, Locking, if not yet secured. Crankshaft must only be rotated slightly around the TDC point for this. Otherwise there is a risk the valves rest on the pistons.

Valve Timing, Adjusting

• Crankshaft secured by the (T40069)

• Camshafts secured by the (T40070)

• Chain tensioner is tensioned

- Place the actuator - 2 - and sprocket - 3 - into the timing chain, place them onto the camshafts and hand tighten the new bolts - 1 and 4 -.





Sprockets must still be able to be rotated, however they must not tilt.

• Make sure that the timing chain lies correctly in the guide and tensioning rails.

- Relieve the tension on the chain tensioner by pressing in the piston and pulling out the (T03006).

- Install the modified (T10172) to the exhaust camshaft sprocket - 4 -.





• A second mechanic is required for the following steps.

- Hold the timing chain at preload by pressing the (T10172 ) in the - direction of the arrow -.

- Simultaneously tighten the camshaft actuator bolt - 2 - first and then the exhaust camshaft sprocket bolt - 3 - to 60 Nm.

Then tighten the bolts - 2 and 3 - and additional 90° (1/4) further.

• When applying the additional torque of 90°, the timing chain must no longer be held at preload.

- Remove the (T40070).





- Remove the (T40069).





- Turn the crankshaft 2 revolutions in the engine running direction and lock the crankshaft => [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check/Adjust Valve Timing.

- Check the valve timing. Refer to => [ Valve Timing, Checking ] Testing and Inspection.

If the valve timing is not correct:

- Loosen the sprocket/actuator bolts again and adjust the valve timing again (replace the camshaft bolts).

The rest of the installation follows the reverse of the removal procedures. When doing this note the following:

• Remove the (T40069) from the cylinder block and install the locking bolt.

• Fill with coolant. Refer to => [ Draining and Filling ] Draining and Filling.