Camshaft Timing Chain

Camshaft Timing Chain

Special tools, testers and auxiliary items required

• Locking Pin (T10060 A)

• Assembly Tool (T10352)

• Counter Hold Tool (T10355)

• Locking Pin (T40011)

• Torque Wrench (5-50 Nm) (V.A.G 1331)

Removing

- Remove the upper timing chain cover. Refer to => [ Upper Timing Chain Cover ] Upper Timing Chain Cover.

- Rotate the vibration damper to the Top Dead Center (TDC) position - arrow - using the counter hold tool (T10355) :






• The notch on the vibration damper must line up with the arrow mark on the lower timing chain cover.

• The marks - 1 - on the camshafts must point upward.

- Remove the lower timing chain cover. Refer to => [ Lower Timing Chain Cover ] Lower Timing Chain Cover.

The control valve has left hand threads.

- Remove the control valve in the - direction of the arrow - using the assembly tool (T10352).






- Remove the bolts - arrows - and remove the bearing bracket.






- Press the oil pump chain tensioner in the - direction of the arrow - and secure it with a locking pin (T40011).






- Remove the oil pump chain tensioner - 1 -.

- Remove the oil pump drive chain.

The locking wedge in the chain tensioner must be lifted in order to release the tension from the chain tensioner. Sand the end of the locking pin (T40011) down to a point. A screwdriver with a head approximately 1.5 mm wide can also be used.

There is a risk of damaging the chain tensioner. Proceed very carefully.

- Lift the chain tensioner locking wedge in the - direction of arrow 1 -, press the camshaft timing chain tensioning rail in the - direction of arrow 2 - and secure it with the locking pin (T40011).






- Remove the camshaft timing chain tensioning rail guide pin - 2 - and tensioning rail.






• The intake camshaft switches in engine rotation direction.

- Remove the camshaft timing chain guide rail guide pins - 1 - and guide rail.

- Remove the camshaft timing chain.

Installing

• The chain tensioner for the tensioning rail is installed and secured with the locking pin (T40011).

• The sprocket for the crankshaft is secured by the thrust piece (T10368).

• Tightening specification, refer to => [ Camshaft Timing Chain Overview ] Camshaft Timing Chain Overview.

• The following procedure must be performed in one step. A second technician is needed.

• The painted links of the timing chain must be positioned on the marks on the chain sprockets.

• Hold the wrench tight until the tensioning rail and guide rail is installed.

- Position the crankshaft to TDC, as shown in the illustration. It is in TDC when the marks on the balance shafts are aligned with the balance shaft bolts.






• The marks must match up wit the painted chain links each 16th turn.

- Mount the timing chain on the exhaust camshaft. Align the colored chain links with the marks.






- Mount the timing chain on the crankshaft. Align the colored chain link with the mark.

- Rotate the intake camshaft in the - direction of the arrow - with a wrench and mount the timing chain. Continue to hold the camshaft with the wrench.

- Install the camshaft timing chain tensioning rail and tighten the guide pin - 2 -.






- Install the camshaft timing chain guide rail and tighten the guide pins - 1 -.

- Position the bearing bracket and tighten the bolts - arrows - hand tight.






- Remove the locking pin (T40011) from the chain tensioner.

- Tighten the bearing bracket bolts - arrows - to specifications. Refer to => [ Camshaft Timing Chain Overview ] Camshaft Timing Chain Overview.

Further installation is in the reverse order of removal.