Variable Valve Timing Actuator: Service and Repair

Camshaft Adjuster

Removing

• Camshafts and crankshaft must not be rotated when timing drive is disassembled.

• The camshaft bar (T10068) serves exclusively to lock the camshaft at TDC. To counter-hold, a 32 mm open-end wrench must be set on the hex of the camshaft.

• Engine removed.

• Engine separated from transmission.

- Remove timing chains for camshafts => [ Timing Chains for Camshaft Drive ] Timing Chains For Camshaft Drive.

- To loosen the bolt for camshaft adjuster counter-hold at hex - arrow - of camshaft with a 32 mm open-end wrench.





- Remove camshaft adjuster.

Installing

• There must be no oil on the contact surfaces between camshaft adjuster and camshaft as well as between bolt head and camshaft adjusters.

• Observe alignment pin in camshaft adjuster.

• Use new bolts when securing the camshaft adjuster.

- When installing, observe the identification of the camshaft adjuster - arrows -





• Intake camshaft timing adjuster for cylinder bank 1 (right): B1 / A2

• Exhaust camshaft timing adjuster for cylinder bank 1 (right): B1 / Front side made of plastic

• Intake camshaft timing adjuster for cylinder bank 2 (left): B2 / A2

• Exhaust camshaft timing adjuster for cylinder bank 2 (left): B2 / Front side made of plastic

• The camshaft bar (T10068) serves exclusively to lock the camshaft at TDC. To counter-hold, an open-end wrench 32 mm must be set on the hex of the camshaft.

• There must be no oil on the contact surfaces between camshaft adjuster and camshaft as well as between bolt head and camshaft adjuster

- To tighten the bolt for camshaft adjuster counter-hold at hex - arrow - of camshaft with an open-end wrench.





- Install timing chains for camshafts => [ Timing Chains for Camshaft Drive ] Timing Chains For Camshaft Drive.

Tightening Specifications





* 90° corresponds to one quarter rotation.

* Replace bolts.