Installing the variable valve timing (VVT) unit on the intake camshaft

Fig 1: Identifying Timing Gear Markings

Courtesy of VOLVO CARS OF NORTH AMERICA.

Slacken off, but do not remove the screws which secure the timing gear pulley to the VVT unit.

Press the variable valve timing unit / timing gear onto the camshaft.

Install the center screw which secures the variable valve timing unit to the camshaft. Tighten slightly.

Turn the variable valve timing unit counter-clockwise as far as it will go.

Remove the center screw.

Position the upper timing cover.

Turn the timing gear pulley clockwise until the screws at the oval holes are in the end-position. Continue turning clockwise until the timing gear pulley marking is 1 1/2 teeth before the marking on the upper timing gear casing.

NOTE:

Do not turn counter-clockwise during this procedure.

Fig 2: Identifying Timing Gear Pulley & Upper Timing Cover Markings Aligned

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check that the timing gear pulley is still in its end-position at the oval holes.

Tighten the center screw in the VVT unit. See Summary of specific components and tightening torques .

Check that the VVT-unit does not rotate when tightening.

Install and tighten the center plug according to Summary of specific components and tightening torques .

Turn the variable valve timing unit clockwise to the limit position.

Turn the timing gear pulley so that the markings correspond.