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 limit position. Continue turning clockwise until the timing gear pulley marking is 1 1/2  cogs before the marking on the upper timing cover.

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

Check that the variable valve timing unit does not rotate when tightening. Install and tighten the center plug. See 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. Remove the upper timing belt cover.