Installing The Variable Valve Timing (VVT) Unit On The Camshaft

Fig 1: Variable Valve Timing Unit Center Screw And Timing Gear Pulley To Variable Valve Timing Unit Screws

Courtesy of VOLVO CARS OF NORTH AMERICA.

Push on the variable valve timing unit/timing gear pulley on the camshaft.

Install the center screw (1) which secures the variable valve timing unit to the camshaft.

Tighten the screw slightly.

Slacken off, but do not remove the screws (2) which secure the timing gear pulley to the variable valve timing unit.

Turn the timing gear pulley until the screws at the oval holes are in the center position. Tighten the screws (2) slightly.

Turn the variable valve timing unit clockwise  to its limit position so that the unit is in its end position. Install the upper timing cover.

Slacken off the center screw and continue turning clockwise  until the timing gear pulley marking aligns with the marking on the upper timing cover.

Tighten the center screw in the variable valve timing unit. Tighten. See: Summary of tightening torques for specific components .