Installing the Variable Valve Timing Unit On the Camshaft

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

Courtesy of VOLVO CARS OF NORTH AMERICA.

Press the variable valve timing unit/timing gear pulley onto the camshaft. Install the center screw (1) that holds the variable valve timing unit to the camshaft. Do not tighten yet  .

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

Position the upper timing cover.

Fig 2: Identifying Timing Gear Pulley Marking Offset

Courtesy of VOLVO CARS OF NORTH AMERICA.

Turn the timing gear pulley so that the screws at the oval holes are in the limit position. Continue turning clockwise until the timing gear pulley's marking is 1 tooth before the marking on the upper timing cover.

Fig 3: Identifying Variable Valve Timing Unit Center Screws And Timing Gear Pulley

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 (1)  in the VVT unit to 120 Nm  .

Check that the variable valve timing unit does not rotate when tightening. Install the center plug and tighten to 35 Nm  .

Install the belt pulley on the exhaust camshaft:  Install the belt pulley on the intake camshaft with three screws; do not tighten yet  .

Check that the markings on the belt pulley and the upper timing cover align.