Exhaust Camshaft

Courtesy of VOLVO CARS CORPORATION

At the rear end of the camshaft there is a cam wheel that drives the high pressure fuel pump. There is a milled groove at the far end. The groove is not only used to reset the camshafts with a tool, it is also intended to drive the vacuum pump.

Courtesy of VOLVO CARS CORPORATION

The groove is hardened, which makes it very important not to use the reset tool as a counterhold when torque tightening the VVT unit. Instead always use counterhold tool 999 7497 when tightening.