Impreza WRX STI F4-2.5L Turbo (2008)
4) Install the belt idlers.
TIMING BELT
1) Prepare for installation of the automatic belt tension adjuster assembly.
2) Align the mark (A) on crank sprocket with the mark on oil pump cover at cylinder block.
3) Align the single line mark (A) on the exhaust cam sprocket RH with notch (B) on the timing belt cover.