Impreza GT F4-2.5L Turbo (2009)
4) Align the single line mark (B) on the intake cam sprocket RH with notch (A) on the timing belt cover. Make sure that the double line marks (C) on
intake and exhaust cam sprockets are aligned.
5) Align the single line mark (B) on exhaust cam sprocket LH with notch (A) on the timing belt cover by turning the sprocket counterclockwise (as
viewed from front of engine).
6) Align the single line mark (B) on intake cam sprocket LH with notch (A) on the timing belt cover by turning the sprocket clockwise (as viewed
from front of engine). Make sure the double line marks (C) on the intake and exhaust cam sprockets are aligned.
7) Make sure that the cam and crank sprockets are positioned properly.
CAUTION:
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Intake and exhaust camshafts for this DOHC engine can be independently rotated with the timing belts removed. As can be seen from the
figure, if the intake and exhaust valves are lifted simultaneously, the valve heads will interfere with each other, resulting in bent valves.
