Scion 13050-0T022 Gear Assembly, CAMSHAFT

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The intake camshaft sprocket actuator assembly has an inner hub attached to the camshaft, consisting of fixed vanes. Oil pressure acts as a wedge against these vanes, causing the camshaft to rotate. Higher oil pressure results in more rotation, advancing or retarding the camshaft.

To remove the camshaft sprockets, loosen the bolts while holding the lug on the camshaft with a wrench. Note the identification marks on the camshaft sprockets before removal, then remove the bolts. Pull on the sprockets by hand until they slip off the dowels. If necessary, use a small puller, with the legs inserted in the relief holes, to pull the sprockets off. Note: All models are equipped with variable valve timing, which consists of an actuator assembly attached to the intake camshaft sprocket. When removing the intake camshaft sprocket, only loosen and remove the center bolt, which fastens the sprocket to the camshaft. Do not loosen the outer four bolts that secure the actuator to the sprocket.