Toyota 13050-21050 Gear Assy, Camshaft Timing

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Once the VVT oil control valve is actuated by the PCM, it directs a specified amount of oil pressure from the engine to either advance or retard the intake camshaft sprocket actuator assembly.

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.