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These Dorman camshaft phasers are specially designed, computer-controlled cam gears that have the ability to adjust camshaft position (centerline-advance or retard) while the engine is running. They are used on all 2005 and later Ford 3-valve modular engines. Since the modular 3-valve engine uses two camshafts, two camshaft phasers are required per engine. Engine oil is pressure-fed through a series of passageways in the cylinder heads and camshafts, and then out into the cam phasers. The engine computer controls a pair of solenoids that adjust this oil flow through a series of chambers inside of the cam phasers. Located inside these chambers are vanes, attached to a free-floating central hub. The hubs are directly attached to the camshafts, and as oil is allowed into and out of these chambers, the position of the cam can be retarded up to 60 crankshaft degrees.
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Camshaft Phaser, Steel, Ford, Lincoln, Mercury, 4.6, 5.4L, Each
Part Number: RNB-917-250
Estimated Ship Date: Tomorrow
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