The Ford F-250 Pushrod is essentially a link that turns the motion of the camshaft into the motion of the valves, keeping the combustion chamber sealed up so that there is maximum power produced. Many Ford trucks use the conventional overhead valve arrangement where the cam is fixed low in the block, and the lifters ride along its lobes. The Pushrod rises through the head, and a rocker arm pivots to either open or close the intake and exhaust valves to let in the fresh charge and expel burnt gases. The Pushrod was a basic steel piece that remained in all F-250 generations with variations in length and wall thickness to match the various displacement changes. The later overhead cam versions of the F-250 dispensed with the Pushrod by relocating the camshafts above the valves. The main value of the original Ford design is durability and serviceability. However, excessive lash or valve-to-piston contact can cause a Pushrod to bend. This can cause a ticking noise, misfire, and power loss until the damaged rod is replaced. Appropriate spring pressure and well-lubricated Pushrod surfaces along with tight clearances hold the Ford valvetrain intact under the heavy tasks a F-250 regularly does.
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