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Saturday, November 9, 2013

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How to Remove Roller Lifters

Engines are equipped with one of two types of cameras and lifters. A standard cam uses a cylindrical lifter that is flat on the end. They slide into the lifter bore and operate independently of other lifters. On the other hand, roller cams, which are used in high-performance engines, use roller lifters in pairs, connected by a tie. While a conventional lifter rotates in the bore, roller cams are held in place by a tie bar because if they rotate the roller on the bottom of the lifter would not stay in contact with the cam, causing catastrophic engine problems. The only difference in removing conventional lifters and roller lifters is the roller lifters come out in pairs.

Instructions

    1

    Disconnect all carburetor linkages electrical wires and vacuum hoses from the intake manifold. Loosen and remove the bolts that connect the intake manifold to the cylinder heads, using any wrenches necessary for the job from a toolkit. Remove the intake manifold from the engine.

    2

    Loosen and remove the bolts that hold the valve cover to the cylinder head. Remove the valve cover. If the valve cover seems to be stuck on the cylinder head, tap It lightly with a ball peen hammer from the toolkit.

    3

    Loosen the rocker arm nuts, but do not remove them. Loosen them only enough to turn them far enough sideways to remove the push rods. Remove the push rods.

    4

    Grasp the tie bar that connects the intake and exhaust lifters, and pull it up at the same angle that the lifters operate to remove the lifters.

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