Saturday, November 9, 2013
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.
2Loosen 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.
3Loosen 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.
4Grasp 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.
Sunday, October 20, 2013
How to Set Up a Roller Cam Thrust Button
Aluminum roller cams help maintain the precision of your automobiles engine. When they are disturbed, they can move the distributor of the vehicle, retarding the timing of the engine and the revolutions per minute -- or rpm. Set up a roller cam thrust button to resolve this problem.
Instructions
- 1
Find the threaded hole in the front of the camshaft -- the long metal bar with circular metal plates wrapped around the axis.
2Place the roller cam button directly above the threaded hole between the timing cover. Insert the screws through to the camshaft, and twist the screws in firmly with the screwdriver.
3Apply auto lubrication to the ball bearings on the roller cam, to assure smooth rolling. The cam will perform by rolling smoothly as the engine completes high performance operations. As the camshaft shifts, the roller cam will balance it back to increase engine precision.
