Ford FOTZ-6564-A Arm Assembly - Valve Rocker

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To have the valve covers taken off, you need to first undo the rocker arm fulcrum bolt and washer and the rocker arm. If only the pushrods are being removed, then the loosening of the fulcrum bolts is required and the rocker arms bound to be pushed to one side so that the location of the removal of pushrods can be accessed easily but the pushrods are organized in a particular fashion for reinserting them back a particular place in the car possibly with the help of a perforated cardboard box. The rocker armsshould also be checked for any signs of wear, craks and damage especially around the contact end with the pushrods and /or valve stems while ensuring the small hole on the poshrod end of the rocker should not be blocked. Look for signs of wear and galling of the fulcrum contact area; if there is any sign of wear or damage of any rocker arms replace them with the fulcrum seats. All the pushrods should be examined for cracks or worn areas and, although slightly more difficult, each pushrod should be rolled across a flat surface to ensure that it is straight. For fit-up, use engine oil or assembly lube to the top of the valve stem and in the pushrod guide, at the rocker arm fulcrum seat and socket. Place the pushrods after which the rocker arms, the fulcrums, and the fulcrum bolts come into play. Turn the crankshaft in order to bring the lifter down far as possible, then fasten the fulcrum bolts to the established extent of turn. Last of all, reinstall the valve covers and gaskets, crank up the engine, and, if there are any roughness or noise, you're done.

Before removing the valve cover(s), loosen the Rocker arm shaft support bolts, in a turn of turn basis beginning with the middle bolt in order not to stripped the head by the pull of valve spring when loosening the bolt by hand. Remove the rocker arm shaft assembly from the cylinder head and, then, visually differentiate each shaft assembly so that it could be fitted back into the same place. Then, take out the push rods and put them on a holder making sure you have arranged them in a manner that will allow for easy reinstallation. Remove the pins from the rocker arm assembly and lay the pieces on the workbench that they will not be mixed up. Check each rocker arm to see that it is not worn, cracked, or damaged especially at the ends where it bears on the push rods and valve stems: oil passages should be open. Measure the wear on the rocker arm bore combined with the rocker shaft worn position and replace the defective part. The push rods should be examined for cracks and signs of wear; the entire length of these should be rolled between two flat surfaces in order to identify bending. If this is so, the plugs which can be seen, protruding from the ends of the rocker shafts have to be removed and new ones inserted after the old ones have been knocked out. Rocker assembly can now be assembled and areas that have friction with engine assembly lube and new cotter pins are fastened at the ends of the rocker shaft with the oil hole facing downwards. Before final installation of the push rods, be sure to apply engine assembly lube on both ends of the rods, if the rods are original ones, you must place them back to their original positions. Grease the rocker arm pads and replace the rocker arm along with its positions on the notches on the shafts and the ball ends in the push rods . Torque the rocker shaft support bolts in a turning sequence from the center bolt to the outside in a two turn increments to the required torque and in the same manner that was followed to remove them.

Install the lash adjusters and, with the valve spring depressed, install each rocker arm.

Assemble the rocker assembly. Lubricate at friction points (pushrod ends, rocker arm bores, and ends) with engine assembly lube.

A special valve spring compressor made specifically for the SOHC engine.

Start the engine and check for roughness or noise.

Lift off the rocker arms, fulcrums, and fulcrum guides. Store them in the marked containers with the bolts (they must be reinstalled in their original locations).

Remove the pins and disassemble the rocker arm assembly, placing the parts in order on a clean workbench to avoid mixing them up.

The two methods are: 1. The manufacturer-recommended method, which uses a special valve spring compressor to remove the rocker arms without removing the camshaft(s). 2. An alternative method that requires the removal of the camshaft.