Ford F8AZ-6564-AA Arm Assembly - Valve Rocker

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Detach the valve cover(s) from the cylinder head(s). Starting at the front of one cylinder head, remove the rocker arm fulcrum bolts, which may not need to be completely removed in all cases; loosen them several turns to see if the rocker arms can be pivoted out of the way for pushrod removal. Store the bolts separately in marked containers to ensure they are reinstalled in their original locations. If only the pushrods are being removed, loosen each bolt just enough to allow the rocker arms to be rotated to the side for pushrod extraction. Lift off the rocker arms and fulcrums, storing them in marked containers with the bolts for proper reinstallation. Remove the pushrods and store them separately to avoid mixing during installation, using a perforated cardboard box for organization and labeling the front of the engine. Check each rocker arm for wear, cracks, and other damage, particularly at the contact points with the pushrods and valve stems. Ensure the hole at the pushrod end of each rocker arm is clear. Inspect the pivot area and fulcrum for wear, cracks, and galling; replace any worn or damaged rocker arms and fulcrums with new ones. Examine the pushrods for cracks and excessive wear at the ends, rolling each across a piece of plate glass to check for bending. Lubricate the lower end of each pushrod with clean engine oil or moly-base grease and install them in their original locations, ensuring each pushrod seats completely in the lifter. Apply moly-base grease to the ends of the valve stems and the upper ends of the pushrods before positioning the rocker arms and fulcrums. Grease the fulcrums to protect the mating surfaces prior to engine oil pressure buildup, then set the rocker arms and guides in place, installing the fulcrums and bolts, and tightening the rocker arm bolts to specifications. Finally, install the valve covers, completing the installation in reverse order of removal.

Detach the valve cover(s) from the cylinder head(s). Starting at the front of one cylinder head, remove the rocker arm fulcrum bolts, which may not need to be completely removed in all cases; loosen them several turns to see if the rocker arms can be pivoted out of the way for pushrod removal. Store the bolts separately in marked containers to ensure they are reinstalled in their original locations. If only the pushrods are being removed, loosen each bolt just enough to allow the rocker arms to be rotated to the side for pushrod extraction. Lift off the rocker arms and fulcrums, storing them in marked containers with the bolts for proper reinstallation. Remove the pushrods and store them separately to avoid mixing during installation, using a perforated cardboard box for organization and labeling the front of the engine. Check each rocker arm for wear, cracks, and other damage, particularly at the contact points with the pushrods and valve stems. Ensure the hole at the pushrod end of each rocker arm is clear. Inspect the pivot area and fulcrum for wear, cracks, and galling; replace any worn or damaged rocker arms and fulcrums with new ones. Examine the pushrods for cracks and excessive wear at the ends, rolling each across a piece of plate glass to check for bending. Lubricate the lower end of each pushrod with clean engine oil or moly-base grease and install them in their original locations, ensuring each pushrod seats completely in the lifter. Apply moly-base grease to the ends of the valve stems and the upper ends of the pushrods before positioning the rocker arms and fulcrums. Grease the fulcrums to protect the mating surfaces prior to engine oil pressure buildup, then set the rocker arms and guides in place, installing the fulcrums and bolts, and tightening the rocker arm bolts to specifications. Finally, install the valve covers, completing the installation in reverse order of removal.

These engines are difficult to work on and require special tools for many procedures. On any procedure involving timing chain, camshaft, or cylinder head removal, the steps must be read carefully and disassembly must proceed using the special tools; otherwise, damage to the engine could result.

After replacing the adjusters, the engine may make some tapping noises until all the air is bled from the lash adjusters. To help, raise the engine speed from idle to 3,000 rpm for one minute after warming up the engine. The noise should be gone upon the next restart.

Apply moly-base grease to prevent damage to mating surfaces.

Apply moly-base grease to the ends of the valve stems and the upper ends of the pushrods before positioning the rocker arms, fulcrums, and guides.

Using a lifter bleed-down tool, press on the rocker arm until the lifter leaks down. Check the clearance between the valve stem and rocker arm with a feeler gauge. Compare the results to the Specifications and write it down for future reference.

Inspect each rocker arm for wear, cracks, and other damage, especially at the friction surfaces where the pushrods and the valve stems contact the rocker arm tips. If a rocker arm is worn or damaged, replace it.

The valve spring compressor uses the camshaft as a pivot point to push down on the spring, releasing tension on the cam follower. The valve spring spacer prevents the spring from collapsing too far and damaging the valve stem seal.

Inspect the pushrods for cracks and excessive wear at the ends. Roll each pushrod across a piece of plate glass to check for bending; if it wobbles, it's bent.