Remove the valve covers (6582). Refer to Valve Cover and Gasket in the In-Vehicle Service portion of this section. Loosen the rocker arm seat bolts and turn rocker arms to one side.
Section 03-01C: Engine, 7.5L MFI | 1996 F-250, F-350, F-Super Duty Chassis Cab and Motorhome Workshop Manual |
The following procedure is applicable for removing one or all of the valve tappets (6500). Before replacing a hydraulic valve tappet for noisy operation, make sure the noise is not caused by improper valve clearance or by worn rocker arms (6564) and/or push rods (6565).
Removal
Remove upper intake manifold (9424) and throttle body (9E926). Refer to Intake Manifold, Upper, in the In-Vehicle Service portion of this section.
Remove the valve covers (6582). Refer to Valve Cover and Gasket in the In-Vehicle Service portion of this section. Loosen the rocker arm seat bolts and turn rocker arms to one side.
Remove the push rods. Keep push rods in sequence so they can be installed in their original locations.
Remove the valve tappets with a magnet. Place them in a rack in sequence. Rotate valve tappets back and forth to loosen them from gum or varnish deposits.
Refer to Section 03-00 for cleaning, inspection and testing procedures. If necessary to disassemble valve tappet, refer to Valve Tappet, Hydraulic, under Subassemblies in the Disassembly and Assembly portion of this section.
Installation
Clean the outside of valve tappets. Valve tappets and bores are to be lubricated with recommended engine oil before installation. Install the valve tappets into their original bores. Check any new valve tappet for free fit in bore to which it is to be installed. Prior to installation of a new valve tappet, make sure valve tappet is full of oil by working the valve tappet plunger up and down until the valve tappet fills with fluid and all traces of air bubbles has disappeared.
Install push rods in original positions. Apply Ford Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specification ESB-M1C93-B to valve stem tips and push rod ends.
Position the rocker arms over the push rods. Tighten the rocker arm seat bolts. Refer to Rocker Arm in the In-Vehicle Service portion of this section.
Install valve covers. Refer to Valve Cover and Gasket in the In-Vehicle Service portion of this section.
Install upper intake manifold andthrottle body. Refer to Intake Manifold, Upper, in the In-Vehicle Service portion of this section.