DISASSEMBLY AND ASSEMBLY OF SUBASSEMBLIES
Cylinder Head
Disassembly
1. Remove rocker arm bolt (6A527), rocker arm seat (6A528) and rocker arms (6564).
2. Clean carbon out of the cylinder head combustion chambers before removing the valves.
3. NOTE: Keep valves and springs together and store so each valve may be returned to its
respective guide.
Compress valve spring (6513) using Valve Spring Compressor T81P-6513-A. Remove valve spring
retainer key (6518) and release valve spring.
4. Remove valve spring retainer (6514), valve spring, valve stem seal (6571) and exhaust valve (6505)
or intake valve (6507). Discard valve stem seal. Identify all valve parts as to which cylinder they were
removed from and whether intake or exhaust. Repeat Steps 3 and 4 for the rest of the valves.
5. Clean, inspect and service the cylinder head (6049), as required, or prepare to transfer all usable
parts to a new cylinder head.
Assembly
All valves, valve stems and valve guides are to be lubricated with heavy oil SF. Apply Ford Multi-Purpose
Grease D0AZ-19584-AA or equivalent meeting Ford specification ESR-M1C159-A to the valve tips before
installation.
1. Install each exhaust valve or intake valve in the port from which it was removed or to which it was
fitted.
2. Install valve stem seal. Use a 5/8-inch deep-well socket and a light mallet or hammer to seat seal on
valve stem. Make sure intake seals and exhaust seals are on proper stem.
3. Install valve spring over exhaust valve or intake valve and then install valve spring retainer. Compress
valve spring and install valve spring retainer key.
4. CAUTION: Do not install valve spring spacers unless necessary. Use of spacers in
excess of recommendations will result in overstressing the valve springs and overloading the
camshaft lobes which could lead to spring breakage and/or worn camshaft lobes.
Measure the assembled height of the valve spring from the top of the spring seat to the underside of
the valve spring retainer with dividers. Check the dividers against a scale. If the assembled height is
greater than specification, install the necessary 0.030-inch thick spacer(s) between the cylinder head
spring pad and the valve spring to bring the assembled height to the recommended height.
5. Position rocker arms and rocker arm fulcrums on cylinder head and install rocker arm bolts. Do not
The bolts must be loose enough to allow the rocker arm to be rotated to the side.
Section 03-01B: Engine, 3.0L V-6 1997 Aerostar, Ranger Workshop Manual
file://C:\TSO\tsocache\VDTOM_5368\SVK~us~en~file=SVK31B44.HTM~gen~ref.HTM
To Next Page
Need help?
General
