Valve Spring, Retainer and Valve Stem Seal

Broken valve springs (6513) or worn or damaged valve stem seals (6571) and valve spring retainer (6514) may be replaced without removing the cylinder head providing damage to the valves or valve seats has not occurred.

SPECIAL SERVICE TOOL(S) REQUIRED

Description	Tool Number
Valve Spring Compressor	T70P-6049-A
Valve Stem Seal Replacer	T87L-6571-BH

Removal

1. NOTE: In-vehicle removal and installation procedures apply to both intake valves (6507) and exhaust valves (6505).

   Remove the valve cover (6582). (Refer to Valve Cover and Gasket in the In-Vehicle Service portion of this section.) Remove the applicable spark plug (12405).

2. Crank the engine (6007) until the applicable piston is on TDC at the end of the compression stroke.

3. Install a suitable valve holdup air adapter in the spark plug hole and connect the air line.

   

4. NOTE: If air pressure fails to hold the intake valve in the closed position during this operation, it can be presumed that the intake valve is not seating or is damaged. If this condition occurs, remove the cylinder head (6049) for further inspection.

   Remove the push rod (6565). Place a block of wood on the top edge of valve spring retainer and tap moderately with a hammer to unlock valve spring retainer keys (6518). Install the bolt and position Valve Spring Compressor T70P-6049-A as shown in the previous illustration. Compress the valve spring and remove the valve spring retainer keys, valve spring retainer and valve spring. Remove and discard the valve stem seal.

   

5. If air pressure has forced the piston assembly to the bottom of the cylinder, any removal of air pressure will allow the intake valve to fall into the cylinder. A rubber band, tape or string wrapped around the end of the valve stem will prevent this condition and will still allow enough travel to check the intake valve for binds.

6. Inspect the intake valve stem for damage. Rotate the valve and check the valve stem tip for eccentric movement during rotation. Move the intake valve up and down through normal travel in the valve guide and check the stem for binds. If the intake valve has been damaged, remove and replace the cylinder head and valve. Refer to Cylinder Head in the In-Vehicle Service portion of this section.

7. If the condition of the intake valve proved satisfactory, hold the intake valve in the closed position and apply air pressure within the cylinder.

Installation

1. Install new valve stem seal. Use Valve Stem Seal Replacer T87L-6571-BH. Place the valve spring in position over the intake valve and install the valve spring retainer. Compress the valve spring and install the valve spring retainer keys. Remove the compressor tool.

2. Apply Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specifications ESB-M1C93-B and ESR-M1C159-A to both ends of the push rod. Install the push rod. Apply Multi-Purpose Grease D0AZ-19584-AA or equivalent meeting Ford specifications ESB-M1C93-B and ESR-M1C159-A to the top of the valve stem.

3. Turn off the air and remove the air line and adapter. Install the spark plug and connect the distributor to spark plug wire.

4. Replace the valve cover.