Valve Spring: Service and Repair

REMOVAL
1. Remove the valve cover.
2. Remove the applicable spark plug. Make sure the applicable piston is at the top of its stroke with all four valves closed.
3. Install the air line with an adapter in the spark plug hole and turn on the air supply.

NOTE: If the air pressure fails to hold the valves closed while performing the following steps, valve or valve seat damage is indicated and the cylinder head must be removed.

4. Remove the camshafts and tappets as required.

NOTE: If removal is required, mark the position of the valve tappets for installation in their original positions.

5. Install the Valve Spring Compressor Set Pivot Bar and Valve Spring Compressor Adapter. Compress the valve spring. Remove the valve spring retainer and valve spring.
6. Inspect the valve spring, valve spring retainer and valve spring retainer key. Replace worn or damaged parts as required.
7. Use the Valve Stem Seal Remover and Slide Hammer, remove the valve stem seal.

NOTE: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve(s) to fall into the cylinder. A rubber band, tape or string wrapped around the end of the valve stem will prevent this from happening.

INSTALLATION
1. Remove air pressure from the spark plug adapter, inspect the valve for damage. Rotate the valve and check the valve for eccentric movement during rotation.

CAUTION: If the valve has been damaged, removal will be required for repair.

2. If the condition of the valve is satisfactory, apply Engine Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A to the valve stem and hold the valve closed. Apply the air pressure within the cylinder.
3. Lubricate valve and guides with Engine Assembly Lubricant D9AZ-19579-D or equivalent meeting Ford specification ESR-M99C80-A and using Valve Stem Seal Replacer install the valve stem seals onto the cylinder head valve guides.
4. Place the valve spring in position over the valve and install the valve spring retainer.
5. Compress the valve spring using Pivot Bar from Valve Spring Compressor Set, Valve Spring Compressor Pivot Set and Valve Spring Compressor Adapter and install the valve spring retainer keys. Remove the valve spring compressor tools.
6. Remove the air pressure.
7. Remove the air line adapter.
8. Install the spark plug.
9. Install the valve tappet, valve tappet shim and camshaft.
10. Install the valve cover.