Valve Spring: Service and Repair

REMOVAL
1. Remove the rocker arm of the valve to be repaired.





2. Position the piston at Top Dead Center (TDC).
3. Remove the spark plug and install compressed air in the cylinder to hold both valves in position.

CAUTION: If air pressure has forced the piston to the bottom of the cylinder, any loss of air pressure will allow the valve to fall into the cylinder. If air pressure must be removed, support the valve prior to spring removal.





4. Use a suitable valve spring compressor on the valve spring to be removed. Compress the valve spring and remove the valve spring retainer key.

NOTE: Mark the location of the parts so they can be installed in their original positions.





5. Remove the valve springs.
1 Remove the valve spring rotator (exhaust).
2 Remove the valve spring retainer sleeve (intake).
3 Remove the valve spring retainer (intake).
4 Remove the valve springs.

6. Check the valves and valve springs.

INSTALLATION
1. Lubricate the valve stem.
- Use Super Premium SAE 5W30 Motor Oil XO-5W30-QSP or equivalent meeting Ford specification WSS-M2C153-G.





2. Install the valve springs.
1 Install the valve springs.
2 Install the valve spring retainer (intake).
3 Install the valve spring retainer sleeve (intake).
4 Install the valve spring rotator (exhaust).





3. Use a suitable valve spring compressor on the valve spring to be installed. Compress the valve spring and install the valve spring retainer keys.
4. Remove the compressed air line and install the spark plug.
5. Install the rocker arm.