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Valve Spring: Service and Repair

NOTE: Inspect valve components. Broken or damaged valve springs may be replaced without removing the cylinder head. If a valve or valve seat is damaged, it will be necessary to remove the cylinder head.

REMOVAL
1. Remove rocker arm cover.
2. Remove the applicable spark plug and bring the piston to the top of the bore to prevent accidental loss of the valve into the cylinder.

Rocker Arm Assembly:






3. Remove the valve rocker arm fulcrum bolts, fulcrum seats, valve rocker arms and push rods from the applicable cylinder.






4. Install an air line with an adapter in the spark plug hole and apply air pressure to the cylinder. Failure of the air pressure to hold the valve(s) in the closed position is an indication of valve seat damage and requires removal of the cylinder head.

Valve Assembly:






5. Install the fulcrum bolt and position the Valve Spring Compressor Tool T7OP-6049-A or equivalent. Compress the valve spring and remove the retainer locks, spring retainer, sleeve and valve spring.
6. If air pressure has forced the piston to the bottom of the cylinder, any removal 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 condition.

INSTALLATION
1. If the condition of the valve proved satisfactory, lubricate the valve stem with engine oil of quality recommended in the Owner's Manual. Hold the valve in the closed position and apply air pressure within the cylinder.
2. Place the spring in position over the valve and install the valve spring retainer and sleeve. Compress the valve spring and install the valve spring retainer locks. Remove the compressor tool and fulcrum bolt.
3. Lubricate the push rod ends with Ford Polyethylene Grease D0AZ-19584-A or equivalent, and install the push rod. Apply Ford Polyethylene Grease D0AZ-19584-A or equivalent to the tip of the valve stem.
4. Apply Ford Polyethylene Grease D0AZ-19584-A or equivalent to the rocker arms and fulcrum. Install the valve rocker arms, fulcrum and fulcrum bolts. Tighten to 25-33 Nm (18-25 ft lb).
5. Turn off the air and remove the air line and adapter. Install the spark plugs to cylinder head 14-20 Nm (10-15 ft lb) and connect the spark plug wires.
6. Clean and install the rocker arm cover bolts and tighten to 4-6 Nm (3-5 ft lb). Wait two minutes, then tighten bolts again to same specification.
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