Removal and installation valves (OHC engine) (Scorpio 2)

Note: If the valve drive parts are to be reused, they must be installed in their original locations. To avoid confusing the parts, it is recommended to prepare a suitable laying board.

Removal

Remove the cylinder head and place it on 2 wooden blocks to avoid accidentally damaging the open valves, see p. 15.



Unfasten the retaining springs of the pressure levers from the clamps on the spherical pins and remove them.



Pull the pressure levers away from the camshaft. To do this, turn the camshaft so that the spring of the corresponding valve is unloaded. Insert the FORD 21-005B device between the camshaft and the upper valve spring plate and recess the plate so that the pressure lever can be pulled out. If there is no device for compressing the springs, the valve spring can be carefully compressed with a screwdriver.





Using the FORD 21-0050 tool, press the valve spring plate down and remove the crackers from the valve groove. To prevent the valve from moving down when removing the crackers, place a wooden block in the combustion chamber of the cylinder head.

Caution: When removing the valve crackers, do not damage the valve stem. If the stem is damaged, the valve must be replaced.

Release the valve spring, remove the spring plate and valve spring. Remove all valves in a similar manner.

Remove the valve from the cylinder head, remove the oil seal, see next chapter.

Installation

If the old valves and the old cylinder head are installed, the valve guides must be checked before assembly. If new valves are installed in the old cylinder head, the valve seats in the cylinder head must first be reworked and the valves must be ground in.

Clean the valves from any carbon deposits using a scraper and wire brush. Clean the valve stems from burrs at the surfaces where the crackers meet.

The valve stems and valve guides are easily lubricated with SAE 80/90 hypoid oil (gear oil) and the valves inserted.

Use new valve stem seals, see next chapter.



Install the spring and upper spring plate onto the valve.

Use the special FORD 21-005B tool to compress the valve springs, insert the crackers correctly, and then release the springs.

Caution: Do not confuse the inlet and outlet valves.

Lubricate the spherical pins with SAE 80/90 hypoid oil and insert the pressure levers. First turn the camshaft so that the corresponding cam points upwards.

Secure the pressure levers with retaining springs.

Adjust the valve clearances, see p. 26.

Install the cylinder head, see p. 15.

This publication was borrowed from the website: fordbook