CYLINDER HEAD—E.2
Fig. E.1.
Removing an Atomiser.
To Remove the Valves
Originally, all valves were numbered 1.1, 2.2, 3.3, and
4.4 with a corresponding number adjacent to each valve
face (see Fig. E.31. This practice has now ceased and
where these valves are to be used again. then they
should be suitably marked to ensure that they are
replaced in their respective positions.
1.
Place the cylinder head on the bench with the
gasket face downwards.
2.
Compress the spring caps and springs with a
suitable valve spring compressor as shown
Fig. E.2.
Removing the Rocker Shaft Assembly.
1. Rocker Shaft Bracket.
2. Rocker Lever.
3. Oil Feed Connection.
in Fig. E.4 and remove the two half conical collets
from each valve.
3.
Remove the spring caps, springs and rubber oil
deflectors from the valve stems, thus liberating the
valves which can be taken out when the cylinder
head is turned over.
Cleaning
It is essential that absolute cleanliness is observed
during the following instructions to prevent the possibility
of damage resulting from particles of hard carbon falling
into the engine, thereby causing damage to cylinder
liners, pistons and bearings, etc.
1.
Carefully remove all traces of carbon from the
cylinder head taking care not to scratch or burr the
machined faces.
2.
If the water jacket of the cylinder head shows signs
of excessive scale, a proprietary brand of descaling
solution should be used.
3.
Blank off the rocker oil feed oil-way between
numbers 2 and 3 cylinders to prevent the ingress of
carbon particles and carefully remove the carbon
from the pistons and cylinder block face again
taking care not to scratch or burr the machined
surfaces.
4.
After valve seat machining and valve grinding
operations have been carried out, all parts should
be thoroughly washed in a suitable cleaning fluid.
Fig. E.3.
Numbering of Valves
