SECTION C3
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VALVE REMOVAL AND REASSEMBLY
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The valves need to be removed during
decarbonising (as described in Section C4) or when
changing valve springs or inlet guide to stem
seals. Removal of the cylinder head (Section C1 )
and inlet rocker cover stud is necessary to gain
access to the valves.
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Proceed as follows:
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1
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Using a suitable overhead valve spring
compressor, (proprietary spring compressors are
readily available) place the fixed jaw against the
valve head and the movable jaw against the valve
collar. Tighten down the movable jaw to compress
the valve spring and remove the split collets.
Collet removal may be facilitated by the use of a
small screwdriver or long nose pliers.
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2
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Release the pressure from the compressor and
collect the valve, springs, collars and where
necessary, the inlet guide seals.
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3
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As each valve is removed, mark it in some way so
that it can be replaced in the original position.
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4
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Examine the valves for burning or damage and
grind in the cleaned up or new valves as described
in Section Ci. The seats shouid not need to be
recut unless new valve guides have been fitted.
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5
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Check the valve springs for collapse. This can
most easily be done by comparison with new springs
or by checking free length to the dimension given
in Technical Data.
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6
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Clean all parts very thoroughly in gasoline
(petrol) and allow to dry.
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7
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Ensure that heat insulators are fitted between
the exhaust valve spring seat and cylinder head on
all engines and that insulators are also fitted at
the inlet positions on pre 1972 cylinder heads.
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