B
ENGINE
Fig. B13.
Cylinder
head
bolt
tightening
sequence
When
re-assembllng the pipes make
SUre
that
the
Similarly, make
sure
that
the
pipe clips
at
the
finned clips on
the
oUter pipes and
the
tie-bolt
for
collector
box
are
tight. Refit
the
carburetor
and
the
Inner
pipes
Is
securely tightened.
air
cleaner
assembly (Section
B6
and
BB).
SECTION
BI3
REMOVING
AND
REFITTING
THE
VALVES
/
/
/""
'>
/
~/
"
Fig.
B15.
Valve components
Fitting a new
or
reground valve necessitates seating
by
the
grinding
In
process described
in
Section
B16,
but
It does not necessitate recuttIng
the
cylinder
head valve seat unless new valve guides have been
fitted.
Removal
of
the
valves
Is
facilitated
by
means
of
a
"G"
clamp
type
valve spring
compressor,
see
Fig.
B14.
When
the
spring
Is
compressed suffic'lently,
the
spilt
cotters
can
be
removed With a
narrow
screwdriver.
and
the
valve spring
withdrawn
when
the
compressor
Is
released. It may assist
In
releasing
the
cotters
If
the
tool
Is
given a sharp blow
with
a
hammer.
near
to
the
end
of the
valve
stem, after
the
spring has been compressed slightly.
Fig. 814. Removing
the
valves
B1B
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