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SVO 2818
SVO 2819
Fig.
2-21.
Replacing the valve guides
A=
17.5
mm
(.689")
Assembling
VOLVO
10327
1
l
.
Check
that the parts
are
in
good cond
ition
and
clean. Test the
springs
to
e nsure
that they main
-
talin the vallues
given
in the
"Specifications".
2.
P.1'
a
,ce
the va·lves in
position. Fit the
valve guide
sea,l,
spring,
washer
and collet.
Replacing the rocker arm bushes and
grinding the rocker arms
l.
If wea,r amounts to .1 mm
(.004"),
-rep1
lace the
rocker arm bush. Use tool
SYO
1867 for pressing
the bush out and in, see Fig. 2-23. Then ream the
bush with a
suitable
reamer until an accurate fit
on the shaft is obtai'ned.
The
hol
e
in the bush
shoul,d coinoilde with the hole in
the rocker
arm.
2. If necessory, g,rind
the pressure
pad of the rocker
arm in
a
spe6a,I machine.
Adiusting
the valve clearance
The va'lve clearance can be
adjusted satisfactorily
with the eng,ine
stationary,
irrespective of whether the
en9'ine
is
cold
or warm
.
T,he cleamnce is
the same
for
both
the
inlet
and exhaust
valve.
When adjusting,
use
two feelergauges,
one
"Go"
.50
mm
(.020")
thick
and
the
other "No-Go"
.50
mm
(.022)
thick.
The
aleamnce
is
adjusted so
that the
thinnest
gauge
can
be
inserted
e,asily while
the thicker one must
not
enter.
When the
piston
in No
.
l
cyl'inder is
at top
dead
centre
(the
compression
stroke), valve
N,os.
l,
2,
3,
6,
7 and
10 (coun1ed
from
the
front) are adjusted, and
with
the piston
in No.
6 cylinder 'at rtop dead centre,
valV'es
Nos.
4, 5,
8,
9,
11
and
12.
2
:
12
VO LVO
103269
Fig. 2-22.
Valve collet and
valve
guide seal
1. Metal
ring
3.
Washer
2.
Rubber seal
4.
Valve
co
ll
et
CYLINDER BLOCK
Measuring
cylinder
bores
The cyllinder
bores
are measured with
a
specia,l
dial
indicator. Measuring shol1l,d be
carried
out just below
the top edge of the bore only in the
transV'erse
direc-
hon
of the
engine.
A letfe'r is st·amped on each
cylinder
bore indicating
the classification of the bore and piston (only on
standa'rd modells).
Fig.
2-23.
Replacing bush
in
rocker arm
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