Valmet 309 - Fitting the Cylinder Head (611, 612)

K. FITTI
G Tlf CrL
|l|)€R
rf D 6
,
6t2
319
Measure ihe lengl-h
ot
ihe
cyllnd€r
head
flxlng
scrers. The lengih
should b€
rlihln
-the
llnlts lndlcaied
in
flg.
J
19
.
ll any screr
dllfers in
length,
replace
ii.
321
5, Tlghien
the
scrers ln ihe mentloned
sequenco
60ö
(angular
dlstance
on
lhe screr
head). Use
socket rrench
4361 31341
and lndlc6tor 856f
llf42 rlih magnetlc flxlng.
The ou+slda of +he
socke+ wrench
has a
hole
marked ai Iniervals
o{
600. Seftlng the Indlcaior
af the
holes helps
tlght€n
fhe
screr to the
corrgct
iorque.
Tlghten
the
scrers 600
(one
öngular dls+ance
=
one hole dis+ance on fhe
socket rrench).
Tlghten ihe
scrsrs
600
(one
angulor dls+anco
=
one
holg
dlstance on fhe
sockef rrench).
Fli fhe valye
tappe+s In lhelr
posltlons
and
tlx
ihe valve
gears
io
+he cyllnd€r
heads.
Tlghien fhe
valve
geat-
flxlng bracksts evenly
and the outernosi brackets
so lhat lhe
yashers
o+ thg rocker arn
shat+
gnds
beslde the lock
rl ng
rotaie
lreely.
ll.
Run
lhe englne for abouf
50
nlnuies ,lth a
llght load.
Tlghten the
scrers 600
(one
angular dlstance
=
one
hole
dlsiance on ihe
sockel rrench) and
adJ
ust
lhe va
lves,
2. Flx fhe
cyl lnder head studs
io the
cyllnd€i
block
(J0
Nm).
Instöll
lhe valve laDDets In
ihelr
pos
ltlons.
f. Chock that the
seallng
surfaces of the cyllnder
block and heads are
clean.
Placa +he
h€ad
gaskets
and cyllnder heads ln thglr
posltlons.
Ensure lha+ +he
cy I Inder heads are
stra lght
and
parallel
fo
each
qther
by uslng a stg6 |
ru ler
(
lnlet nanlfold s€allng). Tlghten
+ho
cleaned
and I lghily ol
led screws and
nuts.
8.
9. Adjust the valve
clearances.
Sco lnstructloos
polnt
I 2
C.
10.
Flf
all
fhe
o+her
p€rts you
dlsnoun+ed durlng
cy I Inder
head removal.
Perform
the f
l.st
In flg.5
20
fo
+cr'que
yagnch.
tl
gh+en
I ng
ihe
+orque
order
g
lven
Nm, uslng 6
ln lhe
of 40
611
,612
3-11