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2 c.203 Series
Cylinder head torque sequence
4.203 and 4.2032
Cautlon: fhis operclion must be done by a person
with the efte!
lraining. ll in doubt rcfer to the
Workshop Manual.
Flame prot@ted engines still have all nuls. All other
engrne were chäng€d to nuts and selscrews, trom
the engine numbers below.
203U93838CL
203U6963D1
203U41304340L
On 4.203 ongln€s, all bul two of the studs were
changed to setscrews as well as lhe eighl special
studs which also relain the alomisers.
On D4.203 and 4.2032 englnes, all bul two of the
sluds were changed io setscrews.
ll llese
tuo studs are removed they must be pul
back n lheir correct posilions, because they guide
lhe cylinder head gaskel inlo posilion.
'|
Lighlly lubricate lhe threads ol the fasten€6.
2 Gradually and evenly tighten lhe lasteners
to the
correct lorque In lhe sequence shown in (A or B).
Repeat to ensure thal all th€ lasteneß
are tightened
10 the coiiecl toreue shown in the lable below.
Ceutlon:
Engines
litted with cylinder
head gasket,
pan number 3681213A, must have the lasleneE
for
lhe cylindet
head lighlened
again aner the fist
25/54 hau of use
-{7-?:ilrc:::
- o i r -
3
r s z - r o p
L 7 .
S
r
1
o
t
o
t 6
t ^ o
t ^ o
t
^ o ^ t
o
f i u ^ i . ' ^ '
q ^ ä ' ? - ' ' ,
l'ol.'-iol- 8eF,bi
-^
,,
-o
-'
.-.ro a
t - e a r ] r
?
J . 6 ? r
ö
o
n
a
^
?
i
2
^
. - - . - ^ " ?
" " ) " Y
1 5 - 1 3 6 . ?
- 3 : 8 _ 1 0 - 1 4
Not6: Release lhe cylinder head selscrews
eventy
and gradually in the reveße
sequence
to lhal shown
i n ( A ) .
Faslener
rype
lllustralion
and oosition
Slud
a
1 0 , 1
Setscrew
A 1 t o 9 a n d 1 2 1 o 1 9
Fastener
type
lllustation
and posilion
St!d
B
1 7
Selscrew
B 1 t o 1 5 a n d 1 8 t o 2 3
F a s l e n e r l y p e
Torque
Nuts onlv tned
81 Nm (60 lbf tt) 8,3 kal m
Nuls and selscrews
95 Nm (70 lbl tl) 9.7 kol m
Perkins Service Data Booklel Part 1, 1997
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