Volvo D24 - Tightening Sequence for Cylinder Head Bolts; Tightening of Cylinder Head Bolts

Specifications
TIGHTENINGTOROUES
Tight€ning
torquB apply
to oiled nuts and bo|Is.
grsased
{washed}
parts
must b€ oiled
prior
to
De-
NGHIENING
OF
CYLINDER HEAD BOLTS
TIGHIENITVG
SEOUENCE FOR CYLIIIDER XEAD BOLTS
lmportlntl
slsck6n botts in rev€rsa
oder when
removing
cylindsr h€ad.
Removs oiland
dirtfrom bolt holes.
Oil
left
in hol€s will
reduc€
pressure
on cylinder head
gasket,
Eolt threads
and washers
must however be
oiled,
otherwise frictional forces
will b6 too
grear.
Two types
ot bolls ars in
uset An early type
with M 1 1
threads
and 6 later
type with M 12 threads.
{Later
typ€ is
lhr@d6d along
entir€ l6ngth.l
Us6 now
waahera, convex
sid6 upwards,
Tlght€n
in fiv€
stages:
l50Nm{37ftlbsl
2 ?0 Nm
(50
ft lbs)
3 90 Nm
{65 ft lbs}
4 run
6ngin€ until
oil temperaturo
is st t€ast
50.C
1122'Fl
5 90 Nm
(65
ft lbs)
R.lightening
-
Atler
600-1.200 miles
(1,000-2.000
km).
Engine
should
be cold
or almost cotd.
Tighten
each boltsep6r-
atsly in
specifi€d
order,
see abovs fio.:
L
Slack€n
bol 3(r
2. Torque
to 90 lrlm
(65
ft tbs)
Us€ n.u bolb.
Not n€ce$ary
to roplac€ w6shers.
Tighten
in
six stag6s:
1 ao
Nm
€0
ft lbsl
2 60 Ntn
l4a ft lbsl
3 75 Nm
{55
ft lbs)
4 angle-tightsn
l8f in
ono movem€nr without
stop-
ping,
{Se€
figur€ 6t lower lefi}
5 run €ngin€ until
oil tehperature is
at lerst 50oC
lt22
"Fl
6 anglo-tighten 90P in
on6 movsment
without stop-
pins.
Rdighl.nlng
After
60F1,200 mil€6
(1,000-2,000
km). Engine should
b6
cold or almost cold.
Tighten
6ach boll
separatoly in spocifi€d
order, se€
€bov€ fig.:
1. Angle-tighten
bolt 9|r in
one movemont without
stopping.
(See
figure
at
lower left)
Do not shckon boh
firf,
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oo
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,Ot rO
D20
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D24
o
Mtl
M12