Installation Of Cylinder Head; Torque Cylinder Head Bolts - Toyota 3b Repair Manual

EM-46 ENGINE MECHANICAL
-
Cylinder Head
B,
1
18 38
B,
1
18
'I4B
@-
_--+" lq
12
Gasket
Thick'\,/
No
Mark
(1.5)
No
Mark
(1.5),
1
.6 or
1.7
INSTALLATION
OF
CYLINDER HEAD
{See page
EM-29}
B
and
38
(See page EM-30) 118 and 14B
1.
INSTALL CYLINDER HEAD
(a)
Place
a new
head gasket over dowels on the cylinder
block.
NOTICE:
Trouble
will
arise
if
the wrong cylinder
head
gasket is installed.
HINT:
(8,38,
11Band
148)
Confirm
that the new
gasket
is
appropriate
for
the
engine you
are repairing by checking
the
number
of
cutouts.
(B
and 38)
Only one
thickness
of
gasket exists
for
both
these
engines, gasket
with
no mark (1.5 mm,/0.059
in.).
(B
and 118)
Gaskets
with no cutout are
used
only in factory assembly
and are not available
as a
supply part.
(11Band
148)
.
There
are
three different thicknesses of gasket
availa-
ble [No mark
:
1.5 mm (0.059 in.), 1.6
:
1.6
mm
(0.063 in.l, 1.7
--
1.7 mm (0.067
in.)].
.
When
replacing
the gasket only, use
a
new gasket
with the
same thickness identification number
as
shown on the originally installed gasket.
However,
when replacing piston, crankshaft or
con-
necting rod, select
the
appropriate cylinder
head
gasket according to the
piston protrusion. (See
page
EM-96)
(b)
Position the cylinder
head
over dowels on the
block.
2.
TOROUE CYLINDER HEAD BOLTS
HINT:
o
The cylinder head bolts are tighten in three progressive
steps.
o'
lf any
of
the bolts break or deform, replace them.
o
lf
the cylinder head bolts are
to
be replaced, use
only
cylinder head bolts with a 12-sided
head.
(a)
Apply
a
light coat of engine oil on the
threads
and
under the cylinder head
bolts.
(b)
First, uniformly torque
the
eighteen cylinder
head
bolts in several passes and in the sequence shown.
Torque:
5OO
kg-cm (36 ft-lb, 49 N.m)
lf any one of the bolts
does not meet the torque
specifica-
tion, replace the bolt.
2 6.8.,14s