|
|
Use special tool 12.7sq. torx bit
socket (MB992916) to loosen and remove the bolts in
two or three steps.
|
|
1.
| caution |
The thickness of the original
cylinder head gasket is selected
according to the protrusion amount of the
piston. Therefore, if the cylinder block,
piston,
connecting rod or crankshaft is replaced, the
protrusion amount may be changed. Always select
a correct gasket by measuring the protrusion
amount. (Refer to GROUP 11F - Cylinder
Head and Valves  ).
|
To replace the cylinder head gasket only, select a
gasket of correct specification according
to the table below.
|
|
Notch
specification
|
Fitted thickness
mm
|
A
|
1.30 ±
0.05
|
B
|
1.35 ±
0.05
|
C
|
1.40 ±
0.05
|
|
|
|
2.
| caution |
Do not allow any foreign
materials get into the coolant passages, oil
passages and cylinder.
|
Wipe off the sealant and grease on the top surface
of the cylinder block and the bottom
surface of the cylinder head, and degrease the surface where
the sealant is applied.
3.
Apply
the sealant to the top surface of the cylinder block as
shown.
Specified sealant: ThreeBond 1217G or
equivalent
| note |
- Install the cylinder head gasket
immediately after the application of
sealant.
- Apply the sealant so that its bead is
centred at the chamfered cylinder block
surface
and the sealant groove.
|
4.Install the cylinder head gasket to the
cylinder block.
5.Apply the sealant to the top
surface of the cylinder head gasket as
shown.
Specified sealant: ThreeBond 1217G or
equivalent
| note |
- Install the cylinder head assembly
immediately after the application of
sealant.
- Apply the sealant so that the centre of
its bead reaches the edge of the
cylinder
head gasket.
|
6.
| caution |
After the installation, until
a sufficient period of
time (one hour or more) elapses, do not apply
the engine oil or water to the sealant
application
area or start the engine.
|
Install the cylinder head assembly.
|
|
|
1.Replace the cylinder head
bolt assembly with new ones.
|
|
|
2.Apply a small amount of
engine oil to the thread of the bolts and to the
washers.
|
|
3.Use special tool 12.7sq.
torx bit socket (MB992916) to tighten the cylinder head
bolts
by the following procedure (plastic region angular
tightening method).
(1)
Tighten the cylinder head bolts to the specified torque in
the order shown in the
figure in two or three steps.
Tightening
torque: 50 ± 2 N·m
(2)
|
|
| caution |
- When the tightening angle is
smaller than
the specified tightening
angle, the appropriate
tightening capacity cannot
be secured.
- When the tightening angle is
larger than the specified
tightening angle, remove
the bolt to start from the
beginning again according to
the procedure.
|
|
Apply paint marks to the head of cylinder head bolt
and the cylinder head.
(3)
Tighten the cylinder head bolt in a 90° according to
the tightening order.
(4)
Tighten the cylinder head bolt in a 90° according to
the tightening order.
Check that the paint mark on the cylinder head bolt and the
paint mark on the cylinder head
are on a linear line.
(5)
Loosen the cylinder head bolt fully.
(6)
Tighten the cylinder head bolt to the specified torque again
in the order shown in
the figure.
Tightening torque: 50 ± 2
N·m
(7)
Tighten the cylinder head bolt in a 90° according to
the tightening order.
(8)
Tighten the cylinder head bolt in a 90° according to
the tightening order.
(9)
Tighten the cylinder head bolt in a 90° according to
the tightening order.
Check that the paint mark on the cylinder head bolt and the
paint mark on the cylinder head
are at an angle of 270°.
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