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While compressing the valve spring
using special tool valve spring compressor (MD999597),
remove the retainer lock.
| note |
To facilitate reassembly, the
valve, spring and other parts removed should be
kept together
and attached with a tag showing where it has
been assembled including the cylinder
number.
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Use special tool valve stem seal
pliers (MB992085) to nip the base of the stem seal (where
the outside diameter is larger) securely, and remove it by
twisting it to the left and right.
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1.
| caution |
- The valve stem seal
must not be reused.
- Do not damage the tappet wall during
assembly.
- Be sure to use a special tool to install
the valve stem seal. Poor installation
causes oil loss via valve
guides.
- If oil is not applied, the valve stem
seal may rise to the surface after it is
press
fitted.
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Apply a small amount of engine oil to the press-fit
part and lip part of the new valve
stem seal.
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2.Use a special tool to
install the valve stem seal, obeying the following
procedures.
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3.Special tool valve stem
seal installer adjustable (MB992922) is composed of the
components
shown in the illustration.
1: Chuck
2: Sleeve
3:
Rock nut (small)
4: Outer pipe
5: Rock nut
(large)
6: Guide pin (5.9)
7: Guide pin (4.9)
8:
Cap
9:Guide pin (5.4)
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4.Adjust the inside chuck
diameter, obeying the following procedures.
(1)
Install the sleeve to the chuck as shown in the
illustration.
(2)
Install the shoulder of the valve stem seal to the chuck,
aligning with the outer
circumference line of the chuck as shown in the
illustration.
(3)
Turn the sleeve to wring the chuck.
(4)
Stop the sleeve at the position where you can easily remove
the valve stem seal by
hand.
(5)
Use the (small) rock nut to fix the sleeve.
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5.Adjust the stem seal
insertion length [L (L1)], obeying the following
procedures.
(1)
The position, in which the end face of the outer pipe is
aligned with the outer circumference
line of the chuck, is 0 mm of the insertion length. Insert
the chuck and the sleeve into the
outer pipe to fit the nut as shown in the
illustration.
(2)
Turn the chuck to adjust the valve stem seal insertion
length.
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| note |
The insertion
length can change by 1 mm per the
chuck turn.
To easily know how
many times the chuck is turned, put
the mark at the position shown
in the illustration.
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(3)
Use a vernier caliper to measure the checkpoint (L1) of the
insertion length shown in
the illustration. Check the insertion
length.
L1: 14.4 mm
(4)
Use the (large) rock nut to fix the sleeve.
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6.Install the cap to the
guide pin (4.9).
7.Install the guide pin (4.9) as
shown in the illustration.
8.Apply the engine oil
to the valve stem seal to set the chuck.
9.Install
the valve spring seat.
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10.Use the plastic hammer to
insert the valve stem seal.
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While compressing the valve spring
using special tool valve spring compressor (MD999597),
install the retainer lock.
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1.Completely remove the
liquid gasket on the upper plane of the cylinder block and
the lower
plane of the cylinder head.
2.
| caution |
Sufficiently check that there
is no residual oil on the
place where degreasing is performed. If
fingerprints are left, do not touch it with bare
hands
after the degreasing, since the oils from your
fingers will harm the seal ability.
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Degrease the place specified in the
illustration.
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3.As shown in the
illustration, apply a 2 to 3 mm of sealant to the top face
of cylinder
block.
Specified sealant:
Three
bond 1217G or
equivalent
4.Install the cylinder
head gasket.
| note |
Check that the centre of the
liquid gasket is located toward the cylinder
gasket in the
position specified in the illustration.
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5.As shown in the illustration, apply a 2 to
3 mm of sealant to the top face of cylinder
head gasket.
Specified
sealant:
Three bond 1217G or
equivalent
6.Install the cylinder
head assembly.
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1.Install the cylinder head
bolt and washer assembly onto the cylinder head.
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2.In accordance with the
installation order, tighten them to the specified torque of
24.5 ±
2.0
N·m in several steps.
3.Make sure all bolts
reach the specified torque.
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4.Put paint marks on the
bolt heads and the cylinder as
illustrated.
5.
| 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.
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Tighten the bolts in the correct sequence by 180 to
184 degree angle.
Ensure that the paint marks on the bolt
heads and the cylinder are aligned in a straight
line.
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