![](../../../img/11/AC404316AF00ENG.png)
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Loosen the front camshaft bearing
cap mounting bolts in the order shown, and then loosen
each camshaft bearing cap mounting bolts as well. Remove the
front camshaft bearing cap and
each camshaft bearing cap.
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To facilitate reassembly, attach a
tag to each valve tappet removed that
shows where it has been assembled.
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1.Temporarily install the
oil pan which was removed at the timing chain case
removal.
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2.
caution |
When supporting the engine
assembly with a garage jack, be
careful not to deform the oil pan.
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Place a garage jack against the oil pan with a piece
of wood in between to support the
engine assembly.
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3.Remove special tool engine
hanger (MB991928 or MB991895) for holding the engine
assembly,
which have been attached when the timing chain case was
removed.
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4.Remove the brake booster
vacuum pipe (LHD: Refer to GROUP 35A - Master Cylinder
Assembly and Brake Booster Assembly , RHD: Refer
to GROUP
35A - Master Cylinder Assembly and Brake Booster
Assembly ).
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5.Remove the engine hanger
(Refer to GROUP 11B - Fuel and Emission Parts ).
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![](../../../img/11/ACB04330AB00ENG.png)
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6.Screw in special tool
retainer holder attachment (MB992090) to special tool valve
spring
compressor (MD998772), and assemble special tool retainer
holder C (MB992089). 7.
caution |
When removing the valve spring
retainer lock, leave the piston
of the cylinder in the TDC (Top Dead Centre)
position. The valve may fall into the cylinder
if the piston is not properly in the TDC
position.
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Install special tool MD998772 (with special tools
MB992090 and MB992089 attached) to the
cylinder head and compress the valve spring. Then, remove
the valve spring retainer lock.
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![](../../../img/11/AKB00107AB00ENG.png)
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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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![](../../../img/11/AKB00106AE00ENG.png)
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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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![](../../../img/11/AKA00417AB00ENG.png)
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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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![](../../../img/11/AKB00167AB00ENG.png)
![](../../../img/11/AKA00541AF00ENG.png)
![](../../../img/11/AKA00420AB00ENG.png)
![](../../../img/11/AKA00418AB00ENG.png)
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5.Adjust the stem seal
insertion length, 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.
(4)
Use the (large) rock nut to fix the sleeve.
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![](../../../img/11/AKA00419AE00ENG.png)
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6.Install the cap to the
chuck. 7.Apply the engine oil to the valve stem
seal to set the chuck. 8.Install the valve spring
seat.
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![](../../../img/11/AKB00043AC00ENG.png)
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9.Use the plastic hammer to
insert the valve stem seal.
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In the same manner as removal, use
special tool valve spring compressor (MD998772) attached
to compress the valve spring, and install the valve spring
retainer lock.
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Reassemble each valve tappet to the
correct location shown on the tag.
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![](../../../img/11/AC205417AB01ENG.png)
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1.Camshaft bearing caps
(No.2 to 4) are identical. To avoid confusion (bearing cap
No. and
inlet/exhaust side), confirm each identification mark
and face the front mark towards
the direction shown before installing
them. Identification mark (engraved on the
front and bearing caps No.2 -
4)
I: Inlet side E: Exhaust
side
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![](../../../img/11/AC404316AG00ENG.png)
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2.Tighten each camshaft
bearing cap mounting bolts to the specified torque in the
order
shown, and then tighten the front camshaft bearing cap
mounting bolts as well. Tightening
torque:
Camshaft bearing cap mounting
bolts: 11 ± 1
N·m Front camshaft bearing cap mounting
bolts: 20 ± 1 N·m
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