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1.Remove the fuel injector
and common rail assembly and also the rocker cover assembly
(Refer to ).
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![](../../../img/11/AK802487AB00ENG.png)
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2.
caution |
The crankshaft should always
be turned in a clockwise direction.
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Align the camshaft sprocket timing marks and set the
No. 1 cylinder at compression stroke
top dead centre.
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![](../../../img/11/AK802553AD00ENG.png)
![](../../../img/11/AKB00108AB00ENG.png)
![](../../../img/11/AKB00109AB00ENG.png)
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3.For the portions with the
arrows shown below, measure and adjust the valve clearances
by using the following procedures. <
Inlet side >
1.) By using the special tool
MB992852 (valve adjusting feeling gauge), check that
the clearance is within the standard value between the
valve stem and adjusting
screw.
Standard value (cold engine):
0.14 ±
0.03 mm
2.)If the valve clearance
is not as specified, loosen
the adjusting screw lock nut and adjust the clearance
using the special tool MB992852 (valve
adjusting feeling gauge) between the valve stem and the
adjusting screw while turning the adjusting
screw.
caution |
Pay special attention that the
tightening torque is not beyond
this valve. If the tightening torque is beyond
the valve, the valve stem would possibly
bend.
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3.)While holding the adjusting screw
with a screwdriver
to prevent it from turning, tighten the lock nut to the
specified torque using the special tool
MB991477 (valve adjusting
socket).
Tightening torque: 9 ±
1 N·m <
Exhaust side >
1.) By using the thickness
gauge, measure the clearance between the cam and roller.
Standard value (cold engine): 0.16
±
0.03 mm
2.) By using the thickness
gauge, measure the clearance between
the cam and roller.
caution |
Pay special attention that the
tightening torque is not beyond
this valve. If the tightening torque is beyond
the valve, the valve stem would possibly
bend.
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![](../../../img/11/AK802845AD00ENG.png)
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3.)While holding the
adjusting screw with a screwdriver
to prevent it from turning, tighten the lock nut to the
specified torque using the special tool MB992046
(valve adjusting socket), valve adjusting
socket.
Tightening torque: 9.8 ±
1 N·m
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![](../../../img/11/AK802553AE00ENG.png)
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4.Turn the crankshaft
360°
clockwise to bring No. 4 cylinder to the top dead centre
position. 5.For the portions with the arrows shown
below, measure and adjust the valve clearances
by using the same procedures as ones in the Step
3. 6.Install the rocker cover assembly and also
the fuel injector and common rail assembly
(Refer to ). 7.Confirm
there is no fuel leak from the joint for the injection pipe
(Refer to GROUP
13D -
On vehicle Service -
Fuel Line Leak Check ).
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