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1.Remove the rocker
cover.
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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/ACD02455AD00ENG.png)
![](../../../img/11/AKB00108AB01ENG.png)
![](../../../img/11/AKB00109AB00ENG.png)
![](../../../img/11/AK802845AD00ENG.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. (1)
<Inlet side> (2)
By using special tool valve adjusting feeler gauge
(MB992852), 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 (3)
If the valve clearance is not as specified, loosen the
adjusting screw lock nut and
adjust the clearance using special tool (MB992852) between
the valve stem and the adjusting
screw while turning the adjusting screw. (4)
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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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While holding the adjusting screw with a screwdriver
to prevent it from turning, tighten
the lock nut to the specified torque using special tool
valve adjusting socket (MB991477). Tightening
torque: 9.0 ± 1.0 N·m (5)
<Exhaust side> (6)
By using the thickness gauge, measure the clearance between
the cam and roller. Standard value (cold
engine): 0.16 ± 0.03 mm (7)
By using the thickness gauge, measure the clearance between
the cam and roller. (8)
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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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While holding the adjusting screw with a screwdriver
to prevent it from turning, tighten
the lock nut to the specified torque using special tool
valve adjusting socket (MB992046), valve
adjusting socket. Tightening torque: 9.8
± 1.0 N·m 4.Turn the
crankshaft 360° clockwise to bring No. 4 cylinder to
the top dead
centre position.
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![](../../../img/11/ACD02455AE00ENG.png)
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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.
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