![](../../../img/11/AK202797AB00ENG.png)
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Measure the cam height
(nose-to-heel diameter). If a cam is worn beyond the limit,
replace the camshaft. Standard
values:
Inlet: 37.39 mm Exhaust: 36.83
mm
Limits:
Inlet: 36.89
mm Exhaust: 36.33 mm
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![](../../../img/11/AK202836AB00ENG.png)
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1.Prepare three containers
and approximately five litres of diesel fuel. Pour into each
container the diesel fuel in an amount enough for a lash
adjuster placed in the container in its upright position to
completely submerge.
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![](../../../img/11/AK300587AB00ENG.png)
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2.Place the lash adjuster in
container A and wash its outside surface.
note |
Use a nylon brush if there are
hard-to-remove deposits.
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![](../../../img/11/AK202680AB00ENG.png)
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caution |
The steel ball spring of the
lash adjuster is extremely weak. The lash
adjuster’s functionality may be badly
affected if the special tool is inserted too
strongly.
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3.While gently pushing the internal steel
ball using the special tool Air bleed wire (MD998442), move
the plunger in and out 5 - 10 times to eliminate
stiffness in the plunger and expel contaminated
oil.
note |
The plunger must be free from
jamming and any other abnormalities. If a defect
is found in plunger operation, replace the lash
adjuster.
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![](../../../img/11/AK202681AB00ENG.png)
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4.Take the lash adjuster out
of the container, then move the plunger by pushing the steel
ball gently to discharge the diesel fuel from the pressure
chamber.
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![](../../../img/11/AK202680AB00ENG.png)
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caution |
The steel ball spring of the
lash adjuster is extremely weak. The lash
adjuster’s functionality may be badly
affected if the special tool is inserted too
strongly.
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5.Soak the lash adjuster in the diesel fuel
in container B. Move the plunger in and out 5 - 10
times by gently pushing the internal steel ball using the
special tool Air bleed wire (MD998442) until the plunger
moves smoothly to wash the lash adjuster’s pressure
chamber.
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![](../../../img/11/AK202681AB00ENG.png)
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6.Take the lash adjuster out
of the container, then move the plunger by pushing the steel
ball gently to discharge the diesel fuel from the pressure
chamber.
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![](../../../img/11/AK202682AB00ENG.png)
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caution |
Do not use container C for
cleaning. If cleaning is performed in container
C, foreign matter could enter the pressure
chamber when the chamber is filled with diesel
fuel.
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7.Soak the lash adjuster in the diesel fuel
in container C. Gently push the internal steel ball using
the special tool Air bleed wire (MD998442).
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![](../../../img/11/AK202683AB00ENG.png)
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8.Place the lash adjuster
upright with the plunger at the top. Push the plunger firmly
until it makes a full stroke, then return the plunger slowly
and release the hold of the steel ball to allow the pressure
chamber to be filled with diesel fuel.
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![](../../../img/11/AK300588AA00ENG.png)
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9.
note |
If the lash adjuster
contracts, perform the operations 7 through 9
again. Replace the lash adjuster if it still
contracts even after the pressure chamber has
completely been filled with diesel fuel (air has
been bled).
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Take the lash adjuster out of the container, place
it upright with the plunger at the top, and push the plunger
firmly. The plunger must not move at all. 10.Keep
the serviced lash adjusters in their upright positions to
prevent diesel fuel from spilling out. Protect them from
dust or other foreign matter. Install the lash adjusters
onto the engine as soon as possible.
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