INSPECTION


CAMSHAFT

Measure the cam height. If it is below the limit, replace the camshaft.


Standard value
 Minimum limit
A: Inlet low speed cam
 37.28 mm
 36.78 mm
B: Inlet high speed cam
 36.23 mm
 35.73 mm
C: Exhaust cam
 37.84 mm
 37.34 mm

LASH ADJUSTER
caution
  • The lash adjusters are precision-engineered mechanisms. Do not allow them to become contaminated by dirt or other foreign substances.
  • Do not attempt to disassemble the lash adjusters.
  • Use only fresh diesel fuel to clean the lash adjusters.

1.Prepare three containers and approximately five liters 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.

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.

3.
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.
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.

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.

5.
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.
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.

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.

7.
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.
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).

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.

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).
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.