3.2.5. Cam shaft
1) Inspection of cam
(1) Measure the cam height with a
micrometer and replace the camshaft
if the measured value is beyond the
specified limit.
(2) Inspect the cam face for scratch or
damage.
Slight step wear or damage on the
cam face may be corrected with oil
stone or oiled grinding paper. But,
replace if severely damaged.
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EDM2045I
<Figure 3-8> Measuring cam height
2) Inspection of cam shaft
(1) With an outside micrometer, mea-
sure the camshaft journal diameter.
(2) Measure the inside diameter of the
camshaft bushing on the cylinder
block using a cylinder bore indicator,
and compare the measured value
with the camshaft outside diameter to
determine the clearance.
(3) Replace the bushing if the measured
value is beyond the specified limit.
(4) Support the cam shaft on two V-
blocks and check for run-out using a
dial indicator. Correct or replace the
cam shaft if the amount of run-out is
beyond the value indicating need for
servicing.
EAOM4063
<Figure 3-9> Measuring inside diameter of
cam shaft bushing on cylinder block
EFM2046I
<Figure 3-10> Measuring cam shaft run-out
3) Cam shaft end play
(1) Push the thrust plate toward the cam
gear.
(2) With a feeler gauge, measure the
clearance between the thrust plate
and cam shaft journal.
(3) If the end play is excessive, replace
the thrust plate.
EAOM4067
<Figure 3-11> Measuring cam shaft axial play
Cam bushing
