4-30 82E-5 – 98E-5 SERIES
4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES
4.3.5 Parts inspection and measurement
(1) Camshaft
Mainly check the contact between the tappet and cam contact surface, bearing seizure and wear, and gear
damage.
(a) Shaft bend measurement
Support the camshaft with V blocks. Rotate
the camshaft and measure the runout at the
center of the camshaft and at each journal
with a dial gauge. Half of the runout is the
bend.
mm
(b) Intake/exhaust cam height measurement
mm
(c) Camshaft and bearing hole measurement
Measure the camshaft outside diameter with
a micrometer. The oil clearance shall be
calculated by subtracting the measured
camshaft outside diameter from the inside
diameter of the camshaft bearing or bush-
ing. The camshaft bushing at gear case side
is measured with a cylinder gauge after
insertion to the cylinder.
Item Standard Limit
Bend 0 – 0.02 0.05
Model Standard Limit
3D82AE – 4D88E
38.600 –
38.800
38.350
4D94LE, (S)4D98E
43.400 –
43.600
43.150
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