4-38 82E-5 – 98E-5 SERIES
4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES
4.4.5 Parts inspection and measurement
(1) Cylinder block
Especially clean head surface, cylinder bores
and oil holes, and check after removing any car-
bon deposit and bonding agent.
(a) Appearance inspection
Check if there is any discoloration or crack.
If crack is suspected, perform color check.
Sufficiently clean the oil holes and check
they are not clogged.
(b) Cylinder bore and distortion
Measure at 20 mm below the crest of the
liner, at 20 mm from the bottom end and at
the center.
Roundness:
Roundness is found as follows though it is
the simple method. Measure cylinder diam-
eters of the A direction and the B direction
on each section of a, b and c.
Roundness is the maximum value among
those difference values.
Cylindricity:
Cylindricity is found as follows though it is
the simple method.
Measure cylinder diameters of a, b and c
sections in the A direction, and calculate the
difference in maximum value and minimum
value of the measured diameters.
In the same way measure and calculate the
difference in the B direction.
Cylindricity is the maximum value between
those difference values.
mm
Item Model Standard Limit
Cylinder inside diameter
3D82AE 82.000 – 82.030 82.200
(S)3D84E, (S)4D84E 84.000 – 84.030 84.200
3D88E, 4D88E 88.000 – 88.030 88.200
4D94LE 94.000 – 94.030 94.130
(S)4D98E 98.000 – 98.030 98.130
Cylinder bore
Roundness
all models 0.01 or less 0.03
Cylindricity
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