6-20
Chapter 6 INSPECTION AND REPAIR OF BASIC ENGINE
(4) Measure the inside diameter of the connecting rod
bushing.
If the value is out of the standard, ream the inside diam-
eter to the standard.
Connecting Rod Bushing Inside Diameter - Measure
4.11 Connecting Rod Assembly Weight Rank
When replacing a connecting rod, be sure to check the
weight rank of the connecting rod, and use the connecting
rod having the same weight rank mark. All the connecting
rods in one engine must have the same weight rank mark.
Note: The weight rank of connecting rod assembled in en-
gine is also stamped on caution plate.
Connecting Rod Weight Rank Mark Location
4.12 Bore Diameter and Roundness of Connecting Rod Big End - Measure
Measure the connecting rod bore diameter at front and rear
ends respectively in the directions A, B and C as shown in
illustration.The roundness is determined by subtracting the
minimum value from the maximum value among measure-
ments of A, B and C.
If the value exceeds the limit, replace the connecting rod
with a new one.
Connecting Rod Big End Bore Diameter - Measure
Item Standard value
Inside diameter of connecting rod bush-
ing
58.020 to 58.040 mm
[2.2843 to 2.2850 in.]
Inside diameter of
connecting rod bushing
Bushing inner surface
roughness
Ra0.4μm]_
ٖٖٖ
1.6S
Connecting rod
Connecting rod
bushing
Weight rank list
Part No. Weight rank Weight
Allowable
value
32619-81110 A
7100 g
[250 oz.]
±20g
[0.71 oz.]
32619-81210 B
7200 g
[254 oz.]
32619-81310 C
7300 g
[257 oz.]
32619-81410 D
7400 g
[261 oz.]
32619-81510 E
7500 g
[264 oz.]
32619-81610 F
7600 g
[268 oz.]
32619-81710 G
7700 g
[271 oz.]
32619-81810 H
7800 g
[275 oz.]
Weight rank mark location
Item
Nominal
value
Standard
value
Limit value
Round-
ness limit
Connecting
rod big end
bore diame-
ter
ø110 mm
[4.33 in.]
110.000 to
110.022 mm
[4.3307 to
4.3316 in.]
Minimum:
109.950 mm
[4.3287 in.]
Maximum:
110.050 mm
[4.3327 in.]
0.100 mm
[0.0039 in.]
A
B
C
Front Rear
Measurement
direction
Measurement
point
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