Inspecting Connecting Rod Bend And Twist6-15 - Mitsubishi L Series Service Manual

4.7 Inspecting connecting rod bend and twist
(1) Measure the dimensions of C and L in the illustration to
check bend and twist of the connecting rod. Straighten
the connecting rod with a press to meet the standard.
If the standard is exceeded after correction, replace the
connecting rod with a new one.
(2) In general, a connecting rod aligner is used to check
bend and twist.
Note: Before checking bend, tighten the connecting rod cap
to the specified torque.
(3) To inspect the connecting rod with the piston installed,
turn the piston upside down and place it on a surface
plate. Insert a round bar having the same diameter as
the crankpin into the big-end bore, and measure the
height of the bar using a dial gauge.
Item Standard
0.05/100 mm
Bend and twist of
[0.0020/3.94 in.]
connecting rod
or less
C
L
Tightening torque
of connecting rod
cap
Limit
31.4 to 34.3 N m
{3.2 to 3.5 kgf m}
0.15/100 mm
[23.1 to 25.3 lbf ft]
[0.0059/3.94 in.]
INSPECTION AND REPAIR OF BASIC ENGINE
0.05 0.0020
[ ]
100 3.94
C
L
Piston
pin
Connecting rod twist
Inspecting connecting rod bend and twist
Measurement with connecting rod aligner
C
0.05 0.0020
C
[ ] A
D 100 3.94
Measuring bend of connecting rod
C 0.05 0.0020
[ ]
L 100 3.94
L
C
Connecting rod bend
Unit: mm [in.]
Unit: mm [in.]
B
6-15