Inspecting The Connection Rod - Yanmar 3JH4E Service Manual

5.4.1 Inspecting the connection rod

(1) Twist and parallelism of the large and
small ends
Insert the measuring tool into the large and
small ends of the connecting rod. Measure the
extent of twist and parallelism and replace if
they exceed the tolerance.
Standard
Connecting rod
Less than 0.03
twist and
(at 100 mm)
parallelism
(2) Checking the side clearance of a connecting
rod
Fit the respective crank pins to the connecting
rod and check to make sure that the side
clearance in the crankshaft direction is correct.
Standard
Connecting rod
0.20-0.40
side clearance
5. Inspection and servicing of basic engine parts
Parallelism
mm
Limit
0.08
Twist measurement using a connecting rod
aligner
Connecting rod
aligner
Limit
0.55
201
1 0 0
m m
1 0 0
m m
Mandrel
Twist
008229-01E
011233-00E
010551-00X