(4) To dm:k the rod wilh a piston, place lhe rod on
the surface plate as shown below, insert a
round bar of the crankpin diameter into and
through its big end bore, and take measurement
at .. A" and "B." The difference between the lwo
measurements tells the straighleness of the rod.
When one or more. or all connecting rods are to
be replaced, select new rods so that 1he variance
in weight among the rods is within the value
given in 1he specification.
Specification
Unit: gram (oz)
Variance in weight
among connecting rods
±25
(±0.83)
(5) Check the connecting rod end play as follows;
Check each connecting rod for end play in the
manner illustrated, with the cap bolts tightened
to 5
.5
kg-m
(39
.8 lb-ft). Use a thickness gauge to
measure the end play (which is the clearance between
big end and crank arm). If the clearance measured
exceeds the service limit, replace the connecting
rod or bearing.
Specifications
Unit: mm (in.)
Item
Standard
Service
limit
Connecting rod
0.15-0.35
0.50
end play
(0.0059..., 0.0138)
(0.0197)
(6) Check the bearings as follows:
(a) Inspect each bearing for evidence of wiping or
fatigue failure, for scratches by dirt particles
imbetlded in and for improper seating on the
bore. Determine whether the bearing should
be re-used or replaced on the basis of findings.
(b) Check the radial clearance between crankpin
and bearing; if the repair limit specified below
is exceeded by the checked clearance, replace
the bearing. Where the crankpin is to be ground
to the next undersize, use a replacement
bearing of that undersize.
A
B
/ /
/
Checking connecting rod on surface plate
Checking end play of connecting rod
