Connecting Rod - Suzuki WagonR+ RB310 Service Manual

6A2-74 ENGINE MECHANICAL (M13 ENGINE)

Connecting rod

Big-end side clearance
Check big-end of connecting rod for side clearance, with rod fitted
and connected to its crank pin in the normal manner. If measured
clearance is found to exceed its limit, replace connecting rod.
Big-end side clearance
Standard: 0.25 – 0.40 mm (0.0099 – 0.0157 in.)
Limit: 0.55 mm (0.0217 in.)
Connecting rod alignment
Mount connecting rod on aligner to check it for bow and twist. If
the measured value exceeds the limit, replace it.
Connecting rod alignment
Limit on bow: 0.05 mm (0.0020 in.)
Limit on twist: 0.10 mm (0.0039 in.)
Connecting rod bolt deformation (Plastic deformation
tightening bolt)
Measure each thread diameter of connecting rod (1) bolt (2) at "A"
on 32 mm (1.25 in.) from bolt mounting surface and "B" on 40 mm
(1.57 in.) from bolt mounting surface by using a micrometer (3).
Calculate difference in diameters ("A" – "B"). If it exceeds limit,
replace connecting rod.
Connecting rod bolt measurement points
"a": 32 mm (1.25 in.)
"b": 40 mm (1.57 in.)
Connecting rod bolt diameter difference
limit ("A" – "B"): 0.1 mm (0.004 in.)