Crank Pin And Connecting Rod Bearings Inspection - Suzuki Swift Sport 2004 Service & Repair Manual

Connecting rod bearing cap bolt deformation
(Plastic deformation tightening bolt)
Measure each thread diameter of connecting rod
bearing cap bolt (1) 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 (2).
Calculate difference in diameters ("A" – "B"). If it is
exceeds limit, replace connecting rod bearing cap bolt
(1).
Connecting rod bearing cap bolt measurement
points
"a": 25 mm (0.98 in.)
"b": 40 mm (1.57 in.)
Connecting rod bearing cap bolt diameter difference
Limit ("A" – "B"): 0.1 mm (0.004 in.)
Crank Pin and Connecting Rod Bearings
Inspection
Crank Pin Diameter
Inspect crank pin for uneven wear or damage. Measure
crank pin for out-of-round or taper with a micrometer. If
crank pin is damaged or out-of round or taper is out of
limit, replace crankshaft or regrind crank pin to undersize
and use undersize bearing.
Crank pin diameter
Connecting rod
bearing size
Standard
0.25 mm (0.0098 in.)
undersize
I6RS0C140024-01
S7RS0B1406034
Crank pin diameter
41.982 – 42.000 mm
(1.6528 – 1.6535 in.)
41.732 – 41.750 mm
(1.6430 – 1.6437 in.)
Out-of-round
A – B
Taper
a – b
Crank pin taper and out-of-round
Limit: 0.01 mm (0.0004 in.)
Connecting Rod Bearing General Information
Service connecting rod bearings are available in
standard size and 0.25 mm (0.0098 in.) undersize
bearing, and standard size bearing has 5 kinds of
bearings differing in tolerance.
For identification of undersize bearing, it is painted red at
the position as indicated in the figure, undersize bearing
thickness is 1.605 – 1.615 mm (0.0632 – 0.0635 in.) at
the center of it.
1. Red paint
Connecting Rod Bearing Visual Inspection
Inspect bearing shells for signs of fusion, pitting, burn or
flaking and observe contact pattern. Bearing shells
found in defective condition must be replaced.
Engine Mechanical: 1D-50
I2RH0B140120-01
I2RH01140164-01