Suzuki Liana RH418, Supplementary Service Manual

Page: 178 / 371

1D-52 Engine Mechanical:
Connecting Rod Bearing General Information
Service connecting rod bearings are available in
standard size and 0.25 mm (0.0098 in.) undersize
bearing.
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.
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.
Connecting Rod Bearing Clearance
1) Before checking bearing clearance, clean bearing
and crank pin.
2) Install bearing in connecting rod and bearing cap.
3) Place a piece of gauging plastic (1) to full width of
crank pin as contacted by bearing (parallel to
crankshaft), avoiding oil hole.
4) Install rod bearing cap (1) to connecting rod.
When installing cap, be sure to point arrow mark (2)
on cap to crankshaft pulley side as shown in the
figure. After applying engine oil to rod bolts, tighten
cap nuts (3) gradually as follows.
a) Tighten all cap nuts to 15 N
⋅
m (1.5 kgf-m, 11.0 lb-
ft)
b) Retighten them to 45
°
c) Repeat Step b) once again.
Tightening torque
Connecting rod bearing cap nut (a): Tighten
15 N
⋅
m (1.5 kgf-m, 11.0 lb-ft), 45
°
and 45
°
by
the specified procedure
5) Remove cap, and measure gauging plastic (2) width
at the widest point (clearance) using a scale (1) on
gauging plastic envelope.
If clearance exceeds its limit, use a new standard
size bearing and remeasure clearance.
Connecting rod bearing clearance
Standard: 0.029 – 0.047 mm (0.0012 – 0.0018 in.)
Limit: 0.065 mm (0.0026 in.)
6) If clearance can not be brought to within its limit even
by using a new standard size bearing, regrind
crankpin to undersize and use 0.25 mm undersize
bearing.
NOTE
After checking the rod bearing clearance,
make sure that checking for connecting rod
bolt deformation referring to “Crank Pin and
Connecting Rod Bearings Inspection”.
1. Red paint
I2RH01140164-01
I2RH0B140121-01
I2RH0B140122-01
I2RH0B140123-01