Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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6A1-58 ENGINE MECHANICAL (G16 ENGINE)
Crank Pin and Connecting Rod Bearings
1) 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 referring to following
Step f).
Crank pin and connecting rod bearing specification
Crank pin out-of-round
Limit : 0.01 mm (0.0004 in.)
Crank pin taper
Limit : 0.01 mm (0.0004 in.)
2) Rod bearing :
Inspect bearing shells for signs of fusion, pitting, burn or flak-
ing and observe contact pattern. Bearing shells found in
defective condition must be replaced.
Two kinds of rod bearing are available; standard size bearing
and 0.25 mm undersize bearing. To distinguish them, 0.25
mm undersize bearing has the stamped number (US025) on
its backside as indicated in figure, but standard size one has
no number.
3) Rod bearing clearance :
a) Before checking bearing clearance, clean bearing and
crank pin.
b) Install bearing in connecting rod and bearing cap.
c) Place a piece of gaging plastic (1) to full width of crankpin
as contacted by bearing (parallel to crankshaft), avoiding oil
hole.
d) Install rod bearing cap (1) to connecting rod.
When installing cap, be sure to point arrow mark (2) on cap
to crankshaft pulley side (3), as shown in figure. After apply-
ing engine oil to rod bolts, tighten cap nuts to specified
torque. DO NOT turn crankshaft with gaging plastic
installed.
Tightening torque
Connecting rod bearing cap nut
(a) : 35 N·m (3.5 kg-m, 25.5 lb-ft)
Connecting rod bearing size Crank pin diameter
Standard
43.982 – 44.000 mm
(1.7316 – 1.7322 in.)
0.25 mm (0.00984 in.) under-
size 43.732 – 43.750 mm
(1.7218 – 1.7224 in.)