Suzuki 2000 Grand Vitara SQ625 Service Manual page 398

6A2-74 ENGINE MECHANICAL (H25 ENGINE)
1
1. Gaging plastic
(a)
Crank Pin and Connecting Rod Bearings
D Inspect crank pin for uneven wear or damage. Measure crank pin
for out-of-round or taper with a micrometer. If crank pin is dam-
aged, or out-of-round or taper is out of limit, replace crankshaft or
regrind crank pin referring to following step 6).
Standard
0.25 mm (0.0098 in.)
undersize
Out-of-round: A – B
Taper limit
Out-of-round and taper limit: 0.01 mm (0.0004 in.)
D Rod bearing:
Inspect bearing shells for signs of fusion, pitting, burn or flaking
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. For identification of undersize bear-
ing, it is painted red at the position as indicated in figure, under-
size bearing thickness is 1.605 – 1.615 mm (0.0632 – 0.0635 in.)
at the center of it.
1. Red paint
D 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 gaging plastic to full width of crank pin as con-
tacted by bearing (parallel to crankshaft), avoiding oil hole.
4) Install rod bearing cap to connecting rod.
When installing cap, be sure to point arrow mark on cap to
crankshaft pulley side, as shown in figure. After applying en-
gine oil to rod bolts, tighten cap nuts to specified torque. DO
NOT turn crankshaft with gaging plastic installed.
(a)
Tightening Torque
(a): 45 N
(a)
Connecting rod
bearing size
: a – b
.
m (4.5 kg-m, 32.5 lb-ft)
Crank pin diameter
49.982 – 50.000 mm
(1.9678 – 1.9685 in.)
49.732 – 49.750 mm
(1.9580 – 1.9586 in.)