Suzuki 2000 Grand Vitara SQ416, Руководство по обслуживанию

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YH4
GRAND
VITARA
1. Lower crankcase
2. Bolt (10 mm thread diameter)
3. Bolt (8 mm thread diameter)
1. Thrust bearing
2. Oil groove
6A4-74 ENGINE MECHANICAL (J20 ENGINE)
INSPECTION
Crankshaft
Crankshaft runout
Using a dial gauge, measure runout at center journal. Rotate crank-
shaft slowly. If runout exceeds its limit, replace crankshaft.
Limit on runout: 0.06 mm (0.0023 in.)
Crankshaft thrust play
Measure this play with crankshaft set in cylinder block in the normal
manner, that is, with thrust bearing and journal bearing caps
installed. Tighten crankcase bolts to specified torque in such order
as indicated in figure.
Tightening Torque
(a): 60 N
.
m (6.0 kg-m, 43.5 lb-ft)
(b): 27 N
.
m (2.7 kg-m, 19.5 lb-ft)
Use a dial gauge to read displacement in axial (thrust) direction of
crankshaft.
If its limit is exceeded, replace thrust bearing with new standard one
or oversize one to obtain standard thrust play.
Crankshaft Thrust Play
Standard: 0.10 – 0.35 mm (0.0039 – 0.0138 in.)
Limit:
0.42 mm (0.0165 in.)
Thickness of
crankshaft
Standard
2.500 mm
(0.984 in.)
crankshaft
thrust bearing
Oversize:
0.125 mm
(0.0049 in.) 2.563 mm
(0.1009 in.)
Out-of-round and taper (uneven wear) of journals
An unevenly worn crankshaft journal shows up as a difference in
diameter at a cross section or along its length (or both). This differ-
ence, if any, is determined by taking micrometer readings. If any
one of journals is badly damaged or if amount of uneven wear in the
sense explained above exceeds its limit, regrind or replace crank-
shaft.
Limit on out-of-round and taper: 0.01 mm (0.0004 in.)
Out-of-round: A – B
Taper:
a – b