Crankshaft Inspection - Suzuki Grand Vitara Service Manual

1D-56 Engine Mechanical: For M16A Engine with VVT

Crankshaft Inspection

Crankshaft Runout
Using a dial gauge, measure runout at center journal.
Rotate crankshaft slowly. If runout exceeds its limit,
replace crankshaft.
Crankshaft runout
Limit: 0.02 mm (0.0008 in.)
Crankshaft Thrust Play
1) Measure this play with crankshaft set in cylinder
block in the normal manner, that is with thrust
bearing (1) and journal bearing caps installed.
Thickness of crankshaft thrust bearing
Standard: 2.500 mm (0.0984 in.)
Oversize (0.125 mm (0.0049 in.)): 2.563 mm
(0.1009 in.)
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2) Tighten main bearing cap No.1 bolts (1) – (10) and
S5JB0A1416037 main bearing cap No.2 bolts (11) – (20) gradually as
follows.
NOTE
If main bearing cap No.1 bolt is reused, make
sure to check main bearing cap No.1 bolt for
deformation referring to "Main Bearing Cap
No.1 Bolt" under "Main Bearings Inspection:
For M16A Engine with VVT".
a) Tighten bolts (1) – (10) to 30 N⋅m (3.0 kgf-m,
22.0 lb-ft) according to numerical order in the
figure.
b) In the same manner as in Step a), tighten them
to 50 N⋅m (5.0 kgf-m, 36.5 lb-ft).
c) In the same manner as in Step a), retighten them
to 60°.
d) Tighten bolts (11) – (20) to 25 N⋅m (2.5 kgf-m,
I2RH0B140135-01
18.0 lb-ft) according to numerical order in the
figure.
Tightening torque
Main bearing cap No.1 bolt ((1) – (10)): 30
N⋅m (3.0 kgf-m, 22.0 lb-ft), 50 N⋅m (5.0 kgf-m,
36.5 lb-ft) and then retighten by turning
through 60°
Main bearing cap No.2 bolt ((11) – (20)): 25
N·m (2.5 kgf-m, 18.0 lb-ft)
I2RH0B140136-01
3) 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: 0.11 – 0.31 mm (0.0043 – 0.0122 in.)
Limit: 0.35 mm (0.0138 in.)
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I2RH0B140137-01