2008 SUZUKI SWIFT Connecting rod

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Pistons, Piston Rings, Connecting Rods and
Cylinders Disassembly and Assembly
S7RS0B1406031
Disassembly1) Using piston ring expander, remove two compression rings (Top and 2nd) and oil ring from
piston.
2) Remove piston pin from connecting rod as follows. a) Ease out piston pin circlip (1), as shown.
b) Force piston pin out.
Assembly 1) Decarbonize piston head and ring grooves using a suitable tool.
2) Install piston pin to piston (1) and connecting rod (2): a) After applying engine oil to piston pin and piston pin holes in piston and connecting rod.
b) Fit connecting rod as shown in figure.
NOTE
Be sure to position front mark or arrow mark
(4) on piston and oil hole (5) of connecting
rod at specified position as shown in figure.

c) Insert piston pin to piston and connecting rod.
d) Install piston pin circlips (3).
NOTE
Circlip should be installed with its cut part
facing as shown in figure. Install so that
circlip end gap comes within such range as
indicated by arrow.

3) Install piston rings to piston:
• As indicated in the figure, 1st and 2nd rings have discrimination mark (4) respectively. When
installing these piston rings to piston, direct
marked side of each ring toward top of piston.
• 1st ring (1) differs from 2nd ring (2) in thickness, shape and color of surface contacting cylinder
wall.
Distinguish 1st ring from 2nd ring by referring to
the figure.
• When installing oil ring (3), install spacer first and then two rails.
4) After installing three rings (1st, 2nd and oil rings), distribute their end gaps as shown in figure.
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1. 1st ring end gap 3. Oil ring upper rail gap
2. 2nd ring end gap and oil ring spacer gap 4. Oil ring lower rail gap
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Piston Pins and Connecting Rods InspectionS7RS0B1406033
Piston Pin
Visual inspection
Check piston pin, connecting rod small end bore and
piston bore for wear or damage, paying particular
attention to condition of small end bore bush. If pin,
connecting rod small end bore or piston bore is badly
worn or damaged, replace pin, connecting rod and/or
piston.
Piston pin clearance
Check piston pin clearance in small end and piston.
Replace connecting rod and/or piston if its small end is
badly worn or damaged or if measured clearance
exceeds limit.
Piston pin clearance in connecting rod small end
Standard: 0.003 – 0.014 mm (0.0001 – 0.0006 in.)
Piston pin clearance in piston
Standard: 0.006 – 0.017 mm (0.00024 – 0.00067 in.)
Small-end bore
20.003 – 20.011 mm (0.7875 – 0.7878 in.)
Piston pin dia.
19.997 – 20.000 mm (0.7873 – 0.7874 in.)
Piston bore
20.006 – 20.014 mm (0.7876 – 0.7880 in.)Connecting Rod
Big-end side clearance
Check big-end of connecting rod for side clearance, with
rod fitted and connected to its crank pin in the normal
manner. If measured clearance is found to exceed its
limit, replace connecting rod.
Big-end side clearance
Standard: 0.25 – 0.40 mm (0.0098 – 0.0157 in.)
Limit: 0.55 mm (0.0217 in.)
Connecting rod alignment
Mount connecting rod on aligner to check it for bow and
twist. If measured value exceeds the limit, replace it.
Connecting rod alignment
Limit on bow: 0.05 mm (0.0020 in.)
Limit on twist: 0.10 mm (0.0039 in.)
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Connecting rod bearing cap bolt deformation
(Plastic deformation tightening bolt)
Measure each thread diameter of connecting rod
bearing cap bolt (1) at “A” on 32 mm (1.25 in.) from bolt
mounting surface and “B” on 40 mm (1.57 in.) from bolt
mounting surface by using a micrometer (2).
Calculate difference in diameters (“A” – “B”). If it is
exceeds limit, replace connecting rod bearing cap bolt
(1).
Connecting rod bearing cap bolt measurement
points
“a”: 25 mm (0.98 in.)
“b”: 40 mm (1.57 in.)
Connecting rod bearing cap bolt diameter difference
Limit (“A” – “B”): 0.1 mm (0.004 in.)
Crank Pin and Connecting Rod Bearings
Inspection
S7RS0B1406034
Crank Pin Diameter
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 to undersize
and use undersize bearing.
Crank pin diameter
Out-of-round
A – B
Ta p e r
a – b
Crank pin taper and out-of-round
Limit: 0.01 mm (0.0004 in.)
Connecting Rod Bearing General Information
Service connecting rod be arings are available in
standard size and 0.25 mm (0.0098 in.) undersize
bearing, and standard size bearing has 5 kinds of
bearings differing in tolerance.
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 size Crank pin diameter
Standard 41.982 – 42.000 mm
(1.6528 – 1.6535 in.)
0.25 mm (0.0098 in.)
undersize 41.732 – 41.750 mm
(1.6430 – 1.6437 in.)
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1. Red paint
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Connecting Rod Bearing Clearance1) 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 figure.
After applying engine oil to bearing cap bolts (3),
tighten bearing cap bolts (3) gradually as follows.
a) Tighten all bearing cap bolts 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 bolt: 15 N ⋅m (1.5
kgf-m, 11.0 lb-ft) and then retighten by
turning through 45 ° twice 5) Remove cap and using a scale (1) on gauging
plastic envelope (2), measure gauging plastic (2)
width at the widest point (clearance).
If clearance exceed its limit, use a new standard size
bearing referring to “Selection of Connecting Rod
Bearings: ”.
After selecting new bearing, recheck clearance.
Connecting rod bearing clearance
Standard: 0.029 – 0.047 mm (0.0011 – 0.0018 in.)
Limit: 0.065 mm (0.0026 in.)
6) If clearance can not be brought to its limit even by using a new standard size bearing, use next thicker
bearing and recheck clearance or regrind crank pin
to undersize and use 0.25 mm undersize bearing.
Selection of Connecting Rod Bearings
NOTE
• If bearing is in malcondition, or bearing clearance is out of specification, select a
new standard bearing according to the
following procedure and install it.
• When replacing crankshaft or connecting rod and its bearing due to any reason,
select new standard bearings to be
installed by referring to numbers stamped
on connecting rod and its cap and/or
alphabets stamped on crank web of No.3
cylinder.

1) Check stamped numbers on connecting rod and its cap as shown.
Three kinds of numbers (“1”, “2” and “3”) represent
the following connecting rod big end inside
diameters.
For example, stamped number “1” indicates that
corresponding connecting rod big end inside
diameter is 45.000 – 45.006 mm (1.7717 – 1.7718
in.).
Connecting rod big end inside diameter
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Stamped
numbers Connecting rod big end inside diameter
1 45.0000 – 45.0060 mm (1.7717 – 1.7718 in.)
2 45.0061 – 45.0120 mm (1.7719 – 1.7721 in.)
3 45.0121 – 45.0180 mm (1.7722 – 1.7723 in.)
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2) Next, check crankshaft pin diameter. On crank web No.3, four alphabets are stamped as shown in the
figure.
Three kinds of alphabet (“A”, “B” and “C”) represent
the following crankshaft pin diameter respectively.
For example, stamped “A” indicates that
corresponding crankshaft pin diameter is 41.994 –
42.000 mm (1.6533 – 1.6534 in.).
Crankshaft pin outer diameter
3) There are five kinds of standard bearings differing in thickness. To distinguish them, they are painted in
the following colors at the position as indicated in the
figure.
Each color indicated the following thickness at the
center of bearing.
Standard size of connecting rod bearing
thickness
4) From number stamped on connecting rod and its cap and alphabets stamped on crank web No.3,
determine new standard bearing to be installed to
connecting rod big end inside, by referring to the
table.
For example, if number stamped on connecting rod
and its cap is “1” and alphabet stamped on crank
web No.3 is “B”, install a new standard bearing
painted in “Black” to its connecting rod big end
inside.
Specification of new standard connecting rod
bearing size
[A]: Weight indication mark
[B]: Connecting rod big end inside diameter number
Stamped alphabet Crankshaft pin diameter
A 41.9940 – 42.0000 mm (1.6533 – 1.6534 in.)
B 41.9880 – 41.9939 mm (1.6531 – 1.6532 in.)
C 41.9820 – 41.9879 mm (1.6529 – 1.6530 in.)
[A]: Crankshaft pin diameter for No.1 cylinder
[B]: Crankshaft pin diameter for No.2 cylinder
[C]: Crankshaft pin diameter for No.3 cylinder
[D]: Crankshaft pin diameter for No.4 cylinder
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Color
painted Bearing thickness
Blue 1.4991 – 1.5020 mm (0.05902 – 0.05913 in.)
Yellow 1.4961 – 1.4990 mm (0.05890 – 0.05901 in.)
Nothing 1.4931 – 1.4960 mm (0.05878 – 0.05889 in.) Black 1.4901 – 1.4930 mm (0.05867 – 0.05877 in.)
Green 1.4870 – 1.4900 mm (0.05855 – 0.05866 in.)
1. Paint
Number stamped on
connecting rod and its cap (connecting rod big end inside diameter)
123
Alphabet stamped
on crank web No.3 (Crankshaft pin diameter) A Green Black Nothing
B Black Nothing Yellow
C Nothing Yellow Blue
New standard bearing to be installed.
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Main Bearings, Crankshaft and Cylinder Block
Removal and Installation
S7RS0B1406036
Removal1) Remove engine assembly from vehicle referring to “Engine Assembly Removal and Installation”.
2) Remove clutch cover, clut ch disc and flywheel (drive
plate for A/T) by using special tool.
Special tool
(A): 09924–17811
3) Remove piston and connecting rod referring to “Pistons, Piston Rings, Connecting Rods and
Cylinders Removal and Installation”.
4) Remove rear oil seal housing (1). 5) Loosen main bearing cap No.1 and No.2 bolts in
such order as indicated in figure and remove them.
6) Remove crankshaft from cylinder block.
7) Remove piston cooling valves and nozzles, if necessary.
“A”: When servicing CKP sensor, refer to “CMP Sensor Removal and Installation in Section 1C”. :25 N
⋅m (2.5 kgf-m, 18.0 lb-ft)
“B”: Upper half of bearing has an oil groove. : Do not reuse.
“C”: Apply sealant 99000-31250 to mating surface. : Apply engine oil to inside / sliding surface.
“D”: Make sure main bearing cap No.1 bolt deformation when reuse it due to plastic deformation tightening referring to “Main Bearings Inspection”.
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Installation
NOTE
• Use new bearing cap No.1 bolts. They are deformed once they are used because they
are plastic deformation tightening bolts.
• All parts to be insta lled must be perfectly
clean.
• Be sure to oil crankshaft journals, journal bearings, thrust bearings, crankpins,
connecting rod bearings, pistons, piston
rings and cylinder bores.
• Journal bearings, bearing caps, connecting rods, rod bearings, rod bearing
caps, pistons and piston rings are in
combination sets. Do not disturb such
combination and make sure that each part
goes back to where it came from, when
installing.

1) Install sensor plate (1) to crankshaft (2) and tighten bolts to spec ified torque.
NOTE
When installing sensor plate, align spring pin
(3) on crankshaft and hole of sensor plate.

Tightening torque
Sensor plate bolt (a): 11 N·m (1.1 kgf-m, 8.0 lb-ft) 2) Install piston cooling valves and nozzles, if removed.
NOTE
Install piston cooling valve while matching
piston cooling nozzle (1) to positioning (3) of
cylinder block when installed piston cooling
valve (2).

Tightening torque
Piston cooling valve (a): 11 N·m (1.1 kgf-m, 8.0
lb-ft)
3) Install main bearings to cylinder block. Upper half of bearing (1), has an oil groove (2).
Install it to cylinder block (3), and the other half
without oil groove to bearing cap.
Make sure that two halves are painted in the same
color.
4) Confirm that dowel pins (3 ) are installed to intake
side of each journal.
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11) Install flywheel (drive plate for A/T).Using special tool, lock flyw heel or drive plate, and
tighten flywheel or drive plate bolts to specified
torque.
NOTE
Use new flywheel or drive plate bolts.

Special tool
(A): 09924–17811
Tightening torque
Flywheel or drive plate bolt (a): 70 N·m (7.0 kgf-
m, 51.0 lb-ft)
12) Install piston and connecting rod referring to “Pistons, Piston Rings, Connecting Rods and
Cylinders Removal and Installation”.
13) Install cylinder head referring to “Valves and Cylinder Head Removal and Installation”.
14) Install camshafts, tappet and shim referring to “Camshaft, Tappet and Shim Removal and
Installation”.
15) Install timing chain referring to “Timing Chain and Chain Tensioner Removal and Installation”.
16) Install timing chain cover referring to “Timing Chain Cover Removal and Installation”.
17) Install cylinder head cover referring to “Cylinder Head Cover Removal and Installation”.
18) Install oil pan referring to “Oil Pan and Oil Pump
Strainer Removal and Installation in Section 1E”
19) Install engine assembly to vehicle referring to “Engine Assembly Removal and Installation”.
Crankshaft InspectionS7RS0B1406037
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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