Piston Pins And Connecting Rods Inspection - Suzuki SX4 Service Manual

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Piston Ring
Piston ring end gap
To measure end gap, insert piston ring (2) into cylinder
bore and then measure the gap by using thickness
gauge (1).
If measured gap exceeds limit, replace ring.
NOTE
Decarbonize and clean top of cylinder bore
before inserting piston ring.
Piston ring end gap
Item
Standard
0.20 – 0.35 mm
Top ring
(0.0079 – 0.0138 in.)
0.35 – 0.50 mm
2nd ring
(0.0138 – 0.0197 in.)
0.20 – 0.70 mm
Oil ring
(0.0079 – 0.0276 in.)
"a": 120 mm (4.72 in.)
Limit
0.7 mm (0.0276 in.)
1.0 mm (0.0394 in.)
1.2 mm (0.0472 in.)
I2RH01140161-01

Piston Pins and Connecting Rods Inspection

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.)
Limit: 0.05 mm (0.00020 in.)
Piston pin clearance in piston
Standard: 0.006 – 0.017 mm (0.00024 – 0.00067 in.)
Limit: 0.05 mm (0.0020 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.)
Engine Mechanical:
1D-53
S7RW0A1406034
I4RS0A140023-01

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