Suzuki Engine 2002 GRAND VITARA SQ625, Service Manual

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ENGINE MECHANICAL (H25 ENGINE) 6A2-83
Piston Rings
To measure end gap, insert piston ring (3) into cylinder bore and
then measure the gap by using thickness gauge (2).
If measure gap is out of specification, replace ring.
Piston ring end gap
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 con-
necting rod.
Connecting rod big-end clearance
Standard : 0.25 – 0.35 mm (0.0099 – 0.0137 in.)
Limit : 0.45 mm (0.0177 in.)
• Connecting rod alignment :
Mount connecting rod on aligner to check it for bow and
twist. If limit is exceeded, replace it.
Connecting rod alignment
Limit on bow : 0.05 mm (0.0020 in.)
Limit on twist : 0.10 mm (0.0039 in.)
NOTE:
Clean carbon and any other dirt from top of cylinder bore
before inserting piston ring.
Standard Limit
Top ring
0.20 – 0.35 mm
(0.0079 – 0.0137 in.)
0.7 mm
(0.0275 in.)
2nd ring
0.35 – 0.50 mm
(0.0138 – 0.0196 in.)
0.7 mm
(0.0275 in.)
Oil ring
0.20 – 0.70 mm
(0.0079 – 0.0275 in.)
1.8 mm
(0.0708 in.)
1. Cylinder block
4. 120 mm (4.72 in.)