MARUTI SUZUKI Zen Estilo 2018, Manual

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1D-46 ENGINE MECHANICAL
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Piston clearance:
Measure cylinder bore diameter and piston diameter to find
their difference which is piston clearance. Piston clearance
should be within specification as given below. If it is out of
specification, rebore cylinder and use oversize piston.
Piston clearance “a” : 0.025 – 0.045 mm (0.0009 – 0.0017
in.)
Note:
Cylinder bore diameters used here are measured in thrust
direction at two positions.
•
Ring groove clearance:
Before checking, piston grooves must be clean, dry and free
of carbon. Fit new piston ring into piston groove, and measure
clearance between ring (1) and ring land by using thickness
gauge (2).
If clearance is out of specification, replace piston.
Ring groove clearance:
Top:0.03 – 0.07 mm (0.0012 – 0.0027 in.)
2nd:0.02 – 0.06 mm (0.0008 – 0.0023 in.)
Piston Pin
•
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 or piston.
•
Piston pin clearance:
Check piston pin clearance in small end. Replace connecting
rod if its small end is badly worn or damaged or if measured
clearance exceeds limit.
Item Standard Limit
Piston clearance 0.003 – 0.016 mm 0.05 mm
in small end (0.0001 – 0.0006 in.) (0.0020 in.)
Small-end bore:
16.003 – 16.011 mm (0.6300 – 0.6303 in.)
Piston pin dia.:
15.995 – 16.000 mm (0.6297 – 0.6299 in.)